Document:

<PAGE>
                                                                 EXHIBIT 10.29.1

                                        ----------------------------------------
                                        PORTIONS DENOTED WITH [***] HAVE BEEN
                                        OMITTED AND FILED SEPARATELY WITH THE
                                        SECURITIES AND EXCHANGE COMMISSION
                                        PURSUANT TO A REQUEST FOR CONFIDENTIAL
                                        TREATMENT.
                                        ----------------------------------------

                  AMENDMENT NO. 1 TO VOLUME PURCHASE AGREEMENT

     This Amendment No. 1 to the Volume Purchase Agreement (this "AMENDMENT") is
dated as of July 22, 2005 (the "EFFECTIVE DATE"), and is made by and between
Komag USA (Malaysia) Sdn., a Malaysia unlimited liability company ("KOMAG"),
Komag, Incorporated, a Delaware Corporation ("KOMAG INC."), and Western Digital
Technologies, Inc., a Delaware corporation ("WDC").

                                    RECITALS

     A. WDC, Komag and Komag Inc. previously executed a Volume Purchase
Agreement (the "VPA") effective as of June 6, 2005.

     B. WDC, Komag and Komag Inc. now desire to amend the Agreement in the
manner and upon the terms and conditions hereinafter provided in this Amendment.

     NOW, THEREFORE, for and in consideration of the mutual covenants herein
contained and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties executing this
Amendment hereby agree as follows:

                                    AGREEMENT

     1. DEFINED TERMS. Capitalized terms not defined herein shall have the
meanings set forth in the VPA.

     2. TERM. Section 9.1 of the VPA is hereby deleted in its entirety and
replaced with the following:

          9.1 Term. The term of this VPA shall be for eighteen (18) months from
     the date the New Capacity is producing Product at full capacity, including
     capacity and volumes added pursuant to Amendment No.1 to the VPA (the
     "Initial Term"). The Initial Term is currently expected to begin [***]. The
     term of the VPA shall automatically be extended for an additional twelve
     (12) months beyond the Initial Term (the "Second Term") unless either party
     gives written notice to the other party no later than six (6) months prior
     to the end of the Initial Term that it does not want to extend the term of
     the VPA for the Second Term. In the event one party gives such notice of
     its desire not to extend, then unless the parties mutually agree otherwise,
     the VPA shall automatically be extended for an additional six (6) months
     beyond the Initial Term and then terminate automatically at the end of the
     additional six- (6)-month period.

     3. EXHIBIT B. The second page of Exhibit B of the VPA is hereby deleted in
its entirety and replaced with Exhibit B attached hereto.
<PAGE>
     4. EXHIBIT D. Exhibit D of the VPA is hereby deleted in its entirety and
replaced with Exhibit D attached hereto.

     5. EXHIBIT F. Exhibit F of the VPA is hereby deleted in its entirety and
replaced with Exhibit F attached hereto.

     6. MISCELLANEOUS.

     a.   The references to "Section 6.5.4" in Section 4.3.3.4 of the VPA and
          Section 9.2 of the VPA are hereby deleted and replaced with "Section
          6.7".

     b.   The reference to "Komag" in the last paragraph of Section 6.7 of the
          VPA is hereby deleted and replaced with "Komag Inc."

     c.   The reference to "Section 8.4" in Section 8.6.5 of the VPA is hereby
          deleted and replaced with "Section 8.6".

     7. RATIFICATION OF VPA. In the event of an inconsistency between the terms
of this Amendment and the terms of the VPA, the terms of this Amendment shall
control. Except as amended hereby, the VPA is ratified, approved and confirmed
and shall remain in full force and effect in accordance with its terms without
modification.

     8. CONFIDENTIALITY. Each party agrees that the terms and conditions, but
not the existence, of this Amendment will be treated as the other's Confidential
Information subject to Section 11 of the VPA.

     9. ENTIRE AGREEMENT. The VPA, Exhibits, and specific Purchase Orders and
Pull Requests and this Amendment No. 1 set forth the complete agreement between
the parties regarding their subject matter and replace all prior or
contemporaneous communications, understandings or agreements, written or oral,
about this subject.

     10. COUNTERPARTS. This Amendment may be executed in one or more
counterparts, each of which will be deemed to be an original, but all of which
will be considered one and the same instrument. A photocopy of a signature or a
facsimile of a signature shall be as valid as an original.

                                        2
<PAGE>
     IN WITNESS WHEREOF, the parties have caused this Amendment No. 1 to Volume
Purchase Agreement to be signed and accepted by their duly authorized
representatives, effective as of the Effective Date.

Western Digital Technologies, Inc.,       Komag USA (Malaysia) Sdn.
a Delaware corporation.                   a Malaysian corporation

By: /s/ Marty Finkbeiner                  By: /s/ Kheng Huat Oung
    -----------------------------------       ----------------------------------
Name: Marty Finkbeiner                    Name: Kheng Huat Oung
Title: Senior Vice President, Materials   Title: Managing Director

Komag Incorporated
a Delaware corporation

By: /s/ Ray L. Martin
    -----------------------------------
Name: Ray L. Martin
Title: Executive Vice President,
       Customer Sales & Service

                                        3
<PAGE>
                                        ----------------------------------------
                                        PORTIONS DENOTED WITH [***] HAVE BEEN
                                        OMITTED AND FILED SEPARATELY WITH THE
                                        SECURITIES AND EXCHANGE COMMISSION
                                        PURSUANT TO A REQUEST FOR CONFIDENTIAL
                                        TREATMENT.
                                        ----------------------------------------

                                    EXHIBIT B

                                     PRICES

ADDITIONAL PAYMENT TERMS

     WDC shall make [***]payments to Komag Inc. in accordance with the schedule
set forth below [***] to be applied against [***] purchases of Product in
accordance with this Exhibit as set forth below:

     [***]

     [***]Payment [***] shall be made subject to [***] EXHIBIT D. [***]. The
parties acknowledge that the [***] has already been paid and received.
[***]Payment [***] shall be repaid by Komag, Inc. to WDC solely in accordance
with [***] Section 6.7 and 4.3.3 of the VPA.

     The parties agree that it is their mutual intent that [***]Payment [***] be
used by the Komag Group solely for manufacturing and operations in connection
with the [***], and not for the Komag Group's general working capital purposes.

     Starting no earlier than the first date that first production comes off the
[***], and no later than [***], Komag Inc. shall make payments monthly to WDC
equal to [***] for each Unit invoiced during the fiscal month, within 7 days
after the fiscal month-end (regardless of whether such Unit was a result of
[***] or previously existing capacity) (the "PER UNIT OFFSET") [***], then the
remainder of the [***] shall become due and payable to WDC at the end of the
Initial Term, and Komag Inc. shall make such payment in a reasonable period of
time not to exceed 15 Days.

     Notwithstanding the foregoing, in the event WDC makes payment to Komag in
accordance with Section 6.5 of the VPA for Units invoiced during [***], then the
monthly payment by Komag Inc. to WDC referenced in the previous paragraph shall
increase [***].

                                        4
<PAGE>
                                        ----------------------------------------
                                        PORTIONS DENOTED WITH [***] HAVE BEEN
                                        OMITTED AND FILED SEPARATELY WITH THE
                                        SECURITIES AND EXCHANGE COMMISSION
                                        PURSUANT TO A REQUEST FOR CONFIDENTIAL
                                        TREATMENT.
                                        ----------------------------------------

                                    EXHIBIT D

                               PROGRESS MILESTONES

                                      [***]

                                        5
<PAGE>
                                        ----------------------------------------
                                        PORTIONS DENOTED WITH [***] HAVE BEEN
                                        OMITTED AND FILED SEPARATELY WITH THE
                                        SECURITIES AND EXCHANGE COMMISSION
                                        PURSUANT TO A REQUEST FOR CONFIDENTIAL
                                        TREATMENT.
                                        ----------------------------------------

                                    EXHIBIT F

                                     VOLUMES

<TABLE>
<CAPTION>
                          QUARTER                            VOLUME REQUIREMENT
                          -------                            ------------------
<S>                                                          <C>
[***]Fiscal Quarter [***] (i.e., the quarter ending [***])       [***]Units

[***]Fiscal Quarter [***] (i.e., the quarter ending [***])       [***]Units

[***]Fiscal Quarter [***] (i.e., the quarter ending [***])       [***]Units

[***]Fiscal Quarter [***] (i.e., the quarter ending [***])       [***]Units

Each WDC Fiscal Quarter following the [***]Fiscal Quarter        [***]Units
[***] (i.e., each quarter after the quarter ending [***])
for the term of this VPA.
</TABLE>

                                        6<PAGE>
                                                                   EXHIBIT 10.30

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PORTIONS DENOTED WITH [***] HAVE BEEN OMITTED AND FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL
TREATMENT.
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                   SHOWA DENKO / WESTERN DIGITAL TECHNOLOGIES
                                SUPPLY AGREEMENT

     THIS SUPPLY AGREEMENT (this "AGREEMENT") is made and entered into as of
August 17, 2005 ("EFFECTIVE DATE"), by and between SHOWA DENKO K.K.("SHOWA
DENKO"), with offices located at Chiba, Ichihara, Japan, and Western Digital
Technologies, Inc., a Delaware corporation ("WESTERN DIGITAL"), with offices
located at 20511 Lake Forest Drive, Lake Forest, California 92630.

                                    RECITALS

     WHEREAS, SHOWA DENKO and its affiliates manufacture and design Media; and

     WHEREAS, WESTERN DIGITAL, its affiliates or subsidiaries incorporate such
Media into WESTERN DIGITAL'S hard disk drives ("HDD"); and

     WHEREAS, WESTERN DIGITAL desires to purchase Media and SHOWA DENKO desires
to sell such Media, subject to the terms and conditions herein stipulated.

     NOW, THEREFORE, in consideration of the above recitals, premises and the
mutual promises hereinafter contained, and other good and valuable
consideration, the parties hereto agree as follows:

     1. DEFINITIONS. Unless otherwise defined herein, capitalized terms in this
Agreement shall be given the meaning ascribed to them below:

          "BUSINESS DAY" means any day other than a Saturday, Sunday or national
     holiday in United States.

          "FISCAL QUARTER" means Western Digital's fiscal quarters as identified
     in EXHIBIT 3.2.

          "NDA" means that certain Non-Disclosure Agreement by and between
     WESTERN DIGITAL and SHOWA DENKO dated as of April 8, 2003.

          "PURCHASE ORDER" means documents in EDI, email, or fax, issued by
     WESTERN DIGITAL with quantities and/or shipping information, including
     blanket orders of Products and JIT HUB pull signals.

          "SPECIFICATIONS" means designs, drawings, prints and written
     descriptions, specification reviews and requirements for the Products,
     including any changes or updates thereto.

          "MEDIA" means a blank substrate of glass or aluminum which has been
     manufactured through multiple process steps to form a completed magnetic
     rotating disc which is used in combination with magnetic heads.

                                        1
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TREATMENT.
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          "MATERIAL DEFAULT" shall mean the occurrence of any of the following,
     provided that in the event any of the following conditions are cured within
     the time periods set forth therein, then no Material Default shall have
     occurred:

          (i) a failure of SHOWA DENKO to deliver in a given Fiscal Quarter the
     Volume Requirements (subject to Section 5.1), or the failure of SHOWA DENKO
     to accept a Purchase Order issued in accordance with Section 4.4, and the
     failure by SHOWA DENKO to remedy such condition within ten (10) Business
     Days after SHOWA DENKO has received notice thereof;

          (ii) a failure of WESTERN DIGITAL to meet its payment obligations
     under Section 3.5, and the failure by WESTERN DIGITAL to remedy such
     condition within ten (10) Business Days after WESTERN DIGITAL has received
     notice thereof; or

          (iii) a material breach by either party of any obligation, covenant,
     or condition under this Agreement that is susceptible of cure, and the
     failure by the breaching party to cure such breach within thirty (30)
     Business Days after the breaching party has received notice of such
     default, provided that if the cure requires more than thirty (30) Business
     Days, a Material Default will be deemed to exist if the breaching party
     fails to (i) promptly take action to cure such breach as quickly as
     reasonably possible; or (ii) cure such breach within sixty (60) days after
     the breaching party has received notice of such default;

          (iv) an assignment or attempted assignment in violation of Section 13.

          "WDM" means Western Digital (Malaysia) Sdn Bhd.

          "WDTH" means Western Digital (Thailand) Company Limited.

2.   PURCHASE AND SALE OF PRODUCTS; TERM

          2.1 Term. The term of this agreement shall commence on the Effective
     Date and expire on December 31, 2007 (the "TERM"). During the Term WESTERN
     DIGITAL shall designate SHOWA DENKO as a qualified supplier for Media and
     SHOWA DENKO shall supply to WESTERN DIGITAL the Volume Requirements,
     subject to the terms and conditions of this Agreement. To fulfill the
     Volume Requirements, SHOWA DENKO may supply to WESTERN DIGITAL or its
     Affiliates the Media manufactured by its owned and controlled affiliates,
     SHOWA DENKO HD TRACE CORPORATION, SHOWA DENKO HD K.K. and/or SHOWA DENKO HD
     SINGAPORE PTD., LTD., (each, a "Showa Affiliate"), provided that each
     location of each Showa Affiliate can produce Media that meets WD's
     Specifications and performance and reliability standards as set forth
     herein. In the event any Showa Affiliate does not meet such Specifications
     and standards, then SHOWA DENKO must meet the Volume Requirements with
     Media from a different Showa Affiliate.

                                        2
<PAGE>
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PORTIONS DENOTED WITH [***] HAVE BEEN OMITTED AND FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL
TREATMENT.
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          2.2 Qualified Supplier. Upon completing qualification requirement for
     each Product, SHOWA DENKO will be a qualified supplier of the particular
     Product.

          2.3 Conditions. WESTERN DIGITAL'S obligation to purchase any Products
     from SHOWA DENKO under this Agreement is contingent on such Products,
     including all components thereof and the manufacturing process thereto,
     being qualified to WESTERN DIGITAL'S standards and Specifications (the
     "Condition"). In the event that this Condition is not met or is breached
     for any reason, WESTERN DIGITAL shall have the right to (A) waive such
     unsatisfied Condition, or (B) to terminate this Agreement in part with
     respect to any Product for which such Condition is not satisfied.

          2.4 Limitations. Unless and until such Condition is satisfied, WESTERN
     DIGITAL shall not be obligated under this Agreement to designate SHOWA
     DENKO as a qualified supplier of any Product for which the Conditions have
     not been satisfied or purchase any such Products under this Agreement.

          2.5 Design Qualifications. When WESTERN DIGITAL and/or its affiliates
     intend to obtain a new design qualification from its OEM and Distribution
     customers with respect to hard disk drives, WESTERN DIGITAL and its
     affiliates shall [***].

3.   [***]; INVOICES AND PAYMENT.

          3.1 Products. In accordance with the terms set forth in this
     Agreement, WESTERN DIGITAL shall purchase from SHOWA DENKO the MEDIA
     products set forth on Exhibit 3.1 hereto as may be amended in writing from
     time to time by mutual agreement of the parties (the "PRODUCTS"). WESTERN
     DIGITAL may authorize its affiliates to purchase Product and place Purchase
     Orders under the terms and conditions of this Agreement.

          3.2 Volume. The minimum quantities of the Products sold and purchased
     hereunder for each Fiscal Quarter is set forth on Exhibit 3.2 hereto (the
     "VOLUME REQUIREMENTS"). Purchases by WESTERN DIGITAL'S affiliates shall be
     included in the total Volume Requirements.

          3.3 [***]. [***] for the Products and payment terms is set forth on
     EXHIBIT 3.3 hereto (the "[***]") which is incorporated herein by reference.

          a.   [***] In the event that WESTERN DIGITAL elects to challenge the
               [***] of the Products under this clause, the parties shall
               follow the procedures set forth in Section 3.3(b) below.

                                        3
<PAGE>
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PORTIONS DENOTED WITH [***] HAVE BEEN OMITTED AND FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL
TREATMENT.
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          b.   [***]. With respect to [***] clause in Section 3.3(a) above and
               Exhibit 3.3 hereto, [***].

          c.   In the event the parties [***] as described in this Section 3.3,
               either party may, upon written notice to the other, submit such
               dispute to the Chief Executive Officer of SHOWA DENKO and the
               Chief Operating Officer of WESTERN DIGITAL, or their respective
               designees, who shall meet to attempt to resolve the dispute by
               good faith negotiations. In the event the parties are unable to
               come to agreement upon [***] within five (5) Days after such
               notice is given, either party may proceed with arbitration in
               accordance with the Commercial Arbitration Rules of the American
               Arbitration Association and each party shall appoint one
               arbitrator, and the two arbitrators thus appointed will appoint a
               third arbitrator.

          3.4 Submission of Invoices. WESTERN DIGITAL shall order Products under
     this Agreement by submitting Purchase Orders in accordance with Section 4.4
     hereof. SHOWA DENKO will submit invoices to WESTERN DIGITAL or its
     affiliates no earlier than (i) with respect to direct shipments to
     WDM/WDTH, the date of receipt of Products by WDM/WDTH's third party
     transporter at the airport in the country where WDM/WDTH's plant is
     located; (ii) with respect to direct shipments to WESTERN DIGITAL or its
     affiliates other than WDM/WDTH, the date of shipment of Products to WESTERN
     DIGITAL or its affiliates; and (iii) with respect to Products pulled from a
     JIT Hub, the date of withdrawal from the JIT Hub.

          3.5 Payment of Invoices. The Price for Product shall be paid in United
     States currency. Payment from WESTERN DIGITAL for undisputed amounts due
     under an appropriately submitted invoice shall be made within [***] days
     (or such longer period as mutually agreed upon by the parties) after the
     date of the invoice issued in accordance with Section 3.4.

4.   FORECASTS AND ORDERS.

          4.1 Long-Term Forecast. In order to assist SHOWA DENKO in planning
     production, WESTERN DIGITAL shall provide SHOWA DENKO on a calendar month
     basis with a four quarter rolling forecast of the quantities and
     configurations of Products required by WESTERN DIGITAL and its affiliates,
     including projected volumes by program (the "WD QUARTERLY FORECASTS"). The
     rolling WD Quarterly Forecasts shall be by week for first quarter of each
     forecast and by month for the second, third and fourth quarters of each
     forecast. In addition, WESTERN DIGITAL will provide SHOWA DENKO with a
     forecast at least annually of its anticipated Product needs extending for a
     one year period after the then applicable WD Quarterly Forecast (the
     "LONG-TERM FORECASTS"). The parties understand and agree that the WD
     Quarterly Forecasts and the Long-Term Forecasts are intended to be
     estimates for planning purposes only and shall not be binding upon WESTERN
     DIGITAL.

                                        4
<PAGE>
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PORTIONS DENOTED WITH [***] HAVE BEEN OMITTED AND FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL
TREATMENT.
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          4.2 13-Week Forecasts. WESTERN DIGITAL shall use commercially
     reasonable efforts to provide SHOWA DENKO with a thirteen (13) week rolling
     forecast (the "13 WEEK FORECAST") of its Product requirements, updated
     weekly on or before the close of business, California time, on an
     agreed-upon Business Day of each week. The parties understand and agree
     that all 13 Week Forecasts are intended to be estimates for planning
     purposes only and shall not be binding upon both Parties.

          4.3 SHOWA DENKO will procure and maintain all necessary equipment,
     personnel, facilities, and other materials required to manufacture Products
     in volumes sufficient to meet the Volume Requirements.

          4.4 Order. WESTERN DIGITAL (or its affiliates) shall, if it desires to
     purchase Products from SHOWA DENKO, furnish to SHOWA DENKO a quarterly firm
     Purchase Order for the purchase of such Products not later than [***]
     before such Fiscal Quarter. Purchase Orders will include (i) Product's
     description, and (ii) the ship-to and bill-to addresses.

          4.5 Order Reschedule; Cancellation. WESTERN DIGITAL or its affiliates
     may reschedule the shipment date of any undelivered Products multiple times
     within any Fiscal Quarter, and may reschedule up to [***]% of the Volume
     Requirements for any Fiscal Quarter in the subsequent Fiscal Quarter,
     without charge or liability under this Agreement. WESTERN DIGITAL shall be
     responsible for reasonable charges for rescheduling shipment dates other
     than in accordance with the preceding sentence. WESTERN DIGITAL may
     redirect shipments of Products under any Purchase Order to alternate
     locations, and WESTERN DIGITAL shall be responsible only for the difference
     (if any) between the shipping costs to the original shipment location and
     the new location. WESTERN DIGITAL may cancel a Purchase Order within [***]
     of a scheduled delivery date only with consent from SHOWA DENKO. If SHOWA
     DENKO consents, then WESTERN DIGITAL or its affiliates may be liable for
     certain "ORDER CANCELLATION FEES" (unless such cancellation was for cause).
     Such Order Cancellation Fees shall include only the cost of materials that
     SHOWA DENKO cannot cancel, return to its supplier for credit, sell or
     divert to another use. In addition, such Order Cancellation Fees shall not
     in any event exceed the Price for any finished goods inventory manufactured
     by SHOWA DENKO consistent with the 13 Week Forecast that is attributable to
     such cancellation, modification or termination, and in no event more than
     [***] of finished goods inventory of Products.

          4.6 Direct Order Acknowledgement. If Products are not ordered by
     WESTERN DIGITAL or its affiliates through the JIT Hub, and WESTERN DIGITAL
     or its affiliates instead issues to SHOWA DENKO a direct purchase order for
     Product, then an order acknowledgement shall be provided by SHOWA DENKO to
     WESTERN DIGITAL or its affiliates within ninety-six (96) hours of receipt
     of the purchase order for Product from WESTERN DIGITAL or its affiliates.
     Failure by SHOWA DENKO to send an order acknowledgement shall not be deemed
     to signify SHOWA DENKO'S objection to or disapproval of a purchase order
     for a Product (as defined in this Agreement), but shall be deemed to be
     SHOWA DENKO'S acknowledgement thereof.

                                        5
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PORTIONS DENOTED WITH [***] HAVE BEEN OMITTED AND FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL
TREATMENT.
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          4.7 Obligation to Fulfill Orders. SHOWA DENKO must accept all Purchase
     Orders for Products issued by WESTERN DIGITAL or its affiliates, if the
     offered volumes of the Products in such Purchase Orders do not exceed the
     Volume Requirements. In the event that a Purchase Order for such Products
     issued by an WESTERN DIGITAL or its affiliates offers a volume of the
     Products in excess of the Volume Requirements and if SHOWA DENKO does not
     desire to accept such Purchase Order, SHOWA DENKO shall promptly (and in no
     event later than ninety-six (96) hours from the time SHOWA DENKO receives
     such Purchase Order) notify the WESTERN DIGITAL or its affiliates so that
     the parties may discuss to attempt to avoid disruption in the supply chain.
     Notwithstanding the foregoing, WESTERN DIGITAL shall have the opportunity
     to amend any Purchase Order to be consistent with the Volume Requirements
     and SHOWA DENKO shall at all times be required to supply WESTERN DIGITAL
     the Volume Requirements.

5.   DELIVERY.

          5.1 General. SHOWA DENKO shall deliver the Volume Requirements to
     WESTERN DIGITAL or its affiliates in during each Fiscal Quarter in
     accordance with Purchase Orders in amounts equal to (i) a minimum of [***]
     percent ([***]%) of the Volume Requirements for each of the first two
     months of the then applicable Fiscal Quarter and (ii) [***] percent
     ([***]%) of the Volume Requirements by the end of the eleventh (11th) week
     of the applicable Fiscal Quarter and (iii) [***] percent ([***]%) of the
     Volume Requirements by the end of the last week of the applicable Fiscal
     Quarter. Delivery terms are DDU WESTERN DIGITAL or its affiliates facility
     or JIT Hub. SHOWA DENKO shall fulfill Purchase Orders in exact quantities,
     provided, however if the difference between actual SHOWA DENKO Product
     deliveries and the Volume Requirements for a Fiscal Quarter is not more
     than [***] percent ([***]%) of the Volume Requirements for such Fiscal
     Quarter, SHOWA DENKO may increase the Volume Requirement for the subsequent
     Fiscal Quarter by a number of Products equal to such shortfall. In the
     event of an incomplete shipment, and provided that WESTERN DIGITAL or its
     affiliates has not notified SHOWA DENKO that WESTERN DIGITAL or its
     affiliates will not accept an additional partial shipment to complete the
     incomplete shipment, SHOWA DENKO shall promptly make up any incomplete
     shipments as soon as possible (and in no event later than [***] days),
     using expedited means of transportation at SHOWA DENKO'S sole expense.

          5.2 Just-in-Time Hub. SHOWA DENKO will provide just-in-time delivery
     using hubs located at or near WESTERN DIGITAL'S manufacturing or
     distribution facilities in Malaysia and Thailand ("JIT HUBS"). SHOWA DENKO
     will: (i) bear all costs associated with warehousing Products in the JIT
     Hub(s); (ii) ensure that WESTERN DIGITAL or its affiliates may withdraw
     Products from the JIT Hub(s) as needed; (iii) retain title to Products
     until they are physically delivered to WESTERN DIGITAL or its affiliates or
     its carrier upon withdrawal from the JIT Hub(s); (iv) fully insure or
     require the JIT Hub(s) operator to fully insure all Products in transit to
     or stored at a Hub against all risk of loss or damage until such time as
     WESTERN DIGITAL or its affiliates

                                        6
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     takes title to them; and (v) require that the Hub operator take all steps
     necessary to protect all Products in a JIT Hub consistent with good
     commercial warehousing practice.

          5.3 JIT Hub Inventory Levels. SHOWA DENKO will maintain inventory of
     Products at the JIT Hub(s) of not less than [***], and not more than [***],
     of the WESTERN DIGITAL or its affiliates scheduled pulls based on the 13
     Week Forecasts consistent with the relevant Volume Requirements in effect
     at the lead time necessary for SHOWA DENKO to manufacture the Products (the
     "JIT HUB INVENTORY"). As WESTERN DIGITAL or its affiliates purchase Product
     from the JIT Hub(s), SHOWA DENKO will replenish the inventory in accordance
     with the 13 Week Forecast consistent with the relevant Volume Requirements
     in effect at the lead time necessary for SHOWA DENKO to manufacture such
     replenishing inventory.

          5.4 On-Time Delivery. TIME IS OF THE ESSENCE as to the delivery of
     Products. In the event SHOWA DENKO anticipates that it will not be able to
     make shipments in conformance with a Purchase Order, without limiting
     WESTERN DIGITAL'S rights or remedies under this Agreement, SHOWA DENKO will
     promptly notify the WESTERN DIGITAL or its affiliates and will work with
     the WESTERN DIGITAL or its affiliates to remedy the issues giving rise to
     such nonconformance and to limit the impact of such nonconformance in
     accordance with the following procedures:

          a.   SHOWA DENKO shall use its best efforts to provide WESTERN DIGITAL
               with a remedy/corrective action plan within twenty four (24)
               hours after notice to the WESTERN DIGITAL or its affiliates and
               WESTERN DIGITAL;

          b.   In the event SHOWA DENKO is unable to provide a remedy/corrective
               action plan within twenty four (24) hours, SHOWA DENKO will
               provide daily updates until a remedy/corrective action plan is
               identified;

          c.   If WESTERN DIGITAL is not satisfied with SHOWA DENKO' progress on
               the remedy/corrective action plan, WESTERN DIGITAL may initiate a
               management level discussion;

          d.   If the managers are unable to agree on a satisfactory resolution,
               the management may initiate a vice president level discussion to
               resolve WESTERN DIGITAL'S concerns; and

          e.   If the parties are unable to reach a mutually agreeable
               resolution within five (5) days of the commencement of the
               escalation process described in (c) above, then each party shall
               be entitled to enforce its rights and remedies under this
               Agreement and pursuant to applicable law.

          5.5 Process Management Plans. If requested by WESTERN DIGITAL in
     writing, SHOWA DENKO shall provide Process Management Plans ("PMP'S") for
     all

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     parts or processes as they relate to the production of Products within five
     (5) days after receipt of the request.

          5.6 Supply Chain Management. Quarterly, or as requested by WESTERN
     DIGITAL, SHOWA DENKO shall provide to WESTERN DIGITAL supply chain
     information including worldwide inventory volumes of the Products sold or
     to be sold to WESTERN DIGITAL or its affiliates and pull rates for such
     Products.

          5.7 Process and Design Changes. The parties will agree upon a
     qualification process or plan for process or design changes that will
     provide WESTERN DIGITAL with modeling (where applicable), prototyping,
     testing and approval by WESTERN DIGITAL prior to cut-in on WESTERN
     DIGITAL'S production or development lines. SHOWA DENKO shall respond in
     writing to WESTERN DIGITAL within five (5) Business Days after receiving a
     WESTERN DIGITAL requested process or design change. SHOWA DENKO response
     shall confirm the nature of the change, analyze the impact of the change on
     both SHOWA DENKO and WESTERN DIGITAL and identify a plan of action. SHOWA
     DENKO will not modify the Products, any of their components or materials,
     or any related manufacturing processes without obtaining WESTERN DIGITAL'S
     prior written consent.

          5.8 Quarterly Business Reviews. WESTERN DIGITAL and SHOWA DENKO shall
     meet on a quarterly basis for a quarterly business review. The parties
     shall review SHOWA DENKO'S performance during the preceding quarter,
     identify areas for improvement and recommend actions to be taken by either
     party to satisfy the parties' business goals. In addition, each quarterly
     business review will allocate time to review future product roadmap plans
     between the parties, and also product, process, cost and quality
     improvements.

6.   WARRANTY.

          6.1 Warranty Period. The warranty period for the Products is for a
     period of one (1) year commencing upon the date of delivery of the Products
     (or the date pulled from the JIT Hub, as applicable) (the "WARRANTY
     PERIOD").

          6.2 Warranties. SHOWA DENKO represents and warrants to WESTERN DIGITAL
     and its affiliates the following (the "MEDIA WARRANTY"):

               a.   During the Warranty Period, the Products conform to all
                    applicable Specifications; and

               b.   During the Warranty Period, the Products will be free from
                    defects in material and workmanship; and

               c.   The Products do not infringe any patent rights, copyrights,
                    trademarks, trade secret, mask work right or other
                    intellectual property right of any third party; and

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               d.   The Products are new and comprised of new materials, are not
                    misbranded, falsely labeled or invoiced.

          6.3 WESTERN DIGITAL'S acceptance, testing or approval of the goods,
     design or materials will not relieve supplier of any warranty obligations.

          6.4 EXCLUSIVE WARRANTIES; THIRD PARTY BENEFICIARIES. THE WARRANTIES
     SET FORTH ABOVE ARE EXCLUSIVE, AND NEITHER PARTY MAKES ANY OTHER WARRANTY,
     EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY OF
     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. EACH
     WESTERN DIGITAL AFFILIATE IS A THIRD PARTY BENEFICIARY OF THE RIGHTS AND
     REMEDIES AFFORDED WESTERN DIGITAL AS CONTAINED IN THIS SECTION 6, AND
     NEITHER SHOWA DENKO NOR ANY WESTERN DIGITAL AFFILIATE MAY ABRIDGE,
     TERMINATE, WAIVE OR OTHERWISE DEROGATE THE BENEFITS AFFORDED TO WESTERN
     DIGITAL OR ITS AFFILIATES PURSUANT TO THIS SECTION 6.

7.   WARRANTY REMEDIES.

          7.1 Defective Products. If a Product (either individually or by lot)
     (i) fails to meet any of the MEDIA Warranties set forth in Section 6.2,
     (ii) fails to meet its intended capacity either due to poor cumulative
     performance of the Product within the drive or the non-performance of an
     individual Product and therefore ships at a lower capacity than originally
     contemplated by the parties hereto or (iii) fails to meet WESTERN DIGITAL
     requirements for quality, reliability or factory performance, which
     requirements must be disclosed and confirmed by SHOWA DENKO in advance,
     (either (i), (ii) or (iii), a "DEFECTIVE PRODUCT"), then WESTERN DIGITAL
     shall be entitled to return for replacement or 100% full credit of the
     purchase price of such Defective Product, at its election. The decision to
     rework drives and return Products for credit or replacement or to exercise
     the option of applying an alternate format (alt format) or waterfall shall
     be at WESTERN DIGITAL'S sole discretion.

          7.2 RMA. WESTERN DIGITAL or its affiliates must notify SHOWA DENKO of
     any Defective Product in writing within the applicable Warranty Period.
     SHOWA DENKO will promptly issue a return materials authorization number
     ("RMA NUMBER") for such Defective Product. SHOWA DENKO shall issue the RMA
     Number within [***] after receipt of a proper request therefor and its
     confirmation the Products in question are Defective Products.

          7.3 Corrective Action. Within [***] of receiving written request from
     WESTERN DIGITAL or its affiliates to respond to a Defective Product, or a
     customer complaint, request for assistance or stop order relating to
     Product, SHOWA DENKO shall send a written response to WESTERN DIGITAL or
     its affiliates identifying proposed containment actions, field impact,
     failure analysis schedule and an estimated completion date for root cause
     analysis and recovery action plans.

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          7.4 Epidemic Failure. If at any time:

               (a)  the Annual Failure Rate ("AFR") of a WESTERN DIGITAL HDD
                    product rises to a level that triggers an "Excessive
                    Defect," "Epidemic Defect," or "Excessive Failure" clause,
                    or a similar clause, in a contract, agreement or purchase
                    order between WESTERN DIGITAL and a WESTERN DIGITAL customer
                    (collectively, "Epidemic Failure"), and (ii) the defect
                    causing the hard disk drive failures is attributable to a
                    Defective Product, or

               (b)  the AFR of the Product exceeds [***] percent ([***]%);

                    then SHOWA DENKO shall reimburse WESTERN DIGITAL for all
                    expenses that WESTERN DIGITAL incurs in good faith to
                    diagnose the defect, develop tests and remedies, promptly
                    respond to customer inquiries and complaints, promptly
                    return and replace such defective Product at WESTERN DIGITAL
                    or its affiliates facilities, at JIT Hubs, or otherwise
                    positioned for use or consumption by WESTERN DIGITAL or its
                    affiliates, replace the hard disk drive in which the
                    defective Product is located, and transport to a repair or
                    returns center the hard disk drive in which the defective
                    Product is located, provided, that SHOWA DENKO'S
                    responsibilities under this Agreement for Epidemic Failure
                    in no event shall exceed the total price paid by WESTERN
                    DIGITAL for Products in the [***] period immediately prior
                    to the claim.

          7.5 SHOWA DENKO agrees to promptly notify WESTERN DIGITAL if it has
     reason to believe that Products are likely to present a safety risk to
     WESTERN DIGITAL personnel or its customers, or the AFR of the Products is
     expected to exceed [***] percent ([***]%).

8.   INDEMNIFICATION.

     SHOWA DENKO shall defend, indemnify and hold WESTERN DIGITAL or its
     affiliates harmless from any claims of, or damages arising out of (or
     alleged to have arisen out of) the following (any of the following being
     referred to as a "CLAIM"): (i) the breach of SHOWA DENKO' representations
     and warranties contained in Section 6.2 of this Agreement, (ii)
     infringement of any third party's patent, copyright, trademark, trade
     secret, mask work right or other intellectual property right, on their own
     or in combination with other goods, (provided that the infringement would
     not have occurred but for the incorporation of the Product in WESTERN
     DIGITAL disk drive products); (iii) the misappropriation by SHOWA DENKO of
     any third party's trade secrets as a result of information used by SHOWA
     DENKO in connection with supplying Products under this Agreement (iv)
     negligent acts or omissions of SHOWA DENKO or its personnel, and/or (v)
     SHOWA DENKO' breach of a material term of this Agreement.

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     SHOWA DENKO will have authority to control the defense of and defend all
     Claims relating to its indemnification obligations with counsel of its own
     choosing. WESTERN DIGITAL shall: (i) provide SHOWA DENKO prompt notice in
     writing of any Claim and permit SHOWA DENKO, through counsel selected by
     SHOWA DENKO and reasonably acceptable to WESTERN DIGITAL and SHOWA DENKO,
     to answer and defend such Claim; and (ii) provide SHOWA DENKO information,
     assistance and authority, at SHOWA DENKO'S expense, to help SHOWA DENKO to
     defend such Claim. Notwithstanding anything to the contrary and in the case
     of a final award or settlement, SHOWA DENKO shall pay such award but shall
     not be responsible for any settlement made without its prior written
     consent. SHOWA DENKO may not settle any Claim under this Section on WESTERN
     DIGITAL'S behalf without first obtaining WESTERN DIGITAL'S written
     permission. In the event WESTERN DIGITAL and SHOWA DENKO agree to settle a
     Claim, the parties agree not to publicize the settlement without first
     obtaining the other's written permission, which permission shall not be
     unreasonably withheld.

     If a third party files a claim in a court of competent jurisdiction
     alleging that the Products infringe an intellectual property right, SHOWA
     DENKO will, in addition to its obligations under the first paragraph of
     this Section 8, promptly notify WESTERN DIGITAL in writing and, at its own
     expense, exercise the first of the following remedies that is practicable:
     (i) obtain for WESTERN DIGITAL the right to continue to use and sell the
     Products consistent with this Agreement; (ii) modify the Products so they
     are non-infringing and in compliance with this Agreement; (iii) replace the
     Products with non-infringing ones that comply with this Agreement; or (iv)
     at WESTERN DIGITAL'S request, accept the cancellation of infringing
     Products and refund any amount paid for such infringing Products.

9.   EACH WESTERN DIGITAL AFFILIATE IS A THIRD PARTY BENEFICIARY OF THE RIGHTS
     AND REMEDIES AFFORDED WESTERN DIGITAL AS CONTAINED IN THIS AGREEMENT,
     INCLUDING SECTIONS 6 (WARRANTY) AND 8 (INDEMNIFICATION), AND NEITHER SHOWA
     DENKO NOR ANY WESTERN DIGITAL OR ITS AFFILIATES MAY ABRIDGE, TERMINATE,
     WAIVE OR OTHERWISE DEROGATE THE BENEFITS AFFORDED TO WESTERN DIGITAL AND
     THE WESTERN DIGITAL OR ITS AFFILIATES THEREUNDER.

10.  LIMITATION OF LIABILITY. EXCEPT FOR (I) SHOWA DENKO'S BREACH OF THE MEDIA
     WARRANTY CAUSING EPIDEMIC FAILURE AS SET FORTH IN SECTION 7.4, AND SUBJECT
     TO THE LIMITATION SET FORTH THEREIN or (II) INDEMNIFICATION OBLIGATIONS AS
     SET FORTH IN SECTION 8 AND (III) CONFIDENTIALITY (SECTION 22.1)(INCLUDING
     THOSE CONTAINED IN THE NDA), IN NO EVENT SHALL EITHER PARTY BE LIABLE TO
     THE OTHER FOR ANY INCIDENTAL OR CONSEQUENTIAL, INDIRECT, OR SPECIAL DAMAGES
     OF ANY KIND, INCLUDING WITHOUT LIMITATION, LOST PROFITS OR SAVINGS, LOST
     REVENUES OR BUSINESS INTERRUPTION BASED ON ANY BREACH OR DEFAULT OF THE
     OTHER PARTY, WHETHER FOR BREACH

                                       11
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     OF ANY WARRANTY, FOR BREACH OR REPUDIATION OF ANY OTHER TERM OR CONDITION,
     FOR NEGLIGENCE, ON THE BASIS OF STRICT LIABILITY, OR OTHERWISE. NEITHER
     PARTY SHALL BE LIABLE TO THE OTHER FOR ANY EXEMPLARY OR PUNITIVE DAMAGES OF
     ANY KIND.

11.  TECHNOLOGY EXCHANGE PROVISION.

          11.1 SHOWA DENKO shall provide detailed product and process design
     specifications, drawings, documents and test data for all Products (as
     detailed in EXHIBIT 3.1) or Media under supply, development or planned
     development for WESTERN DIGITAL.

          11.2 WESTERN DIGITAL shall provide all MEDIA relevant specifications,
     documents, test data and product characterization results for MEDIA or
     products manufactured by WESTERN DIGITAL in which a SHOWA DENKO Product is
     installed or to be installed.

          11.3 Development platforms to be disclosed under this Section 11
     include, all standard [***] products.

          11.4 Each party as required will be allowed access to each parties
     facilities in the normal course of business to allow "reasonable and
     normal" auditing of product and process to insure compliance to product,
     process and environmental requirements.

12.  TERMINATION OF AGREEMENT.

          12.1 Termination. Subject to Sections 12.4 and 12.5:

          a.   in the event of a material failure of SHOWA DENKO to meet
               mutually agreed development milestones with respect to a Product
               or maintain the quality level of a particular Product to WESTERN
               DIGITAL'S reasonable satisfaction, this Agreement may be
               terminated in part as to the designation of SHOWA DENKO as a
               qualified supplier under this Agreement of such specific Product
               upon not less than 30 days advance written notice by WESTERN
               DIGITAL to SHOWA DENKO, and the Volume Requirements may be
               reduced by WESTERN DIGITAL accordingly in its discretion; or

          b.   in the event of a Material Default by the other party that is not
               cured within ten (10) days after written notice of such Material
               Default, which notice must describe the reason for such Material
               Default, then the other party may terminate this Agreement
               effective immediately.

          12.2 Termination for Insolvency. If either SHOWA DENKO or WESTERN
     DIGITAL (i) makes a general assignment for the benefit of creditors or
     becomes insolvent; (ii) files an insolvency petition in bankruptcy; (iii)
     petitions for or acquiesces

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     in the appointment of any receiver, trustee or similar officer to liquidate
     or conserve its business or any substantial part of its assets; (iv)
     commences under the laws of any jurisdiction any proceeding involving its
     insolvency, bankruptcy, reorganization, adjustment of debt, dissolution,
     liquidation or any other similar proceeding for the release of financially
     distressed debtors; or (v) becomes a party to any proceeding or action of
     the type described above in (iii) or (iv) and such proceeding or action is
     not dismissed or relief from stay is not obtained for a period of more than
     sixty (60) days, then the other party may by written notice terminate this
     Agreement in its entirety with immediate effect.

          12.3 Termination Upon Change in Control. In the event that more than
     fifty percent (50%) of the outstanding shares or securities (representing
     the right to vote for the election of directors or other managing
     authority) of one party hereto hereafter become owned or controlled,
     directly or indirectly, by a third party, or upon a merger, consolidation
     or sale of all or substantially all of a party's assets ("CHANGE OF
     CONTROL"), said one party shall promptly give notice of such Change of
     Control to the other party, and the other party shall have the right upon
     written notice to the other party to terminate this agreement upon the date
     set forth in the notice following such Change of Control and the Change of
     Control shall constitute a Material Default. If said one party does not
     have outstanding shares or securities, such Change of Control shall be
     deemed to occur if more than fifty percent (50%) of its ownership interest
     representing the right to make decisions for said party is acquired by said
     third party.

          12.4 Effect of Termination. In all cases the provisions of Sections
     4.5, 4.7, Section 6 through 10, this Section 12.4, Section 12.5, Section
     16, Section 17.2 (document retention requirements) and Sections 21 and 22
     shall survive the termination hereof.

          12.5 Separation Plan. In the event that this Agreement is terminated
     in whole or in part, then within ten (10) days after written notice of
     termination, the parties shall meet to develop a mutually agreed upon
     separation plan. Unless the termination of this Agreement was a result of
     SHOWA DENKO'S failure to meet the Specifications or the Product was found
     to infringe on a third party's intellectual property right, WESTERN DIGITAL
     or its affiliates shall be permitted, in their discretion, to continue to
     order Products in accordance with Section 4.4 hereof, and SHOWA DENKO shall
     continue to supply Products to WESTERN DIGITAL or its affiliates in
     accordance with such orders and forecasts and this Agreement for the "FINAL
     TRANSITION PERIOD" as defined below after termination of this Agreement, in
     whole or in part, and otherwise in accordance with such mutually agreed
     upon separation plan. Notwithstanding anything to the contrary contained
     herein, SHOWA DENKO shall not be obligated to sell Product to WESTERN
     DIGITAL or its affiliates for more than 180 days. This Agreement shall
     remain in full force and effect with respect to such orders and forecasts
     until the earlier of (i) the date specified in the mutually agreed upon
     separation plan; or (ii) expiration of the applicable Final Transition
     Period. As used herein, the "Final Transition Period" means one hundred
     eighty (180) days, and this Agreement, including Pricing and Media
     Warranty, shall continue in effect during such 180 day period.

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13.  TRANSFERABILITY OF RIGHTS AND OBLIGATIONS. This Agreement is not assignable
     without the express written consent of the other party. Notwithstanding the
     foregoing, upon notice to SHOWA DENKO, WESTERN DIGITAL may assign this
     Agreement to any wholly owned Subsidiary of WESTERN DIGITAL CORPORATION, a
     Delaware corporation. Any delegation or assignment made in contravention of
     this Section shall be void and of no legal force or effect.

14.  NOTICE. Whenever notice is required under the provisions of this Agreement,
     such notice shall be in writing, shall be in English, shall be sent to the
     other party at the address set forth below or at such other address as the
     party shall have specified by written notice and shall be deemed
     sufficiently given (i) upon receipt, if sent by air courier service
     (requiring signature upon receipt), or (ii) five (5) days after deposit,
     postage prepaid, in U.S. or international airmail.

          If to SHOWA DENKO
          SHOWA DENKO K.K.
          5-1 YAWATAKAIGAN-DORI ICHIHARA-SHI
          CHIBA- KEN, 290-0067 JAPAN
          ATTENTION: MARKETING GROUP
          TELEPHONE: 0436-43-8611
          TELECOPY: 0436-41-3511

          If to WESTERN DIGITAL:

          Western Digital Technologies, Inc.
          20511 Lake Forest Drive
          Lake Forest, California 92630
          Attn: General Counsel
          Telephone: 949-672-7000
          Telecopy: 949-672-5444

15.  FORCE MAJEURE. Neither Party to this Agreement shall be liable for its
     failure to perform any of its obligations hereunder, or for its failure to
     cure any default under this Agreement, during any period in which such
     performance or cure is delayed or prevented by war, embargo, riot, or any
     other acts of god beyond the control of such party; provided that such
     party shall immediately notify the other party in writing of the reasons
     for the delay and, if possible, the duration of such delay.

16.  SEVERABILITY. In the event that any provision of this Agreement is
     determined to be invalid or unenforceable under applicable law, the
     validity of the remaining portions of this Agreement shall be unaffected
     and shall continue in full force and effect.

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17.  COMPLIANCE WITH LAWS.

          17.1 Compliance. All Products supplied and work performed under this
     Agreement will comply with all applicable Japanese and U.S. governmental
     laws and regulations in effect, including the Japanese and U.S. Export
     Administration Regulations, and other agencies or departments of Japanese
     and U.S. government. Each party to this Agreement will comply with all
     applicable export, re-export and foreign policy controls and restrictions
     imposed by the U.S., Japan and the country in which they are located. The
     parties to this Agreement may not export, re-export or allow to be
     disclosed, any technical data received from any party hereto or the product
     of any technical data to any person or destination to the extent prohibited
     by law.

          17.2 Foreign Corrupt Practices Act. SHOWA DENKO shall take no action
     which, if taken by or with the knowledge of WESTERN DIGITAL, could be
     construed as or constitute a violation of the United States Foreign Corrupt
     Practices Act. SHOWA DENKO shall not, directly or indirectly, offer, pay,
     promise to pay, or authorize the payment of any money or offer, give,
     promise to give, or authorize the giving of anything of value (i) to any
     official of the government of any country or any instrumentality thereof,
     or (ii) to any person, while knowing or having reason to know that all or a
     portion of such money or thing of value will be offered, given or promised
     directly or indirectly to any official of the government of any country or
     any instrumentality thereof, for purposes of: (i) influencing any act or
     decision of such official in his official capacity, including a decision to
     fail to perform his official functions; or (ii) inducing such official to
     use his influence with the government of any country or instrumentality
     thereof to affect or influence any act or decision of such government or
     instrumentality, in order to obtain or retain business for or with, or
     direct business to, any person. SHOWA DENKO agrees that it will retain all
     documents and other information relating to export activities under this
     and predecessor Agreements, both written and on electronic storage media,
     for a minimum period of five (5) years, and longer if required under
     applicable law.

          17.3 Continuing Obligations. SHOWA DENKO acknowledges and agrees that
     its obligations under this Section 17 are continuing in nature and that, in
     the event of any change in any material fact from that previously
     represented to WESTERN DIGITAL in connection with these obligations, it
     will immediately notify WESTERN DIGITAL of such change.

18.  NONWAIVER. No failure or delay on the part of a party in the exercise of
     any power or right hereunder shall operate as a waiver thereof, nor shall
     any single or partial exercise of any such power or right preclude other or
     further exercise thereof or of any other right or power; provided, however,
     that a party may by a written document executed by it: (a) extend the time
     for the performance of any of the agreements or covenants of the other
     party under this Agreement; (b) waive any inaccuracies in the
     representations or warranties of the other party contained in this
     Agreement or in any document delivered pursuant hereto; (c) waive the
     performance by the other party of any of the agreements or covenants to be
     performed by the other party under this Agreement; or (d) waive the
     satisfaction of any conditions precedent to its obligations under this
     Agreement. The

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     waiver by a party of a breach of any provision of this Agreement shall not
     operate or be construed as a waiver of any other or subsequent breach
     hereunder. All rights and remedies existing under this Agreement are
     cumulative to, and not exclusive of, any rights or remedies otherwise
     available.

19.  ADVERTISING. Nothing contained in this Agreement shall be construed as
     conferring upon either party to this Agreement any right to use in
     advertising, publicity or other promotional activities any name, trade
     name, trademark or other designation of the other party hereto (including
     any contraction, abbreviation or simulation of any of the foregoing).
     Except as permitted by the NDA, each party hereto agrees not to use or
     refer to this Agreement or any provision thereof in any advertising or
     publicity without the express written approval of the other party. Neither
     party will use any trademarks, service marks, trade names, logos or other
     commercial or product designations of the other party for any purpose
     except as specifically allowed by the other party's published trademark
     guidelines or with the other party's prior written consent.

20.  APPLICABLE LAW; DISPUTE RESOLUTION.

          20.1 Governing Law and Language. The governing law of this Agreement
     shall be the substantive law of the State of California (without giving
     effect to the conflicts of law provisions thereof), as from time to time in
     force. Each party shall submit to and hereby waives any right to contest,
     the exclusive jurisdiction of the federal courts located in Los Angeles,
     California and the state courts located in Orange County, California, as
     applicable. The governing language of this Agreement shall be English and
     any translation of this Agreement shall be for convenience only and shall
     not be binding on the parties hereto. The 1980 United Nations Convention on
     Contracts for the International Sale of Goods, as amended, shall not be
     applicable to this Agreement.

          20.2 Resolution by Parties. All disputes, controversies or claims
     between or among the parties and/or any of their subsidiaries or affiliates
     arising out of, or relating to this Agreement or the breach, termination,
     invalidity or performance hereof (collectively, a "DISPUTE"), shall be
     settled, if reasonably possible, through good faith negotiations between
     the relevant parties. If a settlement is not reached within three (3)
     months, such Disputes shall be finally settled by arbitration, and such
     arbitration shall be binding upon both disputing parties. The arbitration
     shall be held in Los Angeles, California, in accordance with the
     Arbitration rules of American Arbitration Association.

21.  PERFORMANCE DURING PENDENCY OF DISPUTES. If a dispute arises between the
     parties, subject to the terms and conditions of this Agreement, (a) in no
     event nor for any reason shall SHOWA DENKO interrupt the provision of
     Products to WESTERN DIGITAL, delay manufacture or delivery of Products or
     perform any other action that prevents, slows down, or reduces in any way
     the provision of Products or WESTERN DIGITAL'S ability to conduct its
     business; and (b) each party shall continue to perform its obligations
     under this Agreement, unless: (x) authority to do so has been granted by
     the other party or conferred by a court of competent jurisdiction; or (y)
     this Agreement has been

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     terminated pursuant to Section 12.1, 12.2, 12.3 and the Final Transition
     Period has occurred.

22.  MISCELLANEOUS.

          22.1 Confidentiality. The provisions of the NDA shall apply to the
     disclosure and use of Confidential Information disclosed in connection with
     this Agreement. Further, during the term of this Agreement, the parties
     shall keep secret and confidential the content of this Agreement and shall
     not, without the prior written consent of the other party divulge it to any
     third party unless required to be disclosed by law. The parties agree that
     they shall work together to seek confidential treatment for certain
     confidential portions of this Agreement if WESTERN DIGITAL determines that
     the Agreement is required to be filed with the Securities and Exchange
     Commission.

          22.2 Binding Effect; Amendments. This Agreement will not be binding
     upon the parties until it has been signed by an authorized signatory on
     behalf of each party. No amendment or modification hereof shall be valid or
     binding upon the parties unless made in writing and signed as aforesaid.

          22.3 Headings. The headings of the several sections of this Agreement
     are inserted for convenience of reference only and are not intended to be a
     part of or to affect the meaning or interpretation of this Agreement.

          22.4 Counterparts. This Agreement may be executed in any number of
     counterparts, each of which shall be deemed an original, but all of which
     together shall constitute one and the same agreement.

          22.5 Intellectual Property Rights. This Agreement does not grant
     either party any right to the other party's patents, copyrights,
     trademarks, trade secrets, or other forms of intellectual property.
     Notwithstanding the foregoing, SHOWA DENKO grants WESTERN DIGITAL an
     irrevocable, nonexclusive, worldwide, royalty-free right to all
     intellectual property and other proprietary rights of SHOWA DENKO necessary
     to permit WESTERN DIGITAL and others authorized by WESTERN DIGITAL to use,
     have used, disseminate, sell, or distribute the Products sold by SHOWA
     DENKO hereunder.

          22.6 Complete Agreement. This Agreement supersedes all prior and
     contemporaneous agreements and representations made, whether oral or
     written, express or implied, with respect to the same subject matter and
     contains the entire agreement between the parties with respect to the
     subject matter hereof and shall not be modified except by an instrument in
     writing signed by duly authorized representatives of each party. In the
     event of any discrepancy or inconsistency between this Agreement and any
     other form, agreement or order used or proposed by either party in
     connection herewith or with the transactions contemplated herein, the terms
     of this Agreement shall govern and such other form, agreement or order
     shall be effective only to show the quantity, model, date of order and date
     of delivery.

                                       17
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          22.7 Relationship of the Parties. The relationship between the parties
     hereto is that of independent contractors, and nothing contained herein
     shall be construed as establishing a partnership or joint venture between
     the parties. No party hereto shall make any commitment, by contract or
     otherwise, binding upon the other, nor represent that it has any authority
     to do so.

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
signed by their duly authorized representatives as of the Effective Date.

                                        WESTERN DIGITAL TECHNOLOGIES, INC.

                                        By: /s/ Renate K. Quigley
                                            ------------------------------------
                                        Title: V.P. Asia Materials

                                        SHOWA DENKO K.K.

                                        By: /s/ Kenichi Izumi
                                            ------------------------------------
                                        Title: General Manager
                                               HD Division

List of Exhibits

Exhibit 3.1 "Product" definitions
Exhibit 3.2 Volume and Pricing Chart

                                       18
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                                   EXHIBIT 3.1
                                   "PRODUCTS"

     The following listed "Products" are defined for the purpose of Volume,
 [***] and Technology Exchange. All other Media subject to written proposals or
                    amendments to this table and agreement.

          1.0" Glass

          1.8" Glass

          2.5" Glass

          3.5" Aluminum

          3.0" Aluminum or Glass

                                        1
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                                   EXHIBIT 3.2

                              PRODUCT UNIT VOLUMES
                                  (IN MILLIONS)

<TABLE>
<CAPTION>
FQ2/06   FQ3/06   FQ4/06   FQ1/07   FQ2/07   FQ3/07   FQ4/07   FQ1/08   FQ2/08
------   ------   ------   ------   ------   ------   ------   ------   ------
<S>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>
 [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]
</TABLE>

*    Showa Denko agrees to use commercially reasonable efforts to increase
     volume in FQ2/06 from [***] units of Product to [***] units of Product.

Any increases in unit volumes per quarter mutually agreed to by the parties and
any additional [***] associated therewith shall be set forth in an amendment to
this Exhibit 3.2 shall be made in accordance with the Agreement and signed by
the parties.

                         WESTERN DIGITAL FISCAL QUARTERS

<TABLE>
<CAPTION>
Month                   Start Date    End Date   Weeks
-----                   ----------   ---------   -----
<S>                     <C>          <C>         <C>
FISCAL QUARTER 1 2006

July 2005               07/02/2005   07/29/05      4
August 2005             07/30/05     08/26/05      4
September 2005          08/27/05     09/30/05      5

FISCAL QUARTER 2 2006

October 2005            10/01/05     10/28/05      4
November 2005           10/29/05     11/25/05      4
December 2005           11/26/05     12/30/05      5

FISCAL QUARTER 3 2006

January 2006            12/31/05     01/27/06      4
February 2006           01/28/06     02/24/06      4
</TABLE>

                                        1
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<TABLE>
<S>                     <C>          <C>         <C>
March 2006              02/25/06     03/31/06      5

FISCAL QUARTER 4 2006

April 2006              04/01/06     04/28/06      4
May 2006                04/29/06     05/26/06      4
June 2006               05/27/06     06/30/06      5

FISCAL QUARTER 1 2007

July 2006               7/1/06       7/28/06       4
August 2006             7/29/06      8/25/06       4
September 2006          8/26/06      9/29/06       5

FISCAL QUARTER 2 2007

October 2006            9/30/06      10/27/06      4
November 2006           10/28/06     11/24/06      4
December 2006           11/25/06     12/29/06      5

FISCAL QUARTER 3 2007

January 2007            12/30/06     01/26/07      4
February 2007           01/27/07     02/26/07      4
March 2007              02/24/07     03/30/07      5

FISCAL QUARTER 4 2007

April 2008              3/31/2007    4/27/2007     4
May 2008                4/28/2007    5/25/2007     4
</TABLE>

                                        2
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<TABLE>
<S>                     <C>          <C>         <C>
June 2008               5/26/2007    6/29/2007     5
</TABLE>

                                        3
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                                   EXHIBIT 3.2
                                    CONTINUED

A. [***]. WESTERN DIGITAL shall [***] the following [***] to SHOWA DENKO ([***])
in the [***] and on the dates set forth below, or, in total of [***] to be
applied against [***] of Product in accordance with Section 1.1(b):

<TABLE>
<CAPTION>
[***] NO.    DATE   [***]
---------   -----   ------
<S>         <C>     <C>
[***]       [***]   [***]
</TABLE>

WESTERN DIGITAL may delay [***] of any [***] until SHOWA DENKO [***]. The total
[***] by SHOWA DENKO at any given time shall be called the "[***]."

B. [***] SCHEDULE. [***], SHOWA DENKO shall make [***] to WESTERN DIGITAL in the
[***] of [***] on the first business day of [***] toward the [***]; and [***]
SHOWA DENKO shall make [***] to WESTERN DIGITAL in the [***] of [***] on the
first day of each [***] (for a [***] of [***]) until the [***]. In the event the
[***], SHOWA DENKO shall immediately [***] to WESTERN DIGITAL in the [***] of
the [***].

C. [***] RESTRICTION. The parties agree that it is their mutual intent that the
[***] be used by SHOWA DENKO solely to [***], and not for SHOWA DENKO'S general
[***] purposes.

D. Upon the occurrence of any of the following events, either party may
immediately set off and recoup any debt it (including its subsidiaries or
affiliates) owes the other party (including its subsidiaries and affiliates),
regardless when payment is due, against any debt, credit or other obligation or
liability payable [***] (regardless whether such debt, obligation or liability
arose out of or relates to the Agreement:

     i)   Material Default under Section 12.1; or

     ii)  insolvency event as set forth in Section 12.2 of the Agreement; or

     iii) change in control event as set forth in Section 12.3 of the Agreement.

                                        4
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                                   EXHIBIT 3.3
                                DEVELOPMENT [***]

                          [***] WD Facility or JIT HUB
                All MEDIA shipment trays to be returned to SHOWA

                            DEVELOPMENT [***] MATRIX
                                    ([***])

<TABLE>
<S>       <C>
Samples   [***]
F         [***]
D         [***]
V         [***]
LVM       [***]
</TABLE>

    PRODUCT FAILING TO MEET GENERAL SPECIFICATIONS, MECHANICAL OR ELECTRICAL
     TESTING IS SUBJECT TO RTV FOR CREDIT OR REPLACEMENT AT WESTERN DIGITAL
                                  DISCRETION.

DEVELOPMENT SCHEDULES ARE SUBJECT TO REVISION BASED ON TECHNICAL AND OPERATIONAL
ISSUES. DETAILED SCHEDULES AND REQUIREMENTS CONCERNING SHOWA DENKO MEDIA WILL BE
 PUBLISHED TO SHOWA DENKO FOR EACH INDIVIDUAL PROGRAM AND REVISED AS REQUIRED.

                                  VOLUME [***]
                                    ([***])

<TABLE>
<CAPTION>
        FQ2/06   FQ3/06   FQ4/06   FQ1/07   FQ2/07   FQ3/07   FQ4/07   FQ1/08   FQ2/08
        ------   ------   ------   ------   ------   ------   ------   ------   ------
<S>     <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>
[***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]
[***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]
[***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]
[***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]
[***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]
[***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]
[***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]
[***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]
[***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]    [***]
</TABLE>

AL = ALUMINUM
GL = GLASS
SFF = SMALL FORM FACTOR, GLASS
TBD = [***] TO BE DETERMINED IN ACCORDANCE WITH THE TERMS SET FORTH BELOW

                                        1
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 ALL [***] FOR [***] MEDIA SHALL BE MUTUALLY AGREED BY THE PARTIES AND [***] AT
                      THE TIME OF NEGOTIATION OR PURCHASE.

  ALL [***] FOR [***] MEDIA SHALL BE IN ACCORDANCE WITH THE [***] SET FORTH IN
          SECTION 3.3(A) OF THE AGREEMENT AND IN NO EVENT SHALL [***].

                                        2

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