Document:

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                                                                     Exhibit 4.2

COMMON STOCK                      [adic logo]                    COMMON STOCK
NUMBER                                                           SHARES
AD
                  ADVANCED DIGITAL INFORMATION CORPORATION     CUSIP 007525 10 8
          INCORPORATED UNDER THE LAWS OF THE STATE OF WASHINGTON     SEE REVERSE
                                                                     FOR CERTAIN
                                                                     DEFINITIONS
THIS CERTIFIES THAT

IS THE OWNER OF

   FULLY PAID AND NON-ASSESSABLE SHARES OF THE COMMON STOCK, NO PAR VALUE, OF

ADVANCED DIGITAL INFORMATION CORPORATION, transferable on the books of the
Corporation by the holder hereof in person or by duly authorized attorney upon
surrender of this Certificate properly endorsed. This certificate is not valid
unless countersigned and registered by the Transfer Agent and Registrar.

     Witness the facsimile signature of its duly authorized officers.

Dated

 /s/ Peter H. van Oppen      [CORPORATE           /s/  Charles H. Stonecipher
     Chairman                   SEAL]                  Secretary

                                       COUNTERSIGNED AND REGISTERED
                                       AMERICAN STOCK TRANSFER & TRUST COMPANY
                                       (NEW YORK, N.Y.)
                                       TRANSFER AGENT AND REGISTRAR

                                       AUTHORIZED OFFICER

                                       BANKNOTE CORPORATION OF AMERICA
<PAGE>
                    ADVANCED DIGITAL INFORMATION CORPORATION

     This certificate evidences shares of Common Stock of the corporation. Other
classes of shares of the corporation are or may in the future be authorized, and
those classes may consist of one or more series of shares, each with different
rights, preferences and  limitations. The corporation will furnish any
shareholder, upon request and without charge, a full statement of the powers,
designations, preferences and relative, participating, optional or other
special rights of each class of stock or series thereof and the qualifications,
limitations or restrictions of such preferences and/or rights.

     THIS CERTIFICATE ALSO EVIDENCES AND ENTITLES THE HOLDER HEREOF TO CERTAIN
RIGHTS AS SET FORTH IN THE RIGHTS AGREEMENT DATED AS OF AUGUST 12, 1996, AS IT
MAY BE AMENDED FROM TIME TO TIME (THE "RIGHTS AGREEMENT"), BETWEEN ADVANCED
DIGITAL INFORMATION CORPORATION ("ADIC") AND CHASEMELLON SHAREHOLDER SERVICES,
L.L.C., AS RIGHTS AGENT (OR BETWEEN ADIC AND ANY SUCCESSOR RIGHTS AGENT UNDER
THE RIGHTS AGREEMENT), THE TERMS OF WHICH ARE HEREBY INCORPORATED HEREIN BY
REFERENCE AND A COPY OF WHICH IS ON FILE AT THE PRINCIPAL EXECUTIVE OFFICES OF
ADIC. UNDER CERTAIN CIRCUMSTANCES, AS SET FORTH IN THE RIGHTS AGREEMENT, SUCH
RIGHTS WILL BE EVIDENCED BY SEPARATE CERTIFICATES AND WILL NO LONGER BE
EVIDENCED BY THIS CERTIFICATE. ADIC WILL MAIL TO THE HOLDER OF THIS CERTIFICATE
A COPY OF THE RIGHTS AGREEMENT WITHOUT CHARGE AFTER RECEIPT OF A WRITTEN REQUEST
THEREFOR. RIGHTS BENEFICIALLY OWNED BY ACQUIRING PERSONS OR THEIR AFFILIATES OR
ASSOCIATES THEREOF (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT) AND BY
ANY SUBSEQUENT HOLDER OF SUCH RIGHTS ARE NULL AND VOID AND NONTRANSFERABLE.

      The following abbreviations, when used in the inscription on the face of
this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations.

 TEN COM - as tenants in common     UNIF GIFT MIN ACT  --------Custodian--------
                                                   (Cust)               (Minor)
 TEN ENT - as tenants by the entireties          under Uniform Gifts to Minors
 JT  TEN - as joint tenants with
           the right of                          Act -------------------------
           survivorship and not                            (State)
           as tenants in common

Additional abbreviations may also be used though not in the above list.

For Value Received, ---------------------------------- hereby sell, assign and
transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
IDENTIFYING NUMBER OF ASSIGNEE

--------------------------------------------------------------------------------
  PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE

--------------------------------------------------------------------------------

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------------------------------------------------------------------------- Shares
of the Common Stock represented by the within Stock Certificate, and hereby
irrevocably constitute and appoint

----------------------------------------------------------------------- Attorney
to transfer the said stock on the books of the said Corporation with full power
substitution in the premises.

Dated ------------                      ----------------------------------------
                                        NOTE: The signature to this assignment
                                        must correspond with the name as written
                                        upon the face of the Certificate, in
Signature(s) Guaranteed                 every particular, without alteration or
                                        enlargement or any change whatever.
                                        Signature must be guaranteed.

By---------------------------------------------------------------------------
THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION
(BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH
MEMBERSHIP IN AN APPROVED MEDALLION SIGNATURE GUARANTEE PROGRAM) PURSUANT TO
S.E.C. RULE 17AD-15.<PAGE>

                                                                    Exhibit 10.4

                                 ADIC BONUS PLAN

                   Description of Plan as of November 1, 2002

1. PURPOSE

This is a discretionary bonus plan designed to reward Team Members for the
financial success of the Company. The plan was originally adopted by the ADIC
Board of Directors on September 27, 1996, and has been modified from time to
time. The ADIC Board of Directors reserves the right to amend or terminate the
plan without notice.

2. POLICY

Based upon recommendation of the Chief Executive Officer, the ADIC Board of
Directors will approve the allocation and distribution of funds to be paid out
under the ADIC Bonus Plan. A targeted payout will be determined based upon grade
level and a pre-determined percent of base salary. At senior levels the payout
may also based upon individual performance. These targets will be reviewed
annually.

3. APPLICABILITY

The ADIC Bonus Plan applies to all Eligible Team Members as defined in Section
4.

4. DEFINITIONS

a. Eligible Team Members: Regular, non-commissioned Team Members in the United
States, working more than twenty-five hours per week are eligible. In addition,
certain non-commissioned Team Members outside of the United States may be
eligible as provided in Section 4d. Part-time employment (hours worked between
twenty-five hours and full-time) will result in prorated participation. A Team
Member whose employment is terminated for any reason prior to the date of bonus
payout forfeits all rights to receive a bonus for that fiscal year.

b. Non-commissioned: Team Members whose compensation package does not include a
sales commission plan are considered non-commissioned.

c. Commissioned: Team Members whose compensation package includes a sales
commission plan. ADIC reserves the right to include specifically identified
commissioned Team Members for participation in the ADIC Bonus Plan.

d. Non-commissioned Team Members outside the United States are eligible to
participate in the ADIC Bonus Plan if expressly so provided in a Collective
Agreement or other agreement with such Team Member.
<PAGE>
5. PROCEDURE

a. The Team Member's annual salary in effect on the last day of the fiscal year
will be used to calculate the bonus.

b. In order to receive any payout of the ADIC Bonus Plan the Team Member must be
employed on the actual date of the payout of the bonus. Typically, any bonus
would be paid mid-December.

c. Team Member participation in the ADIC Bonus Plan will be based upon the
length of service during the current fiscal year (i.e., prorated for mid-year
hires, leaves of absence, etc.).

d. Distribution will be calculated by multiplying the maximum amount a Team
Member would be entitled to receive (based on salary, target payout percentage,
and applying any applicable prorations) by the level to which the established
goals have been achieved, as determined in the sole discretion of the ADIC Board
of Directors (e.g. full goal achievement would be 100%; partial goal achievement
would be a lesser percentage).

e. Any bonus will be paid in cash and will be taxable according to IRS
regulations. Currently, the tax rate is 28% and any payment will be subject to
applicable deductions including current 401(k) and/or ADIC Stock Purchase Plan
elections.

f. Typically, the ADIC Bonus Plan will be funded based upon meeting or exceeding
corporate profit or other financial goals approved by the ADIC Board of
Directors. The ADIC Board of Directors reserves the right at any time to modify
such goals and/or to amend or terminate the ADIC Bonus Plan without notice.

g. The ADIC Board of Directors may, but is not required to, specify threshold
levels of goal achievement that must be attained before any Bonus Plan payouts
are made to members of senior management. In addition, targeted payouts for ADIC
senior management may also be based upon individual performance.

h. Targeted Bonus Plan payout percentages are 8% of annual salary (excluding
overtime) for hourly Team Members, range from 9% to 40% of annual salary for
most salaried Team Members and range from 50% to 100% for executive officers.

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