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                                                                    EXHIBIT 10.6

                           INVESTORS' RIGHTS AGREEMENT

         This Investors' Rights Agreement (this "AGREEMENT") is made and entered
into as of November 25, 1998 by and among Chaparral Technologies, Inc., a
Delaware corporation (the "COMPANY"), the individuals and entities listed on
Exhibit A attached hereto (the "INVESTORS"), and, for purposes of Section 1.3(b)
only, those stockholders of the Company listed on Exhibit B attached hereto (the
"STOCKHOLDERS").

         A. The Investors have agreed to purchase from the Company, and the
Company has agreed to sell to the Investors, shares of the Company's Series A
Preferred Stock ("SERIES A STOCK") on the terms and conditions set forth in that
certain Series A Preferred Stock Purchase Agreement, dated July 10, 1998 by and
between the Company and certain of the Investors (the "PURCHASE AGREEMENT"),
and/or shares of the Company's Series B Preferred Stock ("SERIES B STOCK") on
the terms and conditions set forth in that certain Asset Acquisition Agreement
(the "ACQUISITION AGREEMENT"), dated of even date herewith by and between the
Company and certain of the Investors.

         B. The Purchase Agreement and the Acquisition Agreement provide that
the Investors shall be granted certain information and registration rights and
rights of first refusal, and the Warrant provides that Grayson shall be granted
certain registration rights, all as more fully set forth herein.

         NOW, THEREFORE, in consideration of the foregoing recitals and the
mutual promises hereinafter set forth, the parties hereto agree as follows:

         1.       INFORMATION RIGHTS.

                  1.1 Financial Information. The Company covenants and agrees
that, commencing on the date of this Agreement, for so long as any Investor
holds shares of Series A Stock issued under the Purchase Agreement and/or shares
of Series B Stock issued under the Acquisition Agreement and/or the equivalent
number (on an as-converted basis) of shares of Common Stock of the Company
("COMPANY STOCK") issued upon the conversion of such shares of Series A Stock or
Series B Stock ("CONVERSION STOCK") the Company will:

                           (a) Annual Reports. Furnish to such Investor, as soon
as practicable and in any event within 120 days after the end of each fiscal
year of the Company, a consolidated Balance Sheet as of the end of such fiscal
year, a consolidated Statement of Income and a consolidated Statement of Cash
Flows of the Company and its subsidiaries for such year, setting forth in each
case in comparative form the figures from the Company's previous fiscal year (if
any), all prepared in accordance with generally accepted accounting principles
and practices and audited by an independent certified public accounting firm;
and

                           (b) Quarterly Reports. Furnish to such Investor as
soon as practicable, and in any case within forty-five (45) days after the end
of each fiscal quarter of the Company (except the last quarter of the Company's
fiscal year), quarterly unaudited financial statements, including an unaudited
Balance Sheet, an unaudited Statement of Income and an unaudited Statement of
Cash Flows, together with a comparison to the Company's operating plan and
budget and statements of



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the Chief Financial Officer of the Company explaining any significant
differences in the statements from the Company's operating plan and budget for
the period and stating that such statements fairly present the consolidated
financial position and consolidated financial results of the Company for the
fiscal quarter covered.

Each Investor agrees to hold all information received pursuant to this Section
in confidence, and not to use or disclose any of such information to any third
party, except to the extent such information may be made publicly available by
the Company.

                  1.2 Inspection Rights. The Company shall permit each Investor
holding shares of Series A Stock and/or Series B Stock and/or the equivalent
number (on an as-converted basis) of shares of Conversion Stock, or any
combination thereof, at such Investor's expense, to visit and inspect the
Company's properties, to examine its books of account and records and to discuss
the Company's affairs, finances and accounts with its officers, all at such
reasonable times as may be requested by such Investor. Each Investor agrees to
hold all information received from such inspections in confidence, and not to
use or disclose any of such information to any third party, except to the extent
such information may be made publicly available by the Company.

                  1.3 Board Rights. The Company shall permit Adaptec to have one
(1) representative attend all meetings of the Company's Board of Directors in a
non-voting observer capacity and to receive any communications directed to
members of the Board of Directors in their capacity as such. The Investors agree
to hold all information received from such meetings in confidence, and not to
use or disclose any of such information to any third party, except to the extent
such information may be made publicly available by the Company.

                  1.4 Termination of Certain Rights. The Company's obligations
under Sections 1.1, 1.2 and 1.3 above will terminate upon the closing of the
Company's initial public offering of Common Stock pursuant to an effective
registration statement filed under the U.S. Securities Act of 1933, as amended
(the "SECURITIES ACT"), in which the gross proceeds raised for the Company's
account (calculated before deduction of underwriters' discounts and omissions)
exceeds $15,000,000 at a price greater than $1.10 per share of Common Stock
(such price to be proportionally adjusted to reflect stock splits, stock
dividends and the like).

         2.       REGISTRATION RIGHTS.

                  2.1      Definitions.  For purposes of this Section 2:

                           (a) Registration. The terms "REGISTER,"
"REGISTRATION" and "REGISTERED" refer to a registration effected by preparing,
and filing a registration statement in compliance with the Securities Act, and
the declaration or ordering of effectiveness of such registration statement.

                           (b) Registrable Securities. The term "REGISTRABLE
SECURITIES" means: (i) all the shares of Common Stock of the Company issued or
issuable upon the conversion of any shares of Series A Stock that are now owned
or may hereafter be acquired by the Investors or the Investors' permitted
successors and assigns and (ii) any shares of Common Stock of the Company issued
as (or issuable upon the conversion or exercise of any warrant, right or other
security which

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is issued as) a dividend or other distribution with respect to, or in exchange
for or in replacement of, all such shares of Common Stock described in clause
(i) of this subsection (b); excluding, in all cases, however, any Registrable
Securities sold by a person in a transaction in which rights under this Section
2 are not assigned in accordance with this Agreement or any Registrable
Securities sold to the public or sold pursuant to Rule 144 promulgated under the
Securities Act.

                           (c) Registrable Securities Then Outstanding. The
number of shares of "REGISTRABLE SECURITIES THEN OUTSTANDING" shall mean the
number of shares of Common Stock which are Registrable Securities and (i) are
then issued and outstanding or (ii) are then issuable pursuant to the exercise
or conversion of then outstanding and then exercisable options, warrants or
convertible securities.

                           (d) Holder. For purposes of this Section 2 and
Sections 3 and 4 hereof, the term "HOLDER" means any person owning of record
Registrable Securities that have not been sold to the public or pursuant to Rule
144 promulgated under the Securities Act or any assignee of record of such
Registrable Securities to whom rights under such Sections have been duly
assigned in accordance with this Agreement; provided, however, that for purposes
of this Agreement, a record holder of the Warrant or shares of Series A Stock or
Series B Stock convertible into such Registrable Securities shall be deemed to
be the Holder of such Registrable Securities; and provided, further, that the
Company shall in no event be obligated to register the Warrant or shares of
Series A Stock or Series B Stock, and that Holders of Registrable Securities
will not be required to convert the Warrant or their shares of Series A Stock or
Series B Stock into Common Stock in order to exercise the registration rights
granted hereunder, until immediately before the closing of the offering to which
the registration relates.

                           (e) Form S-3. The term "FORM S-3" means such form
under the Securities Act as is in effect on the date hereof or any successor
registration form under the Securities Act subsequently adopted by the SEC which
permits inclusion or incorporation of substantial information by reference to
other documents filed by the Company with the SEC.

                           (f) SEC. The term "SEC" or "COMMISSION" means the
U.S. Securities and Exchange Commission.

                  2.2      Demand Registration.

                           (a) Request by Holders. If the Company shall receive
at any time after six (6) months after the effective date of the Company's
initial public offering of its securities pursuant to a registration filed under
the Securities Act, a written request from the Holders of at least two-thirds of
the Registrable Securities then outstanding that the Company file a registration
statement under the Securities Act covering the registration of Registrable
Securities pursuant to this Section 2.2, then the Company shall, within twenty
(20) days after the receipt of such written request, give written notice of such
request ("REQUEST NOTICE") to all Holders, and effect, as soon as practicable,
the registration under the Securities Act of all Registrable Securities which
Holders request to be registered and included in such registration by written
notice given by such Holders to the Company within twenty (20) days after
receipt of the Request Notice, subject only to the limitations of this Section
2; provided that the Registrable Securities requested by all Holders to be


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registered pursuant to such request must be at least twenty-five percent (25%)
of all Registrable Securities then outstanding.

                           (b) Underwriting. If the Holders initiating the
registration request under this Section 2.2 ("INITIATING HOLDERS") intend to
distribute the Registrable Securities covered by their request by means of an
underwriting, then they shall so advise the Company as a part of their request
made pursuant to this Section 2.2 and the Company shall include such information
in the written notice referred to in subsection 2.2(a). In such event, the right
of any Holder to include his Registrable Securities in such registration shall
be conditioned upon such Holder's participation in such underwriting and the
inclusion of such Holder's Registrable Securities in the underwriting (unless
otherwise mutually agreed by a majority in interest of the Initiating Holders
and such Holder) to the extent provided herein. All Holders proposing to
distribute their securities through such underwriting shall enter into an
underwriting agreement in customary form with the managing underwriter or
underwriters selected for such underwriting by the Company. Notwithstanding any
other provision of this Section 2.2, if the underwriter(s) advise(s) the Company
in writing that marketing factors require a limitation of the number of
securities to be underwritten then the Company shall so advise all Holders of
Registrable Securities that would otherwise be registered and underwritten
pursuant hereto, and the number of Registrable Securities that may be included
in the underwriting shall be reduced as required by the underwriter(s) and
allocated among the Holders of Registrable Securities on a pro rata basis
according to the number of Registrable Securities then outstanding held by each
Holder requesting registration (including the Initiating Holders); provided,
however, that the number of shares of Registrable Securities to be included in
such underwriting and registration shall not be reduced unless all other
securities of the Company are first entirely excluded from the underwriting and
registration. Any Registrable Securities excluded and withdrawn from such
underwriting shall be withdrawn from the registration.

                           (c) Maximum Number of Demand Registrations. The
Company is obligated to effect only two (2) such registrations pursuant to this
Section 2.2.

                           (d) Deferral. Notwithstanding the foregoing, if the
Company shall furnish to Holders requesting the filing of a registration
statement pursuant to this Section 2.2, a certificate signed by the President or
Chief Executive Officer of the Company stating that in the good faith judgment
of the Board of Directors of the Company, it would be seriously detrimental to
the Company and its stockholders for such registration statement to be filed and
it is therefore essential to defer the filing of such registration statement,
then the Company shall have the right to defer such filing for a period of not
more than 120 days after receipt of the request of the Initiating Holders;
provided, however, that the Company may not utilize this right more than once in
any twelve (12) month period.

                           (e) Expenses. All expenses incurred in connection
with a registration pursuant to this Section 2.2, including without limitation
all registration and qualification fees, printers' and accounting fees, fees and
disbursements of counsel for the Company, and the reasonable fees and
disbursements of one counsel for the selling Holders (but excluding
underwriters' discounts and commissions), shall be borne by the Company. Each
Holder participating in a registration pursuant to this Section 2.2 shall bear
such Holder's proportionate share (based on the total number of shares sold in
such registration other than for the account of the Company) of all discounts,


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commissions or other amounts payable to underwriters or brokers in connection
with such offering. Notwithstanding the foregoing, the Company shall not be
required to pay for any expenses of any registration proceeding begun pursuant
to this Section 2.2 if the registration request is subsequently withdrawn at the
request of the Holders of a majority of the Registrable Securities to be
registered, unless the Holders of a majority of the Registrable Securities then
outstanding are to forfeit their right to one (1) demand registration pursuant
to this Section 2.2 (in which case such right shall be forfeited by all Holders
of Registrable Securities); provided, further, however, that if at the time of
such withdrawal, the Holders have learned of a material adverse change in the
condition, business, or prospects of the Company not known to the Holders at the
time of their request for such registration and have withdrawn their request for
registration with reasonable promptness after learning of such material adverse
change, then the Holders shall not be required to pay any of such expenses and
shall retain their rights pursuant to this Section 2.2.

                  2.3 Piggyback Registrations. The Company shall notify all
Holders of Registrable Securities in writing at least thirty (30) days prior to
filing any registration statement under the Securities Act for purposes of
effecting a public offering of securities of the Company (including, but not
limited to, registration statements relating to secondary offerings of
securities of the Company, but excluding registration statements relating to any
registration under Section 2.2 or Section 2.4 of this Agreement or to any
employee benefit plan or a corporate reorganization) and will afford each such
Holder an opportunity to include in such registration statement all or any part
of the Registrable Securities then held by such Holder. Each Holder desiring to
include in any such registration statement all or any part of the Registrable
Securities held by such Holder shall, within twenty (20) days after receipt of
the above-described notice from the Company, so notify the Company in writing,
and in such notice shall inform the Company of the number of Registrable
Securities such Holder wishes to include in such registration statement. If a
Holder decides not to include all of its Registrable Securities in any
registration statement thereafter filed by the Company, such Holder shall
nevertheless continue to have the right to include any Registrable Securities in
any subsequent registration statement or registration statements as may be filed
by the Company with respect to offerings of its securities, all upon the terms
and conditions set forth herein.

                           (a) Underwriting. If a registration statement under
which the Company gives notice under this Section 2.3 is for an underwritten
offering, then the Company shall so advise the Holders of Registrable
Securities. In such event, the right of any such Holder's Registrable Securities
to be included in a registration pursuant to this Section 2.3 shall be
conditioned upon such Holder's participation in such underwriting and the
inclusion of such Holder's Registrable Securities in the underwriting to the
extent provided herein. All Holders proposing to distribute their Registrable
Securities through such underwriting shall enter into an underwriting agreement
in customary form with the managing underwriter or underwriter(s) selected for
such underwriting. Notwithstanding any other provision of tills Agreement, if
the managing underwriter determine(s) in good faith that marketing factors
require a limitation of the number of shares to be underwritten, then the
managing underwriter(s) may exclude shares (including Registrable Securities)
from the registration and the underwriting, and the number of shares that may be
included in the registration and the underwriting shall be allocated, first, to
stockholders exercising any demand registration rights, second to the Company,
and third, to each of the Holders requesting inclusion of their Registrable
Securities in such registration statement on a pro rata basis based on the total
number of Registrable Securities then held by each such Holder; provided,
however, that the right of the


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underwriters to exclude shares (including Registrable Securities) from the
registration and underwriting as described above shall be restricted so that:
(i) the number of Registrable Securities included in any such registration is
not reduced below twenty-five percent (25%) of the shares included in the
registration, except for a registration relating to the Company's initial public
offering or an offering solely by stockholders of the Company exercising demand
registration rights, from which all Registrable Securities may be excluded, and
(ii) all shares that are not Registrable Securities and are held by persons who
are employees or directors of the Company (or any subsidiary of the Company)
shall first be excluded from such registration and underwriting before any
Registrable Securities are so excluded. If any Holder disapproves of the terms
of any such underwriting, such Holder may elect to withdraw therefrom by written
notice to the Company and the underwriter, delivered at least twenty (20) days
prior to the effective date of the registration statement. Any Registrable
Securities excluded or withdrawn from such underwriting shall be excluded and
withdrawn from the registration. For any Holder that is a partnership or
corporation, the partners, retired partners and stockholders of such Holder, or
the estates and family members of any such partners and retired partners and any
trusts for the benefit of any of the foregoing persons shall be deemed to be a
single "Holder," and any pro rata reduction with respect to such "Holder" shall
be based upon the aggregate amount of shares carrying registration rights owned
by all entities and individuals included in such "Holder," as defined in this
sentence.

                           (b) Expenses. All expenses incurred in connection
with a registration pursuant to this Section 2.3 (excluding underwriters' and
brokers' discounts and commissions), including, without limitation all federal
and "blue sky" registration and qualification fees, printers' and accounting,
fees, fees and disbursements of counsel for the Company and reasonable fees and
disbursements of one counsel for the selling Holders shall be borne by the
Company.

                  2.4 Form S-3 Registration. In case the Company shall receive
from any Holder or Holders of at least twenty-five percent (25%) of all
Registrable Securities then outstanding a written request or requests that the
Company effect a registration on Form S-3 and any related qualification or
compliance with respect to all or a part of the Registrable Securities owned by
such Holder or Holders, then the Company will:

                           (a) Notice. Promptly give written notice of the
proposed registration and the Holder's or Holders' request therefor, and any
related qualification or compliance, to all other Holders of Registrable
Securities; and

                           (b) Registration. As soon as practicable, effect such
registration and all such qualifications and compliances as may be so requested
and as would permit or facilitate the sale and distribution of all or such
portion of such Holder's or Holders' Registrable Securities as are specified in
such request, together with all or such portion of the Registrable Securities of
any other Holder or Holders joining in such request as are specified in a
written request given within twenty (20) days after receipt of such written
notice from the Company; provided, however, that the Company shall not be
obligated to effect any such registration, qualification or compliance pursuant
to this Section 2.4:

                                    (i) if Form S-3 is not available for such
offering;

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                                    (ii) if the Holders, together with the
holders of any other securities of the Company entitled to inclusion in such
registration, propose to sell Registrable Securities and such other securities
(if any) at an aggregate price to the public of less than $1,000,000;

                                    (iii) if the Company shall furnish to the
Holders a certificate signed by the President or Chief Executive Officer of the
Company stating that in the good faith judgment of the Board of Directors of the
Company, it would be seriously detrimental to the Company and its stockholders
for such Form S-3 Registration to be effected at such time, in which event the
Company shall have the right to defer the filing of the Form S-3 registration
statement no more than once during any twelve month period for a period of not
more than 120 days after receipt of the request of the Holder or Holders under
this Section 2.4;

                                    (iv) if the Company has, within the twelve
(12) month period preceding the date of such request, already effected two (2)
registrations on Form S-3 for the Holders pursuant to this Section 2.4; or

                                    (v) in any particular jurisdiction in which
the Company would be required to qualify to do business or to execute a general
consent to service of process in effecting such registration, qualification or
compliance.

                           (c) Expenses. Subject to the foregoing, the Company
shall file a, Form S-3 registration statement covering the Registrable
Securities and other securities so requested to be registered pursuant to this
Section 2.4 as soon as practicable after receipt of the request or requests of
the Holders for such registration. The Company shall pay all expenses incurred
in connection with each registration requested pursuant to this Section 2.4,
(excluding underwriters' or brokers' discounts and commissions), including
without limitation all filing, registration and qualification, printers' and
accounting fees and the reasonable fees and disbursements of one counsel for the
selling Holder or Holders and counsel for the Company.

                           (d) Not Demand Registration. Form S-3 registrations
shall not be deemed to be demand registrations as described in Section 2.2
above.

                  2.5 Obligations of the Company. Whenever required to effect
the registration of any Registrable Securities under this Agreement, the Company
shall, as expeditiously as reasonably possible:

                           (a) Prepare and file with the SEC a registration
statement with respect to such Registrable Securities and use reasonable,
diligent efforts to cause such registration statement to become effective, and,
upon the request of the Holders of a majority of tile Registrable Securities
registered thereunder, keep such registration statement effective for up to
ninety (90) days.

                           (b) Prepare and file with the SEC such amendments and
supplements to such registration statement and the prospectus used in connection
with such registration statement as may be necessary to comply with the
provisions of the Securities Act with respect to the disposition of all
securities covered by such registration statement.


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                           (c) Furnish to the Holders such number of copies of a
prospectus, including a preliminary prospectus, in conformity with the
requirements of the Securities Act, and such other documents as they may
reasonably request in order to facilitate the disposition of the Registrable
Securities owned by them that are included in such registration.

                           (d) Use reasonable, diligent efforts to register and
qualify the securities covered by such registration statement under such other
securities or Blue Sky laws of such jurisdictions as shall be reasonably
requested by the Holders, provided that the Company shall not be required in
connection therewith or as a condition thereto to qualify to do business or to
file a general consent to service of process in any such states or
jurisdictions.

                           (e) In the event of any underwritten public offering,
enter into and perform its obligations under all underwriting agreement, in
usual and customary form, with the managing underwriter(s) of such offering.
Each Holder participating in such underwriting shall also enter into and perform
its obligations under such an agreement.

                           (f) Notify each Holder of Registrable Securities
covered by such registration statement at any time when a prospectus relating
thereto is required to be delivered under the Securities Act of the happening of
any event as a result of which the prospectus included in such registration
statement, as then in effect, includes an untrue statement of a material fact or
omits to state a material fact required to be stated therein or necessary to
make the statements therein not misleading in the light of the circumstances
then existing.

                           (g) Furnish, at the request of any Holder requesting
registration of Registrable Securities, on the date that such Registrable
Securities are delivered to the underwriters for sale, if such securities are
being sold through underwriters, or, if such securities are not being sold
through underwriters, on the date that the registration statement with respect
to such securities becomes effective, (i) an opinion, dated as of such date, of
the counsel representing the Company for the purposes of such registration, in
form and substance as is customarily given to underwriters in an underwritten
public offering and reasonably satisfactory to a majority in interest of the
Holders requesting registration, addressed to the underwriters, if any, and to
the Holders requesting registration of Registrable Securities and (ii) a
"comfort" letter dated as of such date, from the independent certified public
accountants of the Company, in form and substance as is customarily given by
independent certified public accountants to underwriters in an underwritten
public offering and reasonably satisfactory to a majority in interest of the
Holders requesting registration, addressed to the underwriters, if any, and to
the Holders requesting registration of Registrable Securities.

                  2.6 Furnish Information. It shall be a condition precedent to
the obligations of the Company to take any action pursuant to Sections 2.2, 2.3
or 2.4 that the selling Holders shall furnish to the Company such information
regarding themselves, the Registrable Securities held by them, and the intended
method of disposition of such securities as shall be required to timely effect
the registration of their Registrable Securities.

                  2.7 Delay of Registration. No Holder shall have any right to
obtain or seek an injunction restraining or otherwise delaying any such
registration as the result of any controversy that might arise with respect to
the interpretation or implementation of this Section 2.


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                  2.8 Indemnification. In the event any Registrable Securities
are included in a registration statement under Sections 2.2, 2.3 or 2.4:

                           (a) By the Company. To the extent permitted by law,
the Company will indemnify and hold harmless each Holder, the partners, officers
and directors of each Holder, any underwriter (as defined in the Securities Act)
for such Holder and each person, if any, who controls such Holder or underwriter
within the meaning of the Securities Act or the Securities Exchange Act of 1934,
as amended, (the "1934 ACT"), against any losses, claims, damages, or
liabilities (joint or several) to which they may become subject under the
Securities Act, the 1934 Act or other federal or state law, insofar as such
losses, claims, damages, or liabilities (or actions in respect thereof) arise
out of or are based upon any of the following statements, omissions or
violations (collectively, "VIOLATIONS" and, individually, a "VIOLATION"):

                                    (i)     any untrue statement or alleged
untrue statement of a material fact contained in such registration statement,
including any preliminary prospectus or final prospectus contained therein or
any amendments or supplements thereto;

                                    (ii)    the omission or alleged omission to
state therein a material fact required to be stated therein, or necessary to
make the statements therein not misleading, or

                                    (iii)   any violation or alleged violation
by the Company of the Securities Act, the 1934 Act, any federal or state
securities law or any rule or regulation promulgated under the Securities Act,
the 1934 Act or any federal or state securities law in connection with the
offering covered by such registration statement;

and the Company will reimburse each such Holder, partner, officer or director,
underwriter or controlling person for any legal or other expenses reasonably
incurred by them, as incurred, in connection with investigating or defending any
such loss, claim, damage, liability or action; provided however, that the
indemnity agreement contained in this subsection 2.8(a) shall not apply to
amounts paid in settlement of any such loss, claim, damage, liability or action
if such settlement is effected without the consent of the Company (which consent
shall not be unreasonably withheld), nor shall the Company be liable in any such
case for any such loss, claim, damage, liability or action to the extent that it
arises out of or is based upon a Violation which occurs in reliance upon and in
conformity with written information furnished expressly for use in connection
with such registration by such Holder, partner, officer, director, underwriter
or controlling person of such Holder.

                           (b) By Selling Holders. To the extent permitted by
law, each selling Holder will indemnify and hold harmless the Company, each of
its directors, each of its officers who have signed the registration statement,
each person, if any, who controls the Company within the meaning of the
Securities Act, any underwriter and any other Holder selling securities under
such registration statement or any of such other Holder's partners, directors or
officers or any person who controls such Holder within the meaning of the
Securities Act or the 1934 Act, against any losses, claims, damages or
liabilities (joint or several) to which the Company or any such director,
officer, controlling person, underwriter or other such Holder, partner or
director, officer or controlling person of such other Holder may become subject
under the Securities Act, the 1934 Act or other federal or state law, insofar as
such losses, claims, damages or liabilities (or actions in respect thereto)
arise out


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of or are based upon any Violation, in each case to the extent (and only to the
extent) that such Violation occurs in reliance upon and in conformity with
written information furnished by such Holder expressly for use in connection
with such registration; and each such Holder will reimburse any legal or other
expenses reasonably incurred by the Company or any such director, officer,
controlling person, underwriter or other Holder, partner, officer, director or
controlling person of such other Holder in connection with investigating or
defending any such loss, claim, damage, liability or action; provided, however,
that the indemnity agreement contained in this subsection 2.8(b) shall not apply
to amounts paid in settlement of any such loss, claim, damage, liability or
action if such settlement is effected without the consent of the Holder, which
consent shall not be unreasonably withheld; and provided further, that the total
amounts payable in indemnity by a Holder under this Section 2.8(b) in respect of
any Violation shall not exceed the net proceeds received by such Holder in the
registered offering out of which such Violation arises.

                           (c) Notice. Promptly after receipt by an indemnified
party under this Section 2.8 of notice of the commencement of any action
(including any governmental action), such indemnified party will, if a claim in
respect thereof is to be made against any indemnifying party under this Section
2.8, deliver to the indemnifying party a written notice of the commencement
thereof and the indemnifying party shall have the right to participate in, and,
to the extent the indemnifying party so desires, jointly with any other
indemnifying party similarly noticed, to assume the defense thereof with counsel
mutually satisfactory to the parties; provided, however, that an indemnified
party shall have the right to retain its own counsel, with the fees and expenses
to be paid by the indemnifying party, if representation of such indemnified
party by the counsel retained by the indemnifying party would be inappropriate
due to actual or potential conflict of interests between such indemnified party
and any other party represented by such counsel in such proceeding. The failure
to deliver written notice to the indemnifying party within a reasonable time of
the commencement of any such action, if prejudicial to its ability to defend
such action, shall relieve such indemnifying party of any liability to the
indemnified party under this Section 2.8, but the omission so to deliver written
notice to the indemnifying party will not relieve it of any liability that it
may have to any indemnified party otherwise than under this Section 2.8.

                           (d) Defect Eliminated in Final Prospectus. The
foregoing indemnity agreements of the Company and Holders are subject to the
condition that, insofar as they relate to any Violation made in a preliminary
prospectus but eliminated or remedied in the amended prospectus on file with the
SEC at the time the registration statement in question becomes effective or the
amended prospectus filed with the SEC pursuant to SEC Rule 424(b) (tile "FINAL
PROSPECTUS"), such indemnity agreement shall not inure to the benefit of any
person if a copy of the Final Prospectus was furnished to the indemnified party
and was not furnished to the person asserting the loss, liability, claim or
damage at or prior to the time such action is required by the Securities Act.

                           (e) Contribution. In order to provide for just and
equitable contribution to joint liability under the Securities Act in any case
in which either (i) any Holder exercising rights under this Agreement, or any
controlling person of any such Holder, makes a claim for indemnification
pursuant to this Section 2.8 but it is judicially determined (by the entry of a
final judgment or decree by a court of competent jurisdiction and the expiration
of time to appeal or the denial of the last right of appeal) that such
indemnification may not be enforced in such case notwithstanding the fact that
this Section 2.8 provides for indemnification in such case, or


                                      -10-

<PAGE>   11



(ii) contribution under the Securities Act may be required on the part of any
such selling Holder or any such controlling person in circumstances for which
indemnification is provided under this Section 2.8; then, and in each such case,
the Company and such Holder will contribute to the aggregate losses, claims,
damages or liabilities to which they may be subject (after contribution from
others) in such proportion so that such Holder is responsible for the portion
represented by the percentage that the public offering price of its Registrable
Securities offered by and sold under the registration statement bears to the
public offering price of all securities offered by and sold under such
registration statement, and the Company and other selling Holders are
responsible for the remaining portion; provided, however, that, in any such
case, (A) no such Holder will be required to contribute any amount in excess of
the public offering price of all such Registrable Securities offered and sold by
such Holder pursuant to such registration statement; and (B) no person or entity
guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of
the Securities Act) will be entitled to contribution from any person or entity
who was not guilty of such fraudulent misrepresentation.

                           (f) Survival. The obligations of the Company and
Holders under this Section 2.8 shall survive the completion of any offering of
Registrable Securities in a registration statement, and otherwise.

                  2.9 "Market Stand-Off" Agreement. Each Holder hereby agrees
that it shall not, to the extent requested by the Company or an underwriter of
securities of the Company, sell or otherwise transfer or dispose of any
Registrable Securities or other shares of stock of the Company then owned by
such Holder (other than to donees or partners of the Holder who agree to be
similarly bound) for up to one hundred eighty (180) days following the effective
date of a registration statement of the Company filed under the Securities Act;
provided, however, that:

                           (a) such agreement shall be applicable only to the
first such registration statement of the Company which covers securities to be
sold on its behalf to the public in an underwritten offering but not to
Registrable Securities sold pursuant to such registration statement; and

                           (b) all officers and directors of the Company then
holding Common Stock of the Company enter into similar agreements.

In order to enforce the foregoing covenant, the Company shall have the right to
place restrictive legends on the certificates representing the shares subject to
this Section and to impose stop transfer instructions with respect to the
Registrable Securities and such other shares of stock of each Holder (and the
shares or securities of every other person subject to the foregoing restriction)
until the end of such period.

                  2.10 Rule 144 Reporting. With a view to making available the
benefits of certain rules and regulations of the Commission which may at any
time permit the sale of the Registrable Securities to the public without
registration, after such time as a public market exists for the Common Stock of
the Company, the Company agrees to:


                                      -11-

<PAGE>   12



                           (a) Make and keep public information available, as
those terms are understood and defined in Rule 144 under the Securities Act, at
all times after the effective date of the first registration under the
Securities Act filed by the Company for an offering of its securities to the
general public;

                           (b) Use reasonable, diligent efforts to file with the
Commission in a timely manner all reports and other documents required of the
Company under the Securities Act and the 1934 Act (at any time after it has
become subject to such reporting requirements); and

                           (c) So long as a Holder owns any Registrable
Securities, to furnish to the Holder forthwith upon request a written statement
by the Company as to its compliance with the reporting requirements of said Rule
144 (at any time after ninety (90) days after the effective date of the first
registration statement filed by the Company for an offering of its securities to
the general public), and of the Securities Act and the 1934 Act (at any time
after it has become subject to the reporting requirements of the 1934 Act), a
copy of the most recent annual or quarterly report of the Company, and such
other reports and documents of the Company as a Holder may reasonably request in
availing itself of any rule or regulation of the Commission allowing a Holder to
sell any such securities without registration (at any time after the Company has
become subject to the reporting requirements of the 1934 Act).

                  2.11 Termination of the Company's Obligations. The Company
shall have no obligations pursuant to Sections 2.2 through 2.4 with respect to:
(a) any request or requests for registration made by any Holder on a date more
than five (5) years after the closing date of the Company's initial public
offering; or (b) any Registrable Securities proposed to be sold by a Holder in a
registration pursuant to Section 2.2, 2.3 or 2.4 if, in the opinion of counsel
to the Company, all such Registrable Securities proposed to be sold by a Holder
may be sold in a three-month period without registration under the Securities
Act pursuant to Rule 144 under the Securities Act.

                  2.12 Limitations on Subsequent Registration Rights. From and
after the date of this Agreement, the Company shall not, without the prior
written consent of the Holders of a majority of the Registrable Securities then
outstanding, enter into any agreement with any holder or prospective holder of
any securities of the Company which would allow such holder or prospective
holder (a) to include such securities in any registration filed under Section
2.2 hereof, unless under the terms of such agreement, such holder or prospective
holder may include such securities in any such registration only to the extent
that the inclusion of his securities will not reduce the amount of the
Registrable Securities of the Holders which is included, or (b) to make a demand
registration which could result in such registration statement being declared
effective prior to the earlier of either of the dates set forth in subsection
2.2(a), or within one hundred twenty (120) days of the effective date of any
registration effected pursuant to Section 2.2.

         3.       PRE-EMPTIVE RIGHTS.

                  3.1 General. Each Holder (as defined in Section 2.1(d)) and
any party to whom such Holder's rights under this Section 3 have been duly
assigned in accordance with Section 4.1(b) (each such Holder or assignee being
hereinafter referred to as a "RIGHTS HOLDER") has the right of first refusal to
purchase such Rights Holder's Pro Rata Share (as defined below), of all (or any
part) of


                                      -12-

<PAGE>   13



any "NEW SECURITIES" (as defined in Section 3.2) that the Company may from time
to time issue after the date of this Agreement. A Rights Holder's "PRO RATA
SHARE" for purposes of this right of first refusal is the ratio of (a) the
number of Registrable Securities as to which such Rights Holder is the Holder
(and/or is deemed to be the Holder under Section 2.1(d)), to (b) a number of
shares of Common Stock of the Company equal to the sum of (i) the total number
of shares of Common Stock of the Company then outstanding plus (ii) the total
number of shares of Common Stock of the Company into which all then outstanding
shares of Preferred Stock of the Company are then convertible.

                  3.2 New Securities. "NEW SECURITIES" shall mean any Common
Stock or Preferred Stock of the Company, whether now authorized or not, and
rights, options or warrants to purchase such Common Stock or Preferred Stock,
and securities of any type whatsoever that are, or may become, convertible or
exchangeable into such Common Stock or Preferred Stock; provided, however, that
the term "New Securities" does not include:

                           (a) up to 3,000,000 shares of the Company's Common
Stock (and/or options or warrants therefor) issued to employees, officers,
directors, contractors, advisors or consultants of the Company pursuant to
incentive agreements or plans approved by the Board of Directors of the Company;

                           (b) any shares of Series A Stock or Series B Stock
issued under the Purchase Agreement or the Acquisition Agreement, respectively,
as such agreements may be amended.

                           (c) any securities issuable upon conversion of or
with respect to any then outstanding shares of Series A Stock or Series B Stock
of the Company or Common Stock or other securities issuable upon conversion
thereof,

                           (d) any securities issuable upon exercise of any
options, warrants or rights to purchase any securities of the Company
outstanding on the date of this Agreement "WARRANT SECURITIES") and any
securities issuable upon the conversion of any Warrant Securities or upon the
exercise or conversion of any securities, if such securities were first offered
to the Rights Holders hereunder;

                           (e) shares of the Company's Common Stock or Preferred
Stock issued in connection with any stock split or stock dividend;

                           (f) securities offered by the Company to the public
pursuant to a registration statement filed under the Securities Act;

                           (g) up to 250,000 shares of the Company's Common
Stock or Preferred Stock (and/or options or warrants therefor) issued or
issuable to parties providing the Company with equipment leases, real property
leases, loans, credit lines, guaranties of indebtedness, cash price reductions
or similar financing such number of shares being subject to proportional
adjustment to reflect subdivisions, combinations and stock dividends affecting
the number of outstanding shares of such stock; or


                                      -13-

<PAGE>   14



                           (h) securities issued pursuant to the acquisition of
another corporation or entity by the Company by consolidation, merger, purchase
of all or substantially all of the assets, or other reorganization in which the
Company acquires, in a single transaction or series of related transactions, all
or substantially all of the assets of such other corporation or entity or fifty
percent (50%) or more of the voting power of such other corporation or entity or
fifty percent (50%) or more of the equity ownership of such other entity.

                  3.3 Procedures. In the event that the Company proposes to
undertake an issuance of New Securities, it shall give to each Rights Holder
written notice of its intention to issue New Securities (the "NOTICE"),
describing the type of New Securities and the price and the general terms upon
which the Company proposes to issue such New Securities. Each Rights Holder
shall have ten (10) days from the date of mailing of any such Notice to agree in
writing to purchase such Rights Holder's Pro Rata Share of such New Securities
for the price and upon the general terms specified in the Notice by giving
written notice to the Company and stating therein the quantity of New Securities
to be purchased (not to exceed such Rights Holder's Pro Rata Share). If any
Rights Holder falls to so agree in writing within such ten (10) day period to
purchase such Rights Holder's full Pro Rata Share of an offering, of New
Securities (a "NONPURCHASING HOLDER"), then such Nonpurchasing Holder shall
forfeit the right hereunder to purchase that part of his Pro Rata Share of such
New Securities that he did not so agree to purchase and the Company shall
promptly give each Rights Holder who has timely agreed to purchase his full Pro
Rata Share of such offering of New Securities (a "PURCHASING HOLDER") written
notice of the failure of any Nonpurchasing Holder to purchase such Nonpurchasing
Rights Holder's full Pro Rata Share of such offering of New Securities (the
"OVERALLOTMENT NOTICE"). Each Purchasing Holder shall have a right of
overallotment such that such Purchasing Holder may agree to purchase a portion
of the Nonpurchasing Holders' unpurchased Pro Rata Shares of such offering on a
pro rata basis according to the relative Pro Rata Shares of the Purchasing
Rights Holders, at any time within five (5) days after receiving the
Overallotment Notice.

                  3.4 Failure to Exercise. In the event that the Rights Holders
fail to exercise in full the right of first refusal within such ten (10) plus
five (5) day period, then the Company shall have 120 days thereafter to sell the
New Securities with respect to which the Rights Holders' rights of first refusal
hereunder were not exercised, at a price and upon general terms not materially
more favorable to the purchasers thereof than specified in the Company's Notice
to the Rights Holders. In the event that the Company has not issued and sold the
New Securities within such 120-day period, then the Company shall not thereafter
issue or sell any New Securities without again first offering such New
Securities to the Rights Holders pursuant to this Section 3.

                  3.5 Termination. This right of first refusal shall terminate
(a) immediately before the closing of the first underwritten sale of Common
Stock of the Company to the public pursuant to a registration statement filed
with, and declared effective by, the SEC under the Securities Act, covering the
offer and sale of Common Stock to the public at an offering price of at least
$1.10 per share (such offering price being subject to proportional adjustment to
reflect subdivisions, combinations, stock dividends and similar transactions
affecting the number of outstanding shares of Common Stock) for an aggregate
gross public offering, price (calculated before deduction of underwriters'
discounts and commissions) of at least $15,000,000 or (b) upon (i) the
acquisition of all or substantially all the assets of the Company or (ii) an
acquisition of the Company by another


                                      -14-

<PAGE>   15



corporation or entity by consolidation, merger or other reorganization in which
the holders of the Company's outstanding voting stock immediately prior to such
transaction own, immediately after such transaction, securities representing
less than fifty percent (50%) or more of the voting power of the corporation or
other entity surviving such transaction.

         4.       ASSIGNMENT AND AMENDMENT.

                  4.1 Assignment. Notwithstanding anything herein to the
contrary:

                           (a) Information Rights. The rights of an Investor
under Section 1.1 or 1.2 or 1.4 hereof may be assigned only to a party who
acquires from an Investor (or an Investor's permitted assigns) at least 500,000
shares of Series A Stock issued under the Purchase Agreement and/or Series B
Stock issued under the Acquisition Agreement and/or all equivalent number (on an
as-converted basis) of Registrable Securities issued upon conversion thereof.

                           (b) Registration Rights; Refusal Rights. The
registration rights of a Holder under Section 2 hereof and the rights of first
refusal of a Rights Holder under Section 3 hereof may be assigned only to a
party who acquires at least 500,000 shares of Series A Stock issued under the
Purchase Agreement and/or Series B Stock issued under the Acquisition Agreement
and/or an equivalent number (on an as-converted basis) of Registrable Securities
issued upon conversion thereof; provided, however that no party may be assigned
any of the foregoing rights unless the Company is given written notice by the
assigning party at the time of such assignment stating the name and address of
the assignee and identifying the securities of the Company as to which the
rights in question are being assigned; and provided further that any such
assignee shall receive such assigned rights subject to all the terms and
conditions of this Agreement, including without limitation the provisions of
this Section 4.

                  4.2 Amendment of Rights. Any provision of this Agreement may
be amended and the observance thereof may be waived (either generally or in a
particular instance and either retroactively or prospectively), only with the
written consent of the Company and Investors (and/or any of their permitted
successors or assigns) holding shares of Series A Stock, Series B Stock and/or
Conversion Stock representing and/or convertible into a majority of all the
Investors' Shares (as defined below). As used herein, the term "INVESTORS'
SHARES" shall mean the shares of Common Stock then issuable upon conversion of
all then outstanding shares of Series A Stock issued under the Purchase
Agreement and all then outstanding, shares of Series B Stock issued under the
Acquisition Agreement plus all then outstanding shares of Conversion Stock that
were issued upon the conversion of any shares of Series A Stock issued under the
Purchase Agreement and shares of Series B Stock issued under the Acquisition
Agreement. Any amendment or waiver effected in accordance with this Section 4.2
shall be binding, upon each Investor, each Holder, each permitted successor or
assignee of such Investor or Holder and the Company.

         5.       GENERAL PROVISIONS.

                  5.1 Notices. Any notice, request or other communication
required or permitted hereunder shall be in writing and shall be deemed to have
been duly given if personally delivered or


                                      -15-

<PAGE>   16



if deposited in the U.S. mail by registered or certified mail, return receipt
requested, postage prepaid, as follows:

                           (a) if to the Investors, at the addresses set forth
on Exhibit A.

                           (b) if to the Company, at 1951 S. Fordham Street,
Longmont, Colorado 90503.

                           (c) if to the Stockholders, at the addresses set
forth on Exhibit B.

Any party hereto (and such party's permitted assigns) may by notice so given
change its address for future notices hereunder. Notice shall conclusively be
deemed to have been given when personally delivered or when deposited in the
mail in the manner set forth above.

                  5.2 Entire Agreement. This Agreement, together with all the
Exhibits hereto, constitutes and contains the entire agreement and understanding
of the parties with respect to the subject matter hereof and supersedes any and
all prior negotiations, correspondence, agreements, understanding, duties or
obligations between the parties respecting the subject matter hereof

                  5.3 Governing Law. This Agreement shall be governed by and
construed exclusively in accordance with the internal laws of the State of
California as applied to agreements among California residents entered into and
to be performed entirely within California, excluding that body of law relating
to conflict of laws and choice of law.

                  5.4 Severability. If one or more provisions of this Agreement
are held to be unenforceable under applicable law, then such provision(s) shall
be excluded from this Agreement and the balance of this Agreement shall be
interpreted as if such provision(s) were so excluded and shall be enforceable in
accordance with its terms.

                  5.5 Third Parties. Nothing in this Agreement, express or
implied, is intended to confer upon any person, other than the parties hereto
and their successors and assigns, any rights or remedies under or by reason of
this Agreement.

                  5.6 Successors And Assigns. Subject to the provisions of
Section 4.1, the provisions of this Agreement shall inure to the benefit of, and
shall be binding upon, the successors and permitted assigns of the parties
hereto.

                  5.7 Captions. The captions to sections of this Agreement have
been inserted for identification and reference purposes only and shall not be
used to construe or interpret this Agreement.

                  5.8 Counterparts. This Agreement may be executed in
counterparts, each of which shall be deemed all original, but all of which
together shall constitute one and the same instrument.


                                      -16-

<PAGE>   17



                  5.9 Costs And Attorneys' Fees. In the event that any action,
suit or other proceeding is instituted concerning or arising out of this
Agreement or any transaction contemplated hereunder, the prevailing party shall
recover all of such party's costs and attorneys' fees incurred in each such
action, suit or other proceeding, including any and all appeals or petitions
therefrom.

                  5.10 Adjustments for Stock Splits, Etc. Wherever in this
Agreement there is a reference to a specific number of shares of Common Stock or
Preferred Stock of the Company of any class or series, then, upon the occurrence
of any subdivision, combination or stock dividend of such class or series of
stock, the specific number of shares so referenced in this Agreement shall
automatically be proportionally adjusted to reflect the affect on the
outstanding shares of such class or series of stock by such subdivision,
combination or stock dividend.

                  5.11 Aggregation of Stock. All shares held or acquired by
affiliated entities or persons shall be aggregated together for the purpose of
determining the availability of any rights under this Agreement.

                  5.12 Prior Registration Rights Superseded. Grayson and the
Company hereby agree that the demand and piggy-back registration rights granted
to Grayson under Sections 2.2 and 2.3 hereof shall entirely replace and
supersede any and all registration rights granted by the Company to Grayson
under the Warrant, and the Company shall have no obligation under the Warrant to
register shares issuable upon conversion of the Warrant.

                  5.13 Arbitration. Any disputes between the Company, the
Investors, the Stockholders and/or Grayson with respect to this Agreement shall
be settled by binding, final arbitration in accordance with the commercial
arbitration rules of the American Arbitration Association then in effect (the
"AAA RULES"). Any arbitration proceeding shall be conducted in Santa Clara,
California. The following arbitration provisions shall govern over any
conflicting rules which may now or hereafter be contained in the AAA Rules. Any
judgment upon the award rendered by the arbitrator may be entered in any court
having jurisdiction over the subject matter thereof. The arbitrator shall have
the authority to grant any equitable and legal remedies that would be available.

                           (a) Any such arbitration shall be conducted before a
single arbitrator who shall be compensated for his or her services at a rate to
be determined by the parties or by the American Arbitration Association, but
based upon reasonable hourly or daily consulting rates for the arbitrator in the
event the parties are not able to agree upon his or her rate of compensation.

                           (b) The AAA Rules for the selection of the arbitrator
shall be followed.

                           (c) Each party to such arbitration shall each advance
an equal portion of the initial compensation to be paid to the arbitrator in any
such arbitration and an equal portion of the costs of transcripts and other
normal and regular expenses of the arbitration proceedings; provided, however,
that the arbitrator shall have the discretion to grant to the prevailing party
in any arbitration an award of attorneys' fees and costs, and all costs of
arbitration.


                                      -17-

<PAGE>   18



                           (d) The parties shall be entitled to conduct
discovery proceedings in accordance with the provisions of the Federal Rules of
Civil Procedure, subject to any limitation imposed by the arbitrator.

                           (e) For any claim submitted to arbitration, the
burden of proof shall be as it would be if the claim were litigated in a
judicial proceedings.

                           (f) Upon the conclusion of any arbitration proceeding
hereunder, the arbitrator shall render findings of fact and conclusions of law
and a written opinion setting forth the basis and reasons for any decision
reached by him or her and shall deliver such documents to each party to this
Agreement along with a signed copy of the award.

                           (g) The arbitrator chosen in accordance with these
provisions shall not have the power to alter, amend or otherwise affect the
terms of these arbitration provisions or the provisions of this Agreement.

                           (h) The parties acknowledge that, except as
specifically provided in this Agreement, no other action need be taken by either
party before proceeding directly in accordance with the provisions of this
Section.

                           (i) The arbitration provisions set forth in this
Section 5.13 are intended by the parties to be exclusive for all purposes and
applicable to each and every controversy, dispute and/or claim in any manner
arising out of or relating to this Agreement, the meaning, application and/or
interpretation of this Agreement, any breach hereof and/or any voluntary or
involuntary termination of this Agreement with or without cause, including,
without limitation, any such controversy, dispute and/or claim which, if pursued
through any state or federal court or administrative agency, would arise at law,
in equity and/or pursuant to statutory, regulatory and/or common law rules,
regardless of whether any such dispute, controversy and/or claim would arise in
and/or from contract, tort or any other legal and/or equitable theory or basis.
The prevailing party in any action instituted pursuant to this Section 5.13(i),
or in any appeal from any arbitration conducted pursuant to this Section 5.13,
shall be entitled to recover from the other party its reasonable attorneys' fees
and other expenses incurred in such litigation.


                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK.]



                                      -18-

<PAGE>   19


         IN WITNESS WHEREOF, the parties hereto have executed this Investors'
Rights Agreement as of the date first above written.


THE COMPANY:                                 THE INVESTORS:

Chaparral Technologies, Inc.,                Adaptec, Inc.,
     a Delaware corporation                       a Delaware corporation

Name: Gary L. Allison                        Name: Lawrence Boucher
     ----------------------------------           -----------------------------

By: /s/ Gary L. Allison                      By: /s/ Lawrence Boucher
   ------------------------------------         -------------------------------

Title: Chairman of the Board and             Title: Chairman of the Board
       Chief Executive Officer                     ----------------------------
      ---------------------------------

                                             ----------------------------------
                                             William R. Childs

                                             /s/ Gary L. Allison
                                             ----------------------------------
                                             Gary L. Allison


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

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


THE STOCKHOLDERS:

/s/ Gary L. Allison                          /s/ Michael J. Gluck
---------------------------------------      ----------------------------------
Gary L. Allison                              Michael J. Gluck

/s/ Jerry L. Walker
---------------------------------------      ----------------------------------
Jerry L. Walker




                 [SIGNATURE PAGE TO INVESTORS' RIGHTS AGREEMENT]


                                      -19-