Document:

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                                  EXHIBIT 10.5

                               RETENTION AGREEMENT

                  THIS RETENTION AGREEMENT (the "AGREEMENT"), dated March 12,
2001, is made by and between Overland Data Inc., a California corporation having
its principal offices at 8975 Balboa Avenue, San Diego, California 92123-1599
(the "COMPANY") and Christopher Calisi ("EMPLOYEE").

                                    AGREEMENT

         WHEREAS, Employee is a key employee of the Company;

         WHEREAS, the Company considers that providing Employee with certain
employment termination benefits will operate as an incentive for Employee to
remain employed by the Company in the event of a Change of Control.

         NOW THEREFORE, to induce Employee to remain employed by the Company,
and for other good and valuable consideration, the receipt and sufficiency of
which is hereby acknowledged, the Company and Employee agree as follows:

1.       DEFINITIONS.

         1.1      "BASE SALARY" shall mean the Employee's gross annual salary at
the time of a Change of Control or the Termination Date, whichever is higher.

         1.2      "CHANGE OF CONTROL" is defined to have occurred if, and only
if, during Employee's employment:

                  (a)      any individual, partnership, firm, corporation,
association, trust, unincorporated organization or other entity or person, or
any syndicate or group deemed to be a person under Section 14(d)(2) of the
Exchange Act is or becomes the "Beneficial Owner" (as defined in Rule 13d-3 of
the General Rules and Regulations under the Exchange Act), directly or
indirectly, of securities of the Company representing 50% or more of the
combined voting power of the Company's then outstanding securities entitled to
vote in the election of directors of the Company;

                  (b)      there occurs a reorganization, merger, consolidation
or other corporate transaction involving the Company ("TRANSACTION"), in each
case, with respect to which the stockholders of the Company immediately prior to
such Transaction do not, immediately after the Transaction, own more than fifty
(50) percent of the combined voting power of the Company or other corporation
resulting from such Transaction; or

                  (c)      all or substantially all of the assets of the Company
are sold, liquidated or distributed.

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         1.3      "CAUSE" shall mean:

                  (a)      Employee's gross neglect of his duties to the
Company, where Employee has been given a reasonable opportunity to cure his
gross neglect (which reasonable opportunity must be granted during the
thirty-day period preceding termination);

                  (b)      any violation by Employee of Employee's obligations
under this Agreement or any employment agreement which Employee may have with
the Company;

                  (c)      Employee taking any role in any buy-out of the
Company without the approval of the Company's majority shareholder; or

                  (d)      Employee's commission of any act of fraud, theft or
embezzlement against the Company.

         1.4      "COMPENSATION" shall mean Base Salary plus Target Bonus.

         1.5      "RESIGNATION FOR GOOD REASON" shall mean the voluntary
resignation by Employee of his employment with the Company within two years
following a Change of Control and within three (3) months of the following Good
Reasons:

                  (a)      any reduction in Employee's Base Salary or Target
Bonus; or

                  (b)      any reduction in Employee's title; or

                  (c)      any significant reduction in Employee's
responsibilities and authority;

                  (d)      any failure by the Company to pay Employee's Base
Salary; or

                  (e)      a relocation by the Company of Employee's place of
Employment outside a fifty (50) mile radius of Employee's current place of
employment.

                  An event described in Section 1.5(a) through (e) will not
constitute Good Reason unless Employee provides written notice to the Company of
his intention to resign for Good Reason and unless the Company does not cure the
Good Reason within ten (10) days of the Company's receipt of the written notice.

         1.6      "SEVERANCE PERIOD" shall begin on the Termination Date and
extend for twelve months following the Termination Date.

         1.7      "TARGET BONUS" shall mean the variable annual compensation
represented by the percentage of Base Salary Employee is eligible to receive,
prior to a Change of Control, in the event targeted goals are achieved for the
year.

         1.8      "TERMINATION DATE" shall mean the date of termination of
Employee's employment relationship with the Company.

         1.9      "TERMINATION PAYMENTS" shall mean any payment or distribution
of Compensation or benefits made pursuant to SECTION 4.1 (a)-(c) of this
Agreement.

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2.       TITLE AND DUTIES. Employee will hold the position of President and
Chief Executive Officer. His primary duties will include such duties as are
assigned or delegated to Employee by the Company's Board of Directors. Employee
will: (i) devote his entire business time, attention, skill, and energy
exclusively to the business of the Company; (ii) use his best efforts to promote
the success of the Company's business; and (iii) cooperate fully with the Board
of Directors of the Company in the advancement of the best interests of the
Company.

3.       AT-WILL EMPLOYMENT. Employee reaffirms that Employee's employment
relationship with the Company is at-will, terminable at any time and for any
reason by either the Company or Employee. While certain paragraphs of this
Agreement describe events that could occur at a particular time in the future,
nothing in this Agreement may be construed as a guarantee of employment of any
length.

4.       TERMINATION PAYMENTS.

         4.1      If, within two (2) years immediately following a Change of
Control, Employee's employment terminates as the result of (i) termination by
the Company of Employee's employment for a reason other than Cause; or (ii)
Employee's Resignation for Good Reason

                  (a)      Employee will receive a pro-rata share of Base Salary
and accrued but unused vacation through the Termination Date, less applicable
state and federal taxes or other payroll deduction;

                  (b)      Employee is eligible for Severance under this
Agreement in a lump-sum amount equal to Base Salary plus Target Bonus,
multiplied by 2.5, less applicable state and federal taxes or other payroll
deduction;

                  (c)      If Employee elects to continue insurance coverage as
afforded to Employee according to the Consolidated Omnibus Budget Reconciliation
Act of 1985 ("COBRA"), Company will reimburse Employee the amount of the
premiums incurred by Employee during the Severance Period. Nothing in this
Agreement will extend Employee's COBRA period beyond the period allowed under
COBRA, nor is Company assuming any responsibility which Employee has for
formally electing to continue coverage;

         4.2      The payments set forth in SECTIONS 4.1(b) AND (c) above are in
exchange for, and contingent upon Employee's execution of a release of all
claims as of the Termination Date, in substantially the form attached to this
Agreement as Exhibit 1.

         4.3      If Employee's employment terminates for any reason after the
two year period immediately following a Change of Control or terminates during
that two year period for any reason other than (i) termination by the Company of
Employee's employment for a reason other than Cause; or (ii) Employee's
Resignation for Good Reason, the Company will pay Employee a pro-rata share of
Base Salary and accrued but unused vacation through the Termination Date.

         4.4      If Employee resigns his employment for Good Reasons described
in Section 1.5 (b) or (c) above, payment of the above Termination Payments is
contingent upon Employee's willingness, at the Company's request, to continuing
performing his duties on behalf of the Company in good faith for up to ninety
(90) days following the occurrence of the events

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described in these Sections 1.5 (b) and (c). Employee will continue to receive
his regular Base Salary paid according to the Company's regular payroll
practices during the up-to ninety (90) day period and will receive the
Termination Payment upon completion of that period.

5.       RETIREMENT AND PROFIT-SHARING PLANS. Notwithstanding anything in this
Agreement to the contrary, Employee's rights in any retirement, pension or
profit-sharing plans offered by the Company shall be governed by the rules of
such plans as well as by applicable law; provided, however, that on the
Termination Date, Employee shall become fully vested in all pension and 401(k)
account balances.

6.       TAX CONSEQUENCES. The Company makes no representations regarding the
tax consequence of any provision of this Agreement. Employee is advised to
consult with his own tax advisor with respect to the tax treatment of any
payment contained in this Agreement.

7.       TAX ADJUSTMENT. Notwithstanding the foregoing or any other provision of
this Agreement to the contrary, if tax counsel selected by the Company and
acceptable to Employee determines that any portion of any payment under this
Agreement would constitute an "excess parachute payment" within the meaning of
Section 280G of the Internal Revenue Code of 1986, as amended (the "Code"), the
payments to be made to Employee under this Agreement shall be reduced (but not
below zero) such that the value of the aggregate payments that Employee is
entitled to receive under this Agreement and any other agreement or plan or
program of the Company shall be one dollar ($1) less than the maximum amount of
payments which Employee may receive without becoming subject to the tax imposed
by Section 4999 of the Code.

8.       DISPUTE RESOLUTION PROCEDURES. Any dispute or claim arising out of this
agreement shall be subject to final and binding arbitration. The arbitration
will be conducted by one arbitrator who is a member of the American Arbitration
Association ("AAA") or of the Judicial Arbitration and Mediation Services
("JAMS"). The arbitration shall be held in San Diego, California. The arbitrator
shall have all authority to determine the arbitrability of any claim and enter a
final and binding judgment at the conclusion of any proceedings in respect of
the arbitration. Any final judgment only may be appealed on the grounds of
improper bias or improper conduct of the arbitrator. The parties will be
entitled to conduct discovery (i.e., investigation of facts through depositions
and other means) which shall be governed by the California Code of Civil
Procedure (the "CCP") section 1283.05. The arbitrator shall have all power and
authority to enter orders relating to such discovery as are allowed under the
CCP. The arbitrator will apply California substantive law in all respects. The
party prevailing in the resolution of any such claim will be entitled, in
addition to such other relief as may be granted, to an award of all reasonable
attorneys fees and costs incurred in pursuit of the claim, without regard to any
statute, schedule, or rule of court purported to restrict such award.

9.       GENERAL PROVISIONS.

         9.1      GOVERNING LAW. This Agreement will be governed by and
construed in accordance with the laws of California.

         9.2      ASSIGNMENT. Employee may not assign, pledge or encumber his
interest in this Agreement or any part thereof.

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         9.3      NO WAIVER OF BREACH. The failure to enforce any provision of
this Agreement will not be construed as a waiver of any such provision, nor
prevent a party from enforcing the provision or any other provision of this
Agreement. The rights granted the parties are cumulative, and the election of
one will not constitute a waiver of such party's right to assert all other legal
and equitable remedies available under the circumstances.

         9.4      SEVERABILITY. The provisions of this Agreement are severable,
and if any provision will be held to be invalid or otherwise unenforceable, in
whole or in part, the remainder of the provisions, or enforceable parts of this
Agreement, will not be affected.

         9.5      ENTIRE AGREEMENT. This Agreement constitutes the entire
agreement of the parties with respect to the subject matter of this Agreement,
and supersedes all prior and contemporaneous negotiations, agreements and
understandings between the parties, oral or written.

         9.6      MODIFICATION; WAIVERS. No modification, termination or
attempted waiver of this Agreement will be valid unless in writing, signed by
the party against whom such modification, termination or waiver is sought to be
enforced.

         9.7      FEES AND EXPENSES. If any proceeding is brought for the
enforcement or interpretation of this Agreement, or because of any alleged
dispute, breach, default or misrepresentation in connection with any provisions
of this Agreement, the successful or prevailing party will be entitled to
recover from the other party reasonable attorneys' fees and other costs incurred
in that proceeding (including, in the case of an arbitration, arbitration fees
and expenses), in addition to any other relief to which such party may be
entitled.

         9.8      AMENDMENT. This Agreement may be amended or supplemented only
by a writing signed by both of the parties hereto.

         9.9      DUPLICATE COUNTERPARTS. This Agreement may be executed in
duplicate counterparts; each of which shall be deemed an original; provided,
however, such counterparts shall together constitute only one instrument.

         9.10     INTERPRETATION. The headings contained in this Agreement are
for reference purposes only and shall not affect in any way the meaning or
interpretation of this Agreement.

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         9.11     DRAFTING AMBIGUITIES. Each party to this Agreement and its
counsel have reviewed and revised this Agreement. The rule of construction that
any ambiguities are to be resolved against the drafting party shall not be
employed in the interpretation of this Agreement or any of the amendments to
this Agreement.

                                   OVERLAND DATA, INC.

Dated:  2-21-01                    By:  /s/ Vernon A. LoForti
                                      ------------------------------------------
                                      Vernon A. LoForti,
                                      Vice President and Chief Financial Officer

Dated:  2-21-01                         /s/ Christopher Calisi
                                      ------------------------------------------
                                      Christopher Calisi

                                       6
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                                    EXHIBIT 1

                                 GENERAL RELEASE

This GENERAL RELEASE ("RELEASE") is entered into effective as of ______________,
____, (the "EFFECTIVE DATE") by and between Overland Data, Inc., a California
corporation, having its principal offices at 8975 Balboa Avenue, San Diego,
California 92123-1599 ("COMPANY") and Christopher Calisi, an individual residing
at ________________________________ ("EMPLOYEE") with reference to the following
facts:

                                    RECITALS

         A.       The parties entered into a Retention Agreement ("the
Agreement") dated March 12, 2001, by which the parties agreed that upon the
occurrence of certain conditions, Employee would become eligible for Termination
Payments as defined in the Agreement in exchange for Employee's release of the
Company from all claims which Employee may have against the Company as of the
Termination Date.

         B.       The parties desire to dispose of, fully and completely, all
claims, which Employee may have against the Company in, the manner set forth in
this Release.

                                    AGREEMENT

         1.       RELEASE. Employee, for himself and his heirs, successors and
assigns, each fully releases, and discharges Company, its officers, directors,
employees, shareholders, attorneys, accountants, other professionals, insurers
and agents of the other (collectively "Agents"), and all entities related to
each party, including, but not limited to, heirs, executors, administrators,
personal representatives, assigns, parent, subsidiary and sister corporations,
affiliates, partners and co-venturers (collectively "Related Entities"), from
all rights, claims, demands, actions, causes of action, liabilities and
obligations of every kind, nature and description whatsoever, Employee now has,
owns or holds or has at anytime had, owned or held or may have against the
Company, Agents or Related Entities from any source whatsoever, whether or not
arising from or related to the facts recited in this Release. Employee
specifically releases and waives any and all claims arising under any express or
implied contract, rule, regulation or ordinance, including, without limitation,
Title VII of the Civil Rights Act of 1964, the Civil Rights Act of 1991, the
Americans with Disabilities Act, the California Fair Employment and Housing Act,
and the Age Discrimination in Employment Act, as amended ("ADEA").

         2.       SECTION 1542 WAIVER. This Release is intended as a full and
complete release and discharge of any and all claims that Employee may have
against the Company, Agents or Related Entities. In making this release,
Employee intends to release the Company, Agents and Related Entities from
liability of any nature whatsoever for any claim of damages or injury or for
equitable or declaratory relief of any kind, whether the claim, or any facts on
which such claim might be based, is known or unknown to him. Employee expressly
waives all rights under ss.1542 of the California Civil Code, which Employee
understands provides as follows:

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                      A GENERAL RELEASE DOES NOT EXTEND TO CLAIMS WHICH THE
                      CREDITOR DOES NOT KNOW OR SUSPECT TO EXIST IN HIS FAVOR AT
                      THE TIME OF EXECUTING THE RELEASE, WHICH IF KNOWN BY HIM
                      MUST HAVE MATERIALLY AFFECTED HIS SETTLEMENT WITH THE
                      DEBTOR.

Employee acknowledges that he may discover facts different from or in addition
to those that he now believes to be true with respect to this Release. Employee
agrees that this Release shall remain effective notwithstanding the discovery of
any different or additional facts.

         3.       WAIVER OF CERTAIN CLAIMS. Employee acknowledges that he has
been advised in writing of his right to consult with an attorney prior to
executing the waivers set out in this Release, and that he has been given a
21-day period in which to consider entering into the release of ADEA claims, if
any. In addition, Employee acknowledges that he has been informed that he may
revoke a signed waiver of the ADEA claims for up to seven (7) days after
executing this Release.

         4.       NO UNDUE INFLUENCE. This Release is executed voluntarily and
without any duress or undue influence. Employee acknowledges he has read this
Release and executed it with his full and free consent. No provision of this
Release shall be construed against any party by virtue of the fact that such
party or its counsel drafted such provision or the entirety of this Release.

         5.       GOVERNING LAW. This Release is made and entered into in the
State of California and accordingly the rights and obligations of the parties
hereunder shall in all respects be construed, interpreted, enforced and governed
in accordance with the laws of the State of California as applied to contracts
entered into by and between residents of California to be wholly performed
within California.

         6.       SEVERABILITY. If any provision of this Release is held to be
invalid, void or unenforceable, the balance of the provisions of this Release
shall, nevertheless, remain in full force and effect and shall in no way be
affected, impaired or invalidated.

         7.       COUNTERPARTS. This Release may be executed simultaneously in
one or more counterparts, each of which shall be deemed an original, but all of
which together shall constitute one and the same instrument. This Release may be
executed by facsimile, with originals to follow by overnight courier.

         8.       DISPUTE RESOLUTION PROCEDURES. Any dispute or claim arising
out of this Release shall be subject to final and binding arbitration. The
arbitration will be conducted by one arbitrator who is a member of the American
Arbitration Association (AAA) or of the Judicial Arbitration and Mediation
Services (JAMS) and will be governed by the Model Employment Arbitration rules
of AAA. The arbitration shall be held in San Diego, California. The arbitrator
shall have all authority to determine the arbitrability of any claim and enter a
final and binding judgment at the conclusion of any proceedings in respect of
the arbitration. Any final judgment only may be appealed on the grounds of
improper bias or improper conduct of the arbitrator. Notwithstanding any rule of
AAA to the contrary, the parties will be entitled to conduct

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discovery (i.e. investigation of facts through depositions and other means)
which shall be governed by California Code of Civil Procedure Section 1283.05
(the "CCP"). The arbitrator shall have all power and authority to enter orders
relating to such discovery as are allowed under the CCP. The arbitrator will
apply California substantive law in all respects. The party prevailing in the
resolution of any such claim will be entitled, in addition to such other relief
as may be granted, to an award of all actual attorneys fees and costs incurred
in pursuit of the claim, without regard to any statute, schedule, or rule of
court purported to restrict such award.

         9.       ENTIRE AGREEMENT. This Agreement constitutes the entire
agreement of the parties with respect to the subject matter of this Agreement,
and supersedes all prior and contemporaneous negotiations, agreements and
understandings between the parties, oral or written.

         10.      MODIFICATION; WAIVERS. No modification, termination or
attempted waiver of this Agreement will be valid unless in writing, signed by
the party against whom such modification, termination or waiver is sought to be
enforced.

         11.      AMENDMENT. This Agreement may be amended or supplemented only
by a writing signed by Employee and the Company.

Dated:
      ------------------------------------  ------------------------------------
                                            Christopher Calisi

                                       3<PAGE>

                                  EXHIBIT 10.6

                               OVERLAND DATA, INC.

                             2000 STOCK OPTION PLAN

                          NOTICE OF STOCK OPTION AWARD

         Grantee's Name and Address:
                                          --------------------------------------

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

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

         You have been granted an option (an "OPTION") to purchase shares of
Common Stock, subject to the terms and conditions of this Notice of Stock Option
Award (this "NOTICE"), the Overland Data, Inc. 2000 Stock Option Plan, as
amended from time to time (the "PLAN") and the Stock Option Award Agreement (the
"OPTION AGREEMENT") attached as EXHIBIT A hereto. If this is Grantee's first
stock option under the Plan, a copy of the Plan is attached hereto as EXHIBIT B.
Unless otherwise defined herein, the terms defined in the Plan shall have the
same defined meanings in this Notice.

         Date of Award:
                                            ------------------------------------
         Exercise Price per Share:          $
                                            ------------------------------------
         Total Number of Shares
         Subject to this Option:
                                            ------------------------------------
         Type of Option:                              Incentive Stock Option
                                            ---------

                                                      Non-Qualified Stock Option
                                            ---------

         Expiration Date:
                                            ------------------------------------
         Post-Termination Exercise Period:           Thirty (30) Days

VESTING SCHEDULE:

         Subject to Grantee's Continuous Service and other limitations set forth
in this Notice, the Plan and the Option Agreement, this Option may be exercised,
in whole or in part, in accordance with the following schedule:

                 One-third (1/3) of the Shares subject to this Option shall vest
                 twelve (12) months after the Date of Award, and 1/36 of the
                 Shares subject to this Option shall vest on each monthly
                 anniversary of the Date of Award thereafter.

<PAGE>

         IN WITNESS WHEREOF, the Company and the Grantee have executed this
Notice and agree that this Option is to be governed by the terms and conditions
of this Notice, the Plan and the Option Agreement.

                                     OVERLAND DATA, INC.,
                                     a California corporation

                                     By:
                                        ----------------------------------------
                                        Vernon A. LoForti
                                        Vice President & Chief Financial Officer

THE GRANTEE ACKNOWLEDGES AND AGREES THAT THE SHARES SUBJECT TO THIS OPTION SHALL
VEST, IF AT ALL, ONLY DURING THE PERIOD OF THE GRANTEE'S CONTINUOUS SERVICE (NOT
THROUGH THE ACT OF BEING HIRED, BEING GRANTED THIS OPTION OR ACQUIRING SHARES
HEREUNDER). THE GRANTEE FURTHER ACKNOWLEDGES AND AGREES THAT NOTHING IN THIS
NOTICE, THE OPTION AGREEMENT, OR THE PLAN SHALL CONFER UPON THE GRANTEE ANY
RIGHT WITH RESPECT TO FUTURE AWARDS OR CONTINUATION OF GRANTEE'S CONTINUOUS
SERVICE, NOR SHALL IT INTERFERE IN ANY WAY WITH THE GRANTEE'S RIGHT OR THE RIGHT
OF THE GRANTEE'S EMPLOYER TO TERMINATE GRANTEE'S CONTINUOUS SERVICE, WITH OR
WITHOUT CAUSE, AND WITH OR WITHOUT NOTICE. THE GRANTEE ACKNOWLEDGES THAT UNLESS
THE GRANTEE HAS A WRITTEN EMPLOYMENT AGREEMENT WITH THE COMPANY TO THE CONTRARY,
GRANTEE'S STATUS IS AT WILL.

         The Grantee acknowledges receipt of a copy of the Plan and the Option
Agreement, and represents that he or she is familiar with the terms and
provisions thereof, and hereby accepts this Option subject to all of the terms
and provisions hereof and thereof. The Grantee has reviewed this Notice, the
Plan and the Option Agreement in their entirety, has had an opportunity to
obtain the advice of counsel prior to executing this Notice, and fully
understands all provisions of this Notice, the Plan and the Option Agreement.
The Grantee hereby agrees that all disputes arising out of or relating to this
Notice, the Plan and the Option Agreement shall be resolved in accordance with
SECTION 13 of the Option Agreement. The Grantee further agrees to notify the
Company upon any change in the residence address indicated in this Notice.

Dated:                                 Signed:
       ---------------------                  ----------------------------------
                                                     Grantee's signature

                                       Printed name:
                                                    ----------------------------

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                                    EXHIBIT A

                               OVERLAND DATA, INC.

                             2000 STOCK OPTION PLAN

                           STOCK OPTION AWARD AGREEMENT

         1.       GRANT OF OPTION. Overland Data, Inc., a California corporation
(the "COMPANY"), hereby grants to the Grantee (the "GRANTEE") named in this
Notice of Stock Option Award (the "NOTICE"), an option (the "OPTION") to
purchase the Total Number of Shares of Common Stock subject to this Option (the
"SHARES") set forth in this Notice, at the Exercise Price per Share set forth in
this Notice (the "EXERCISE PRICE") subject to the terms and provisions of this
Notice, this Stock Option Award Agreement (the "OPTION AGREEMENT") and the
Company's 2000 Stock Option Plan, as amended from time to time (the "PLAN"),
which are incorporated herein by reference. Unless otherwise defined herein, the
terms defined in the Plan shall have the same defined meanings in this Option
Agreement.

         If designated in this Notice as an Incentive Stock Option, this Option
is intended to qualify as an Incentive Stock Option as defined in SECTION 422 of
the Code. However, notwithstanding such designation, to the extent that the
aggregate Fair Market Value of Shares subject to Options designated as Incentive
Stock Options which become exercisable for the first time by the Grantee during
any calendar year (under all plans of the Company or any Parent or Subsidiary)
exceeds $100,000, such excess Options, to the extent of the Shares covered
thereby in excess of the foregoing limitation, shall be treated as Non-Qualified
Stock Options. For this purpose, Incentive Stock Options shall be taken into
account in the order in which they were granted, and the Fair Market Value of
the Shares shall be determined as of the date this Option with respect to such
Shares is awarded.

         2.       EXERCISE OF OPTION.

                  (a)      RIGHT TO EXERCISE. This Option shall be exercisable
during its term in accordance with the Vesting Schedule set out in this Notice
and with the applicable provisions of the Plan and this Option Agreement. This
Option shall be subject to the provisions of SECTION 11 of the Plan relating to
the exercisability or termination of this Option in the event of a Corporate
Transaction, Change in Control or Related Entity Disposition. The Grantee shall
be subject to reasonable limitations on the number of requested exercises during
any monthly or weekly period as determined by the Administrator. In no event
shall the Company issue fractional Shares.

                  (b)      METHOD OF EXERCISE. This Option shall be exercisable
only by delivery of an Exercise Notice (attached as Appendix A) which shall
state the election to exercise this Option, the whole number of Shares in
respect of which this Option is being exercised, such other representations and
agreements as to the holder's investment intent with respect to such Shares and
such other provisions as may be required by the Administrator. The Exercise
Notice shall be signed by the Grantee and shall be delivered in person, by
certified mail, or by such other method as determined from time to time by the
Administrator to the Company accompanied by payment of the Exercise Price. This
Option shall be deemed to be exercised upon receipt by the

<PAGE>

Company of such written notice accompanied by the Exercise Price, which, to the
extent selected, shall be deemed to be satisfied by use of the broker-dealer
sale and remittance procedure to pay the Exercise Price provided in SECTION
3(d), below.

                  (c)      TAXES. No Shares will be delivered to the Grantee or
other person pursuant to the exercise of this Option until the Grantee or other
person has made arrangements acceptable to the Administrator for the
satisfaction of applicable income tax, employment tax, and social security tax
withholding obligations, including, without limitation, obligations incident to
the receipt of Shares or the disqualifying disposition of Shares received on
exercise of an Incentive Stock Option. Upon exercise of this Option, the Company
or the Grantee's employer may offset or withhold (from any amount owed by the
Company or the Grantee's employer to the Grantee) or collect from the Grantee or
other person an amount sufficient to satisfy such tax obligations and/or the
employer's withholding obligations.

         3.       METHOD OF PAYMENT. Payment of the Exercise Price shall be by
any of the following, or a combination thereof, at the election of the Grantee;
PROVIDED, HOWEVER, that such exercise method does not then violate any

Applicable Law:

                  (a)      check;

                  (b)      money order;

                  (c)      surrender of Shares or delivery of a properly
executed form of attestation of ownership of Shares as the Administrator may
require (including withholding of Shares otherwise deliverable upon exercise of
this Option) which have a Fair Market Value on the date of surrender or
attestation equal to the aggregate Exercise Price of the Shares as to which this
Option is being exercised [(but only to the extent that such exercise of this
Option would not result in an accounting compensation charge with respect to the
Shares used to pay the exercise price);

                  (d)      payment through a broker-dealer sale and remittance
procedure pursuant to which the Grantee (i) shall provide written instructions
to a Company designated brokerage firm to effect the immediate sale of some or
all of the purchased Shares and remit to the Company, out of the sale proceeds
available on the settlement date, sufficient funds to cover the aggregate
exercise price payable for the purchased Shares and (ii) shall provide written
directives to the Company to deliver the certificates for the purchased Shares
directly to such brokerage firm in order to complete the sale transaction.

         4.       RESTRICTIONS ON EXERCISE. This Option may not be exercised if
the issuance of the Shares subject to this Option upon such exercise would
constitute a violation of any Applicable Laws. In addition, this Option, if an
Incentive Stock Option, may not be exercised until such time as the Plan has
been approved by the shareholders of the Company.

         5.       TERMINATION OR CHANGE OF CONTINUOUS SERVICE. In the event the
Grantee's Continuous Service terminates, the Grantee may, to the extent
otherwise so entitled at the date of such termination (the "TERMINATION DATE"),
exercise this Option during the Post-Termination Exercise Period; provided,
however, in the event Grantee's Continuous Service terminates during a trading
blackout period as outlined in the Company's Insider Trading Policy, the
Post-

                                       2
<PAGE>

Termination Exercise Period will commence immediately after the trading blackout
period has ended. In no event shall this Option be exercised later than the
Expiration Date set forth in this Notice. In the event of the Grantee's change
in status from Employee, Director or Consultant to any other status of Employee,
Director or Consultant, this Option shall remain in effect and, except to the
extent otherwise determined by the Administrator, continue to vest; PROVIDED,
HOWEVER, that with respect to any Incentive Stock Option that shall remain in
effect after a change in status from Employee to Director or Consultant, such
Incentive Stock Option shall cease to be treated as an Incentive Stock Option
and shall be treated as a Non-Qualified Stock Option on the day three (3) months
and one (1) day following such change in status. Except as provided in SECTIONS
6 and 7 below, to the extent that the Grantee is not entitled to exercise this
Option on the Termination Date, or if the Grantee does not exercise this Option
within the Post-Termination Exercise Period, this Option shall terminate.

         6.       DISABILITY OF GRANTEE. In the event the Grantee's Continuous
Service terminates as a result of his or her Disability, the Grantee may, but
only within twelve (12) months from the Termination Date (and in no event later
than the Expiration Date), exercise this Option to the extent he or she was
otherwise entitled to exercise it on the Termination Date; PROVIDED, HOWEVER,
that if such Disability is not a "disability" as such term is defined in SECTION
22(e)(3) of the Code and this Option is an Incentive Stock Option, such
Incentive Stock Option shall cease to be treated as an Incentive Stock Option
and shall be treated as a Non-Qualified Stock Option on the day three (3) months
and one (1) day following the Termination Date. To the extent that the Grantee
is not entitled to exercise this Option on the Termination Date, or if the
Grantee does not exercise this Option to the extent so entitled within the time
specified herein, this Option shall terminate.

         7.       DEATH OF GRANTEE. In the event of the termination of the
Grantee's Continuous Service as a result of his or her death, or in the event of
the Grantee's death during the Post-Termination Exercise Period or during the
twelve (12) month period following the Grantee's termination of Continuous
Service as a result of his or her Disability, the Grantee's estate, or a person
who acquired the right to exercise this Option by bequest or inheritance, may
exercise this Option, but only to the extent the Grantee could exercise this
Option at the date of termination, within twelve (12) months from the date of
death (but in no event later than the Expiration Date). To the extent that the
Grantee is not entitled to exercise this Option on the date of death, or if this
Option is not exercised to the extent so entitled within the time specified
herein, this Option shall terminate.

         8.       CHANGE OF CONTROL. In the event of a Change in Control (as
defined below), each Option which is at the time outstanding under the Agreement
automatically shall become fully vested and exercisable and be released from any
restrictions on transfer (other than transfer restrictions applicable to
Options) and repurchase or forfeiture rights, immediately prior to the specified
effective date of such Change in Control, for all of the Option Shares at the
time represented by such Option. Effective upon the consummation of such Change
in Control, all outstanding Options under the Agreement shall terminate.
However, all such Options shall not terminate if the Options are, in connection
with such Change in Control, assumed by the successor corporation or its parent
corporation thereof.

                                       3
<PAGE>

                  As used in this subsection, "CHANGE IN CONTROL" means any of
the following transactions to which the Company is a party:

                           (i)      a merger or consolidation in which the
Company is not the surviving entity, except for a transaction the principal
purpose of which is to change the state in which the Company is incorporated;

                           (ii)     the sale, transfer or other disposition of
all or substantially all of the assets of the Company (including the capital
stock of the Company's subsidiary corporations);

                           (iii)    approval by the Company's shareholders of
any plan or proposal for the complete liquidation or dissolution of the Company;

                           (iv)     any reverse merger in which the Company is
the surviving entity but in which securities possessing more than fifty percent
(50%) of the total combined voting power of the Company's outstanding securities
are transferred to a person or persons different from those who held such
securities immediately prior to such merger; or

                           (v)      acquisition by any person or related group
of persons (other than the Company or by a Company-sponsored employee benefit
plan) of beneficial ownership (within the meaning of Rule 13d-3 of the Exchange
Act) of securities possessing more than fifty percent (50%) of the total
combined voting power of the Company's outstanding securities, but excluding any
such transaction that the Committee determines shall not be a Change in Control.

         9.       TRANSFERABILITY OF OPTION. This Option, if an Incentive Stock
Option, may not be transferred in any manner other than by will or by the laws
of descent and distribution and may be exercised during the lifetime of the
Grantee only by the Grantee; PROVIDED, HOWEVER, that the Grantee may designate a
beneficiary of the Grantee's Incentive Stock Option in the event of the
Grantee's death on a beneficiary designation form provided by the Administrator.
This Option, if a Non-Qualified Stock Option may be transferred to any person by
will and by the laws of descent and distribution. Non-Qualified Stock Options
also may be transferred during the lifetime of the Grantee by gift and pursuant
to a domestic relations order to members of the Grantee's Immediate Family to
the extent and in the manner determined by the Administrator. The terms of this
Option shall be binding upon the executors, administrators, heirs, successors
and transferees of the Grantee.

         10.      TERM OF OPTION. This Option may be exercised no later than the
Expiration Date set forth in this Notice or such earlier date as otherwise
provided herein.

         11.      TAX CONSEQUENCES. Set forth below is a brief summary as of the
date of this Option Agreement of some of the federal tax consequences of
exercise of this Option and disposition of the Shares. THIS SUMMARY IS
NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO CHANGE.
THE GRANTEE SHOULD CONSULT A TAX ADVISER BEFORE EXERCISING THIS OPTION OR
DISPOSING OF THE SHARES.

                                       4
<PAGE>

                  (a)      EXERCISE OF INCENTIVE STOCK OPTION. If this Option
qualifies as an Incentive Stock Option, there will be no regular federal income
tax liability upon the exercise of this Option, although the excess, if any, of
the Fair Market Value of the Shares on the date of exercise over the Exercise
Price will be treated as income for purposes of the alternative minimum tax for
federal tax purposes and may subject the Grantee to the alternative minimum tax
in the year of exercise.

                  (b)      EXERCISE OF INCENTIVE STOCK OPTION FOLLOWING
DISABILITY. If the Grantee's Continuous Service terminates as a result of
Disability that is not total and permanent disability as defined in SECTION
22(e)(3) of the Code, to the extent permitted on the date of termination, the
Grantee must exercise an Incentive Stock Option within three (3) months of such
termination for the Incentive Stock Option to be qualified as an Incentive Stock
Option.

                  (c)      EXERCISE OF NON-QUALIFIED STOCK OPTION. On exercise
of a Non-Qualified Stock Option, the Grantee will be treated as having received
compensation income (taxable at ordinary income tax rates) equal to the excess,
if any, of the Fair Market Value of the Shares on the date of exercise over the
Exercise Price. If the Grantee is an Employee or a former Employee, the Company
will be required to withhold from the Grantee's compensation or collect from the
Grantee and pay to the applicable taxing authorities an amount in cash equal to
a percentage of this compensation income at the time of exercise, and may refuse
to honor the exercise and refuse to deliver Shares if such withholding amounts
are not delivered at the time of exercise.

                  (d)      DISPOSITION OF SHARES. In the case of a Non-Qualified
Stock Option, if Shares are held for more than one year, any gain realized on
disposition of the Shares will be treated as long-term capital gain for federal
income tax purposes and subject to tax at a maximum rate of 20%. In the case of
an Incentive Stock Option, if Shares transferred pursuant to this Option are
held for more than one year after receipt of the Shares and are disposed more
than two years after the Date of Award, any gain realized on disposition of the
Shares also will be treated as capital gain for federal income tax purposes and
subject to the same tax rates and holding periods that apply to Shares acquired
upon exercise of a Non-Qualified Stock Option. If Shares purchased under an
Incentive Stock Option are disposed of prior to the expiration of such one-year
or two-year periods, any gain realized on such disposition will be treated as
compensation income (taxable at ordinary income rates) to the extent of the
difference between the Exercise Price and the lesser of (i) the Fair Market
Value of the Shares on the date of exercise, or (ii) the sale price of the
Shares.

         12.      ENTIRE AGREEMENT: GOVERNING LAW. This Notice, the Plan and
this Option Agreement constitute the entire agreement of the parties with
respect to the subject matter hereof and supersede in their entirety all prior
undertakings and agreements of the Company and the Grantee with respect to the
subject matter hereof, and may not be modified adversely to the Grantee's
interest except by means of a writing signed by the Company and the Grantee.
Nothing in this Notice, the Plan and this Option Agreement (except as expressly
provided therein) is intended to confer any rights or remedies on any persons
other than the parties. This Notice, the Plan and this Option Agreement are to
be construed in accordance with and governed by the internal laws of the State
of California (as permitted by SECTION 1646.5 of the California Civil Code, or
any similar successor provision) without giving effect to any choice of law rule
that would cause the

                                       5
<PAGE>

application of the laws of any jurisdiction other than the internal laws of the
State of California to the rights and duties of the parties. Should any
provision of this Notice, the Plan or this Option Agreement be determined by a
court of law to be illegal or unenforceable, such provision shall be enforced to
the fullest extent allowed by law and the other provisions shall nevertheless
remain effective and shall remain enforceable.

         13.      HEADINGS. The captions used in this Notice and this Option
Agreement are inserted for convenience and shall not be deemed a part of this
Option for construction or interpretation.

         14.      DISPUTE RESOLUTION. The provisions of this SECTION 13 shall be
the exclusive means of resolving disputes arising out of or relating to this
Notice, the Plan and this Option Agreement. The Company, the Grantee, and the
Grantee's assignees pursuant to SECTION 8 (the "parties") shall attempt in good
faith to resolve any disputes arising out of or relating to this Notice, the
Plan and this Option Agreement by negotiation between individuals who have
authority to settle the controversy. Negotiations shall be commenced by either
party by notice of a written statement of the party's position and the name and
title of the individual who will represent the party. Within thirty (30) days of
the written notification, the parties shall meet at a mutually acceptable time
and place, and thereafter as often as they reasonably deem necessary, to resolve
the dispute. If the dispute has not been resolved by negotiation, the parties
agree that any suit, action, or proceeding arising out of or relating to this
Notice, the Plan or this Option Agreement shall be brought in the United States
District Court for the Southern District of California (or should such court
lack jurisdiction to hear such action, suit or proceeding, in a California state
court in the County of San Diego) and that the parties shall submit to the
jurisdiction of such court. The parties irrevocably waive, to the fullest extent
permitted by law, any objection the party may have to the laying of venue for
any such suit, action or proceeding brought in such court. THE PARTIES ALSO
EXPRESSLY WAIVE ANY RIGHT THEY HAVE OR MAY HAVE TO A JURY TRIAL OF ANY SUCH
SUIT, ACTION OR PROCEEDING. If any one or more provisions of this SECTION 13
shall for any reason be held invalid or unenforceable, it is the specific intent
of the parties that such provisions shall be modified to the minimum extent
necessary to make it or its application valid and enforceable.

         15.      NOTICES. Any notice required or permitted hereunder shall be
given in writing and shall be deemed effectively given upon personal delivery or
upon deposit in the United States mail by certified mail (if the parties are
within the United States) or upon deposit for delivery by an internationally
recognized express mail courier service (for international delivery of notice),
with postage and fees prepaid, addressed to the other party at its address as
shown beneath its signature in this Notice, or to such other address as such
party may designate in writing from time to time to the other party.

                                       6
<PAGE>

                                   APPENDIX A
                                 EXERCISE NOTICE
                        OVERLAND DATA, INC. STOCK OPTIONS

                                 (PLEASE PRINT)

DATE:                         SOCIAL SECURITY # OF OPTIONEE:
     ------------------------                               --------------------

NAME OF OPTIONEE:
                 ---------------------------------------------------------------

ADDRESS OF OPTIONEE:
                    ------------------------------------------------------------

PHONE # OF OPTIONEE:                         FAX # OF OPTIONEE:
                    ------------------------                   -----------------

                 **********************************************

EFFECTIVE TODAY, THE UNDERSIGNED HEREBY ELECTS TO EXERCISE HIS/HER OPTION TO
PURCHASE SHARES OF COMMON STOCK OF OVERLAND DATA, INC. GRANTED PURSUANT TO THE
OPTION PLAN INDICATED BELOW AND THE NOTICE OF STOCK OPTION AWARD AND/OR STOCK
OPTION AWARD AGREEMENT, IN ACCORDANCE WITH THE INFORMATION SET FORTH BELOW AND
ON THE ATTACHED TWO PAGES.

NUMBER OF OPTIONS TO BE EXERCISED:                     OPTION PLAN:
                                  -------------------              -------------
OPTION PRICE PER SHARE: $
                        ------------
                  A.  OPTION COST:   $
                                     ----------------
                  B.  TAXES DUE:     $               (IF NON-QUAL/NON-STATUTORY)
                                     ----------------
                  TOTAL (A + B):     $
                                     ----------------
                  CHECK TRANSACTION  --  WIRE TRANSACTION -- OTHER  (CIRCLE ONE)

NUMBER OF OPTIONS TO BE EXERCISED:                    OPTION PLAN:
                                  -------------------             --------------
OPTION PRICE PER SHARE:  $
                         ------------
                  A.  OPTION COST:   $
                                     ---------------
                  B.  TAXES DUE:     $               (IF NON-QUAL/NON-STATUTORY)
                                     ---------------
                  TOTAL (A + B):     $
                                     ---------------
                  CHECK TRANSACTION  --  WIRE TRANSACTION -- OTHER  (CIRCLE ONE)

                  *********************************************
TRADE INSTRUCTIONS:

         I WISH TO EXERCISE ALL OF THE ABOVE OPTIONS UPON ACCEPTANCE OF MY
-----    REQUEST AND I WOULD LIKE THE FOLLOWING CERTIFICATE(S) ISSUED IN THE
         FOLLOWING DENOMINATION(S), ISSUED IN THE FOLLOWING NAME(S), AND SENT TO
         THE FOLLOWING ADDRESS(S):
                                  ----------------------------------------------

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

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

         I WISH TO EXERCISE ALL OF THE ABOVE OPTIONS UPON ACCEPTANCE OF MY
-----    REQUEST AND I WOULD LIKE THE TRANSACTION TO BE HANDLED THROUGH THE
         FOLLOWING BROKER/AGENT.

         MY ACCOUNT NUMBER IS:
                              --------------------------------------------------
         BROKER / CONTACT NAME:
                               -------------------------------------------------

         ADDRESS:
                 ---------------------------------------------------------------

         PHONE #:                             FAX #:
                 ---------------------------        ----------------------------

ADDITIONAL INSTRUCTIONS, IF ANY:
                                ------------------------------------------------

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

                                                   -----------------------------
                                  PAGE 1 OF 3         SIGNATURE OF OPTIONEE
<PAGE>

                           EXERCISE NOTICE (CONTINUED)

         1.       EXERCISE OF OPTION. Effective today, the undersigned (referred
to as "Grantee" or "Optionee") hereby elects to exercise the Grantee's option to
purchase shares of the Common Stock (the "SHARES") of Overland Data, Inc. (the
"COMPANY") under and pursuant to the Stock Option Plan (the "Plan") shown on the
face hereof and the Notice of Stock Option Award (the "NOTICE") and/or the Stock
Option Award Agreement (the "OPTION AGREEMENT"). Unless otherwise defined
herein, the terms defined in the Plan shall have the same defined meanings in
this Exercise Notice.

         2.       REPRESENTATIONS OF THE GRANTEE. The Grantee acknowledges that
the Grantee has received, read and understood this Exercise Notice, the Plan,
the Notice and/or the Option Agreement and agrees to abide by and be bound by
their terms and conditions.

         3.       RIGHTS AS SHAREHOLDER. Until the stock certificate evidencing
such Shares is issued (as evidenced by the appropriate entry on the books of the
Company or of a duly authorized transfer agent of the Company), no right to vote
or receive dividends or any other rights as a shareholder shall exist with
respect to the Shares, notwithstanding the exercise of this Option. The Company
shall issue (or cause to be issued) such stock certificate promptly after this
Option is exercised. No adjustment will be made for a dividend or other right
for which the record date is prior to the date the stock certificate is issued,
except as provided in the Plan.

         4.       DELIVERY OF PAYMENT. The Grantee herewith delivers to the
Company the full Exercise Price for the Shares, which, to the extent selected,
shall be deemed to be satisfied by use of the broker-dealer sale and remittance
procedure to pay the Exercise Price provided in the Option Agreement.

         5.       TAX CONSULTATION. The Grantee understands that the Grantee may
suffer adverse tax consequences as a result of the Grantee's purchase or
disposition of the Shares. The Grantee represents that the Grantee has consulted
with any tax consultants the Grantee deems advisable in connection with the
purchase or disposition of the Shares and that the Grantee is not relying on the
Company for any tax advice.

         6.       TAXES. The Grantee agrees to satisfy all applicable federal,
state and local income and employment tax withholding obligations and herewith
delivers to the Company the full amount of such obligations or has made
arrangements acceptable to the Company to satisfy such obligations. In the case
of an Incentive Stock Option, the Grantee also agrees, as partial consideration
for the designation of this Option as an Incentive Stock Option, to notify the
Company in writing within thirty (30) days of any disposition of any shares
acquired by exercise of this Option if such disposition occurs within two (2)
years from the Date of Award or within one (1) year from the date the Shares
were transferred to the Grantee. If the Company is required to satisfy any
federal, state or local income or employment tax withholding obligations as a
result of such an early disposition, the Grantee agrees to satisfy the amount of
such withholding in a manner that the Administrator prescribes

                                  PAGE 2 OF 3
<PAGE>

         7.       SUCCESSORS AND ASSIGNS. The Company may assign any of its
rights under this Exercise Notice to single or multiple assignees, and this
agreement shall inure to the benefit of the successors and assigns of the
Company. This Exercise Notice shall be binding upon the Grantee and his or her
heirs, executors, administrators, successors and assigns.

         8.       HEADINGS. The captions used in this Exercise Notice are
inserted for convenience and shall not be deemed a part of this agreement for
construction or interpretation.

         9.       DISPUTE RESOLUTION. The provisions of the Option Agreement
shall be the exclusive means of resolving disputes arising out of or relating to
this Exercise Notice.

         10.      GOVERNING LAW; SEVERABILITY. This Exercise Notice is to be
construed in accordance with and governed by the internal laws of the State of
California (as permitted by Section 1646.5 of the California Civil Code, or any
similar successor provision) without giving effect to any choice of law rule
that would cause the application of the laws of any jurisdiction other than the
internal laws of the State of California to the rights and duties of the
parties. Should any provision of this Exercise Notice be determined by a court
of law to be illegal or unenforceable, such provision shall be enforced to the
fullest extent allowed by law and the other provisions shall nevertheless remain
effective and shall remain enforceable.

         11.      NOTICES. Any notice required or permitted hereunder shall be
given in writing and shall be deemed effectively given upon personal delivery or
upon deposit in the United States mail by certified mail, (if the parties are
within the United States) or upon deposit for delivery by an internationally
recognized express mail courier service (for international delivery of notice)
with postage and fees prepaid, addressed to the other party at its address of
record, or to such other address as such party may designate in writing from
time to time to the other party.

         12.      FURTHER INSTRUMENTS. The parties agree to execute such further
instruments and to take such further action as may be reasonably necessary to
carry out the purposes and intent of this agreement.

         13.      ENTIRE AGREEMENT. The Plan, the Notice and/or the Option
Agreement are incorporated herein by reference, and together with this Exercise
Notice constitute the entire agreement of the parties with respect to the
subject matter hereof and supersede in their entirety all prior undertakings and
agreements of the Company and the Grantee with respect to the subject matter
hereof, and may not be modified adversely to the Grantee's interest except by
means of a writing signed by the Company and the Grantee. Nothing in the Plan,
the Notice, and/or the Option Agreement and this Exercise Notice (except as
expressly provided therein) is intended to confer any rights or remedies on any
persons other than the parties.

                                  PAGE 3 OF 3

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