<Page>


                                  EXHIBIT 10.13

                               RETENTION AGREEMENT

                  THIS RETENTION AGREEMENT (the "AGREEMENT"), dated
_____________, 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 _____________ ("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.


<Page>

         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.


                                       2
<Page>


2. TITLE AND DUTIES. Employee will hold the position of____________________.
His primary duties will include such duties as are assigned or delegated to
Employee by the President and Chief Executive Officer of the Company (the
"PRESIDENT"). 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 President and 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, 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 SECTION 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.


                                       3
<Page>

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.

         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


                                      4
<Page>

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.

         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:                                       By:
      ------------------------------            --------------------------------
                                             Name:
                                                  ------------------------------
                                             Title:
                                                   -----------------------------

Dated:
      ------------------------------         -----------------------------------
                                             Printed Name:
                                                          ----------------------


                                       5
<Page>


                                    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 _____________________, an
individual residing at ____________________ ("EMPLOYEE") with reference to
the following facts:

                                    RECITALS

         A. The parties entered into a Retention Agreement ("the Agreement")
dated ____________, 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 Section 1542 of the California Civil Code,
which Employee understands provides as follows:


                                       1
<Page>

           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 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 Code


                                       2
<Page>

of Civil Procedure ("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. 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:
      -----------------------------       --------------------------------------
                                          Printed Name:
                                                       -------------------------



                                       3