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                                                                    EXHIBIT 10.5

                              AUSPEX SYSTEMS, INC.
                      1998 NON-STATUTORY STOCK OPTION PLAN
                            AS AMENDED JUNE 16, 1999

        1. Purposes of the Plan. The purposes of this Non-Statutory Stock Option
Plan are:

             to attract and retain the best available personnel for positions of
substantial responsibility;

             to provide additional incentive to Employees and Consultants (who
are neither Officers nor Directors); and

             to promote the success of the Company's business.

        Options granted under the Plan will be Nonstatutory Stock Options.

        2. Definitions. As used herein, the following definitions shall apply:

             (a) "Administrator" means the Board or any of its Committees as
shall be administering the Plan, in accordance with Section 4 of the Plan.

             (b) "Applicable Laws" means the requirements relating to the
administration of stock option plans under U.S. state corporate laws, U.S.
federal and state securities laws, the Code, any stock exchange or quotation
system on which the Common Stock is listed or quoted and the applicable laws of
any foreign country or jurisdiction where Options are, or will be, granted under
the Plan.

             (c) "Board" means the Board of Directors of the Company.

             (d) "Code" means the Internal Revenue Code of 1986, as amended.

             (e) "Committee" means a committee of Directors appointed by the
Board in accordance with Section 4 of the Plan.

             (f) "Common Stock" means the common stock of the Company.

             (g) "Company" means Auspex Systems, Inc., a Delaware corporation.

             (h) "Consultant" means any person, including an advisor, engaged by
the Company or a Parent or Subsidiary to render services to such entity.

             (i) "Director" means a member of the Board.

             (j) "Disability" means total and permanent disability as defined in
Section 22(e)(3) of the Code.



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             (k) "Employee" means any person employed by the Company or any
Parent or Subsidiary of the Company. An Employee shall not cease to be an
Employee in the case of (i) any leave of absence approved by the Company or (ii)
transfers between locations of the Company or between the Company, its Parent,
any Subsidiary, or any successor. Neither service as a Director nor payment of a
director's fee by the Company shall be sufficient to constitute "employment" by
the Company.

             (l) "Exchange Act" means the Securities Exchange Act of 1934, as
amended.

             (m) "Fair Market Value" means, as of any date, the value of Common
Stock determined as follows:

                    (i) If the Common Stock is listed on any established stock
exchange or a national market system, including without limitation the Nasdaq
National Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market, its
Fair Market Value shall be the closing sales price for such stock (or the
closing bid, if no sales were reported) as quoted on such exchange or system for
the last market trading day prior to the time of determination, as reported in
The Wall Street Journal or such other source as the Administrator deems
reliable;

                    (ii) If the Common Stock is regularly quoted by a recognized
securities dealer but selling prices are not reported, the Fair Market Value of
a Share of Common Stock shall be the mean between the high bid and low asked
prices for the Common Stock on the last market trading day prior to the day of
determination, as reported in The Wall Street Journal or such other source as
the Administrator deems reliable;

                    (iii) In the absence of an established market for the Common
Stock, the Fair Market Value shall be determined in good faith by the
Administrator.

             (n) "Notice of Grant" means a written or electronic notice
evidencing certain terms and conditions of an individual Option grant. The
Notice of Grant is part of the Option Agreement.

             (o) "Officer" means any Employee who is (i) an officer of the
Company pursuant to the specifications set forth in the By-Laws of the Company,
(ii) holds a position of vice-president or above, or (iii) is otherwise treated
as an officer by the Company.

             (p) "Option" means a nonstatutory stock option granted pursuant to
the Plan, that is not intended to qualify as an incentive stock option within
the meaning of Section 422 of the Code and the regulations promulgated
thereunder.

             (q) "Option Agreement" means an agreement between the Company and
an Optionee evidencing the terms and conditions of an individual Option grant.
The Option Agreement is subject to the terms and conditions of the Plan.



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             (r) "Option Exchange Program" means a program whereby outstanding
options are surrendered in exchange for options with a lower exercise price.

             (s) "Optioned Stock" means the Common Stock subject to an Option.

             (t) "Optionee" means the holder of an outstanding Option granted
under the Plan.

             (u) "Parent" means a "parent corporation," whether now or hereafter
existing, as defined in Section 424(e) of the Code.

             (v) "Plan" means this 1998 Non-Statutory Stock Option Plan.

             (w) "Share" means a share of the Common Stock, as adjusted in
accordance with Section 12 of the Plan.

             (x) "Subsidiary" means a "subsidiary corporation," whether now or
hereafter existing, as defined in Section 424(f) of the Code.

        3. Stock Subject to the Plan. Subject to the provisions of Section 12 of
the Plan, the maximum aggregate number of Shares which may be optioned and sold
under the Plan is Three Million (3,000,000) Shares. The Shares may be
authorized, but unissued, or reacquired Common Stock.

        4. Administration of the Plan.

             (a) The Plan shall be administered by (i) the Board or (ii) a
Committee, which committee shall be constituted to satisfy Applicable Laws.

             (b) Powers of the Administrator. Subject to the provisions of the
Plan, and in the case of a Committee, subject to the specific duties delegated
by the Board to such Committee, the Administrator shall have the authority, in
its discretion:

                    (i) to determine the Fair Market Value of the Common Stock;

                    (ii) to select the Employees (other than Officers and
Directors) to whom Options may be granted hereunder;

                    (iii) to determine whether and to what extent Options are
granted hereunder;

                    (iv) to determine the number of shares of Common Stock to be
covered by each Option granted hereunder;

                    (v) to approve forms of agreement for use under the Plan;



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                    (vi) to determine the terms and conditions, not inconsistent
with the terms of the Plan, of any award granted hereunder. Such terms and
conditions include, but are not limited to, the exercise price, the time or
times when Options may be exercised (which may be based on performance
criteria), any vesting acceleration or waiver of forfeiture restrictions, and
any restriction or limitation regarding any Option or the shares of Common Stock
relating thereto, based in each case on such factors as the Administrator, in
its sole discretion, shall determine;

                    (vii) to reduce the exercise price of any Option to the then
current Fair Market Value if the Fair Market Value of the Common Stock covered
by such Option shall have declined since the date the Option was granted;

                    (viii) to institute an Option Exchange Program;

                    (ix) to construe and interpret the terms of the Plan and
awards granted pursuant to the Plan;

                    (x) to modify or amend each Option (subject to Section 14(b)
of the Plan), including the discretionary authority to extend the
post-termination exercisability period of Options longer than is otherwise
provided for in the Plan;

                    (xi) to authorize any person to execute on behalf of the
Company any instrument required to effect the grant of an Option or previously
granted by the Administrator;

                    (xii) to determine the terms and restrictions applicable to
Options;

                    (xiii) to allow Optionees to satisfy withholding tax
obligations by electing to have the Company withhold from the Shares to be
issued upon exercise of an Option that number of Shares having a Fair Market
Value equal to the amount required to be withheld. The Fair Market Value of the
Shares to be withheld shall be determined on the date that the amount of tax to
be withheld is to be determined. All elections by an Optionee to have Shares
withheld for this purpose shall be made in such form and under such conditions
as the Administrator may deem necessary or advisable; and

                    (xiv) to make all other determinations deemed necessary or
advisable for administering the Plan.

             (c) Effect of Administrator's Decision. The Administrator's
decisions, determinations and interpretations shall be final and binding on all
Optionees and any other holders of Options.

        5. Eligibility. Options may be granted hereunder only to Employees and
Consultants who are neither Officers nor Directors.

        6. Limitation. Neither the Plan nor any Option shall confer upon an
Optionee any right with respect to continuing the Optionee's relationship as an
Employee with the Company, nor shall they



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interfere in any way with the Optionee's right or the Company's right to
terminate such relationship at any time, with or without cause.

        7. Term of Plan. The Plan shall become effective upon July 17, 1998. It
shall continue in effect for ten (10) years, unless sooner terminated under
Section 14 of the Plan.

        8. Term of Option. The term of each Option shall be stated in the Option
Agreement.

        9. Option Exercise Price and Consideration.

             (a) Exercise Price. The per share exercise price for the Shares to
be issued pursuant to exercise of an Option shall be determined by the
Administrator.

             (b) Waiting Period and Exercise Dates. At the time an Option is
granted, the Administrator shall fix the period within which the Option may be
exercised and shall determine any conditions which must be satisfied before the
Option may be exercised.

             (c) Form of Consideration. The Administrator shall determine the
acceptable form of consideration for exercising an Option, including the method
of payment. Such consideration may consist entirely of:

                    (i) cash;

                    (ii) check;

                    (iii) promissory note;

                    (iv) other Shares which (A) in the case of Shares acquired
upon exercise of an option, have been owned by the Optionee for more than six
months on the date of surrender, and (B) have a Fair Market Value on the date of
surrender equal to the aggregate exercise price of the Shares as to which said
Option shall be exercised;

                    (v) consideration received by the Company under a cashless
exercise program implemented by the Company in connection with the Plan;

                    (vi) such other consideration and method of payment for the
issuance of Shares to the extent permitted by Applicable Laws; or

                    (vii) any combination of the foregoing methods of payment.

        10. Exercise of Option.



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             (a) Procedure for Exercise; Rights as a Stockholder. Any Option
granted hereunder shall be exercisable according to the terms of the Plan and at
such times and under such conditions as determined by the Administrator and set
forth in the Option Agreement. An Option may not be exercised for a fraction of
a Share.

                    An Option shall be deemed exercised when the Company
receives: (i) written or electronic notice of exercise (in accordance with the
Option Agreement) from the person entitled to exercise the Option, and (ii) full
payment for the Shares with respect to which the Option is exercised. Full
payment may consist of any consideration and method of payment authorized by the
Administrator and permitted by the Option Agreement and the Plan. Shares issued
upon exercise of an Option shall be issued in the name of the Optionee or, if
requested by the Optionee, in the name of the Optionee and his or her spouse.
Until the Shares are 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 stockholder shall exist
with respect to the Optioned Stock, notwithstanding the exercise of the Option.
The Company shall issue (or cause to be issued) such Shares promptly after the
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 Shares are issued, except as
provided in Section 12 of the Plan.

                    Exercising an Option in any manner shall decrease the number
of Shares thereafter available, both for purposes of the Plan and for sale under
the Option, by the number of Shares as to which the Option is exercised.

             (b) Termination of Relationship as an Employee. If an Optionee
ceases to be a an Employee, other than upon the Optionee's death or Disability,
the Optionee may exercise his or her Option, but only within such period of time
as is specified in the Option Agreement, and only to the extent that the Option
is vested on the date of termination (but in no event later than the expiration
of the term of such Option as set forth in the Option Agreement). In the absence
of a specified time in the Option Agreement, the Option shall remain exercisable
for three (3) months following the Optionee's termination. If, on the date of
termination, the Optionee is not vested as to his or her entire Option, the
Shares covered by the unvested portion of the Option shall revert to the Plan.
If, after termination, the Optionee does not exercise his or her Option within
the time specified by the Administrator, the Option shall terminate, and the
Shares covered by such Option shall revert to the Plan.

             (c) Disability of Optionee. If an Optionee ceases to be an Employee
as a result of the Optionee's Disability, the Optionee may exercise his or her
Option within such period of time as is specified in the Option Agreement, to
the extent the Option is vested on the date of termination, including as to
accelerated vesting as set forth in the Option Agreement (but in no event later
than the expiration of the term of such Option as set forth in the Option
Agreement). In the absence of a specified time in the Option Agreement, the
Option shall remain exercisable for six (6) months following the Optionee's
termination. If, on the date of termination, the Optionee is not vested as to
his or her entire Option, the Shares covered by the unvested portion of the
Option shall revert to the Plan. If, after termination, the Optionee does not
exercise his or her Option within the time specified herein, the Option shall
terminate, and the Shares covered by such Option shall revert to the Plan.



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             (d) Death of Optionee. In the event of the death of an Optionee:

                    (i) during the term of the Option who is at the time of his
or her death an Employee, the Option may be exercised within such period of time
as is specified in the Option Agreement (in the absence of a specified time in
the Option Agreement, the Option shall remain exercisable for twelve (12) months
following Optionee's death, but in no event shall such period of time extend
beyond the date of expiration of the term of such Option as set forth in the
Notice of Grant), by the Optionee's estate or by a person who acquires the right
to exercise the Option by bequest or inheritance, but only to the extent of the
right to exercise that would have accrued had the Optionee continued living and
remained an Employee for six (6) months after the date of his or her death,
subject to the limitation set forth in Section 6(a); or

                    (ii) within thirty (30) days (or such other period of time
not exceeding three (3) months as is determined by the Administrator) after the
termination of the Optionee's status as an Employee, the Option may be exercised
within such period of time as is specified in the Option Agreement (but in no
event later than the date of expiration of the term of such Option as set forth
in the Notice of Grant), by the Optionee's estate or by a person who acquires
the right to exercise the Option by bequest or inheritance, but only to the
extent that the Option is vested at the date of termination.

                    If, at the time of death, the Optionee is not vested as to
his or her entire Option, then subject to the additional vesting of Shares which
may occur pursuant to Section 10(d)(i) hereof, the Shares covered by the
unvested portion of the Option shall immediately revert to the Plan. The Option
may be exercised by the executor or administrator of the Optionee's estate or,
if none, by the person(s) entitled to exercise the Option under the Optionee's
will or the laws of descent or distribution. If the Option is not so exercised
within the time specified herein, the Option shall terminate, and the Shares
covered by such Option shall revert to the Plan.

             (e) Buyout Provisions. The Administrator may at any time offer to
buy out for a payment in cash or Shares, an Option previously granted based on
such terms and conditions as the Administrator shall establish and communicate
to the Optionee at the time that such offer is made.

        11. Non-Transferability of Options . Unless determined otherwise by the
Administrator, an Option may not be sold, pledged, assigned, hypothecated,
transferred, or disposed of in any manner other than by will or by the laws of
descent or distribution and may be exercised, during the lifetime of the
Optionee, only by the Optionee. If the Administrator makes an Option
transferable, such Option shall contain such additional terms and conditions as
the Administrator deems appropriate.

        12. Adjustments Upon Changes in Capitalization, Dissolution, Merger,
Asset Sale or Change of Control.

             (a) Changes in Capitalization. Subject to any required action by
the stockholders of the Company, the number of shares of Common Stock covered by
each outstanding Option, and the number of shares of Common Stock which have
been authorized for issuance under the Plan but as to which no



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Options have yet been granted or which have been returned to the Plan upon
cancellation or expiration of an Option, as well as the price per share of
Common Stock covered by each such outstanding Option, shall be proportionately
adjusted for any increase or decrease in the number of issued shares of Common
Stock resulting from a stock split, reverse stock split, stock dividend,
combination or reclassification of the Common Stock, or any other increase or
decrease in the number of issued shares of Common Stock effected without receipt
of consideration by the Company; provided, however, that conversion of any
convertible securities of the Company shall not be deemed to have been "effected
without receipt of consideration." Such adjustment shall be made by the Board,
whose determination in that respect shall be final, binding and conclusive.
Except as expressly provided herein, no issuance by the Company of shares of
stock of any class, or securities convertible into shares of stock of any class,
shall affect, and no adjustment by reason thereof shall be made with respect to,
the number or price of shares of Common Stock subject to an Option.

             (b) Dissolution or Liquidation. In the event of the proposed
dissolution or liquidation of the Company, the Administrator shall notify each
Optionee as soon as practicable prior to the effective date of such proposed
transaction. The Administrator in its discretion may provide for an Optionee to
have the right to exercise his or her Option until ten (10) days prior to such
transaction as to all of the Optioned Stock covered thereby, including Shares as
to which the Option would not otherwise be exercisable. In addition, the
Administrator may provide that any Company repurchase option applicable to any
Shares purchased upon exercise of an Option shall lapse as to all such Shares,
provided the proposed dissolution or liquidation takes place at the time and in
the manner contemplated. To the extent it has not been previously exercised, an
Option will terminate immediately prior to the consummation of such proposed
action.

             (c) Merger or Asset Sale. In the event of a merger of the Company
with or into another corporation, or the sale of all or substantially all of the
assets of the Company, then, to the extent unvested, each outstanding Option
shall become vested and exercisable as to an additional 1/12th of the Shares
subject to the Option for each full year that such Option has been outstanding.
(In no event shall an Optionee obtain the right pursuant to this provision to
exercise an Option for more than 100% of the Optioned Stock originally granted
in connection with such Option.) In addition, each outstanding Option may be
assumed or an equivalent option substituted by the successor corporation or a
Parent or Subsidiary of the successor corporation. In the event that the
successor corporation refuses to assume or substitute for the Option, the
Optionee shall fully vest in and have the right to exercise the Option as to all
of the Optioned Stock, including Shares as to which it would not otherwise be
vested or exercisable. If an Option becomes fully vested and exercisable in lieu
of assumption or substitution in the event of a merger or sale of assets, the
Administrator shall notify the Optionee in writing or electronically that the
Option shall be fully vested and exercisable for a period of thirty (30) days
from the date of such notice, and the Option shall terminate upon the expiration
of such period. For the purposes of this paragraph, the Option shall be
considered assumed if, following the merger or sale of assets, the option
confers the right to purchase or receive, for each Share of Optioned Stock
subject to the Option immediately prior to the merger or sale of assets, the
consideration (whether stock, cash, or other securities or property) received in
the merger or sale of assets by holders of Common Stock for each Share held on
the effective date of the transaction (and if holders were offered a choice of
consideration,



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the type of consideration chosen by the holders of a majority of the outstanding
Shares); provided, however, that if such consideration received in the merger or
sale of assets is not solely common stock of the successor corporation or its
Parent, the Administrator may, with the consent of the successor corporation,
provide for the consideration to be received upon the exercise of the Option,
for each Share of Optioned Stock subject to the Option, to be solely common
stock of the successor corporation or its Parent equal in fair market value to
the per share consideration received by holders of Common Stock in the merger or
sale of assets.

        13. Date of Grant. The date of grant of an Option shall be, for all
purposes, the date on which the Administrator makes the determination granting
such Option, or such other later date as is determined by the Administrator.
Notice of the determination shall be provided to each Optionee within a
reasonable time after the date of such grant.

        14. Amendment and Termination of the Plan.

             (a) Amendment and Termination. The Board may at any time amend,
alter, suspend or terminate the Plan.

             (b) Effect of Amendment or Termination. No amendment, alteration,
suspension or termination of the Plan shall impair the rights of any Optionee,
unless mutually agreed otherwise between the Optionee and the Administrator,
which agreement must be in writing and signed by the Optionee and the Company.
Termination of the Plan shall not affect the Administrator's ability to exercise
the powers granted to it hereunder with respect to options granted under the
Plan prior to the date of such termination.

        15. Conditions Upon Issuance of Shares.

             (a) Legal Compliance. Shares shall not be issued pursuant to the
exercise of an Option unless the exercise of such Option and the issuance and
delivery of such Shares shall comply with Applicable Laws and shall be further
subject to the approval of counsel for the Company with respect to such
compliance.

             (b) Investment Representations. As a condition to the exercise of
an Option the Company may require the person exercising such Option to represent
and warrant at the time of any such exercise that the Shares are being purchased
only for investment and without any present intention to sell or distribute such
Shares if, in the opinion of counsel for the Company, such a representation is
required.

        16. Inability to Obtain Authority. The inability of the Company to
obtain authority from any regulatory body having jurisdiction, which authority
is deemed by the Company's counsel to be necessary to the lawful issuance and
sale of any Shares hereunder, shall relieve the Company of any liability in
respect of the failure to issue or sell such Shares as to which such requisite
authority shall not have been obtained.



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        17. Reservation of Shares. The Company, during the term of this Plan,
will at all times reserve and keep available such number of Shares as shall be
sufficient to satisfy the requirements of the Plan.



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                              AUSPEX SYSTEMS, INC.

                      1998 NON-STATUTORY STOCK OPTION PLAN

                             STOCK OPTION AGREEMENT


        Unless otherwise defined herein, the terms defined in the Plan shall
have the same defined meanings in this Option Agreement.

I. NOTICE OF STOCK OPTION GRANT

Optionee: [Name and Address]

        As an inducement essential into your entering into an employment
agreement with the Company, you have been granted an option to purchase Common
Stock of the Company, subject to the terms and conditions of the Plan and this
Option Agreement, as follows:

        Grant Number                     ____________________

        Date of Grant                    ____________________

        Vesting Commencement Date        ____________________

        Exercise Price per Share         $___________________

        Total Number of Shares Granted   ____________________

        Total Exercise Price             $___________________

        Type of Option:                  Nonstatutory Stock Option

        Term/Expiration Date:            ____________________


        Vesting Schedule:

        Subject to the Optionee continuing to be an Employee on such dates, this
Option shall vest and become exercisable in accordance with the following
schedule:



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        One-fourth (1/4) of the Shares subject to the Option shall vest twelve
(12) months after the Vesting Commencement Date, and One sixteenth (1/16) of the
Shares subject to the Option shall vest upon the last day of each quarterly
period thereafter, subject to the Optionee continuing to be an Employee on such
dates.

        Termination Period:

        This Option may be exercised for thirty (30) days after Optionee ceases
to be a an Employee. Upon the death or Disability of the Optionee, this Option
may be exercised for six (6) months after Optionee ceases to be an Employee. In
no event shall this Option be exercised later than the Term/Expiration Date as
provided above.

II. AGREEMENT

        1. Grant of Option. The Plan Administrator of the Company hereby grants
to the Optionee named in the Notice of Grant attached as Part I of this
Agreement (the "Optionee") an option (the "Option") to purchase the number of
Shares, as set forth in the Notice of Grant, at the exercise price per share set
forth in the Notice of Grant (the "Exercise Price"), subject to the terms and
conditions of the Plan, which is incorporated herein by reference. Subject to
Section 14(b) of the Plan, in the event of a conflict between the terms and
conditions of the Plan and the terms and conditions of this Option Agreement,
the terms and conditions of the Plan shall prevail.

        2. Exercise of Option.

             (a) Right to Exercise. This Option is exercisable during its term
in accordance with the Vesting Schedule set out in the Notice of Grant and the
applicable provisions of the Plan and this Option Agreement.

             (b) Method of Exercise. This Option is exercisable by delivery of
an exercise notice, in the form attached as Exhibit A (the "Exercise Notice"),
which shall state the election to exercise the Option, the number of Shares in
respect of which the Option is being exercised (the "Exercised Shares"), and
such other representations and agreements as may be required by the Company
pursuant to the provisions of the Plan. The Exercise Notice shall be completed
by the Optionee and delivered to a member of the Stock Option Administration
Department of the Company. The Exercise Notice shall be accompanied by payment
of the aggregate Exercise Price as to all Exercised Shares. This Option shall be
deemed to be exercised upon receipt by the Company of such fully executed
Exercise Notice accompanied by such aggregate Exercise Price.

             No Shares shall be issued pursuant to the exercise of this Option
unless such issuance and exercise complies with Applicable Laws. Assuming such
compliance, for income tax purposes the Exercised Shares shall be considered
transferred to the Optionee on the date the Option is exercised with respect to
such Exercised Shares.



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        3. Method of Payment. Payment of the aggregate Exercise Price shall be
by any of the following, or a combination thereof, at the election of the
Optionee:

             (a) cash;

             (b) check;

             (c) consideration received by the Company under a cashless exercise
program implemented by the Company in connection with the Plan; or

             (d) surrender of other Shares which (i) in the case of Shares
acquired upon exercise of an option, have been owned by the Optionee for more
than six (6) months on the date of surrender, AND (ii) have a Fair Market Value
on the date of surrender equal to the aggregate Exercise Price of the Exercised
Shares.

        4. Non-Transferability of Option. This Option may not be transferred in
any manner otherwise than by will or by the laws of descent or distribution and
may be exercised during the lifetime of Optionee only by the Optionee. The terms
of the Plan and this Option Agreement shall be binding upon the executors,
administrators, heirs, successors and assigns of the Optionee.

        5. Term of Option. This Option may be exercised only within the term set
out in the Notice of Grant, and may be exercised during such term only in
accordance with the Plan and the terms of this Option Agreement.

        6. Tax Consequences. Some of the federal tax consequences relating to
this Option, as of the date of this Option, are set forth below. THIS SUMMARY IS
NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO CHANGE.
THE OPTIONEE SHOULD CONSULT A TAX ADVISER BEFORE EXERCISING THIS OPTION OR
DISPOSING OF THE SHARES.

             (a) Exercising the Option. The Optionee may incur regular federal
income tax liability upon exercise of an NSO. The Optionee 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 Exercised Shares on the
date of exercise over their aggregate Exercise Price. If the Optionee is an
Employee or a former Employee, the Company will be required to withhold from his
or her compensation or collect from Optionee 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.

             (b) Disposition of Shares. If the Optionee holds NSO Shares for at
least one year, any gain realized on disposition of the Shares will be treated
as long-term capital gain for federal income tax purposes.



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        7. Entire Agreement; Governing Law. The Plan is incorporated herein by
reference. 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 Optionee with
respect to the subject matter hereof, and may not be modified adversely to the
Optionee's interest except by means of a writing signed by the Company and
Optionee. This agreement is governed by the internal substantive laws, but not
the choice of law rules, of California.

        8. NO GUARANTEE OF CONTINUED SERVICE. OPTIONEE ACKNOWLEDGES AND AGREES
THAT THE VESTING OF SHARES PURSUANT TO THE VESTING SCHEDULE HEREOF IS EARNED
ONLY BY CONTINUING AS AN EMPLOYEE AT THE WILL OF THE COMPANY (AND NOT THROUGH
THE ACT OF BEING HIRED, BEING GRANTED AN OPTION OR PURCHASING SHARES HEREUNDER).
OPTIONEE FURTHER ACKNOWLEDGES AND AGREES THAT THIS AGREEMENT, THE TRANSACTIONS
CONTEMPLATED HEREUNDER AND THE VESTING SCHEDULE SET FORTH HEREIN DO NOT
CONSTITUTE AN EXPRESS OR IMPLIED PROMISE OF CONTINUED ENGAGEMENT AS AN EMPLOYEE
FOR THE VESTING PERIOD, FOR ANY PERIOD, OR AT ALL, AND SHALL NOT INTERFERE WITH
OPTIONEE'S RIGHT OR THE COMPANY'S RIGHT TO TERMINATE OPTIONEE'S RELATIONSHIP AS
AN EMPLOYEE AT ANY TIME, WITH OR WITHOUT CAUSE.



                                      -4-
<PAGE>   15

        By your signature and the signature of the Company's representative
below, you and the Company agree that this Option is granted under and governed
by the terms and conditions of the Plan and this Option Agreement. Optionee has
reviewed the Plan and this Option Agreement in their entirety, has had an
opportunity to obtain the advice of counsel prior to executing this Option
Agreement and fully understands all provisions of the Plan and Option Agreement.
Optionee hereby agrees to accept as binding, conclusive and final all decisions
or interpretations of the Administrator upon any questions relating to the Plan
and Option Agreement. Optionee further agrees to notify the Company upon any
change in the residence address indicated below.


OPTIONEE                               AUSPEX SYSTEMS, INC.



-----------------------------------    ---------------------------------------
Signature                              By

-----------------------------------    ---------------------------------------
Print Name                             Title

-----------------------------------
Residence Address

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



                                      -5-
<PAGE>   16

                                    EXHIBIT A

                      1998 NON-STATUTORY STOCK OPTION PLAN

                                 EXERCISE NOTICE


Auspex Systems, Inc.
2300 Central Expressway
Santa Clara, CA 95050-2515

Attention: Stock Option Plan Administrator

        1. Exercise of Option. Effective as of today, ________________, ______,
the undersigned ("Purchaser") hereby elects to purchase ______________ shares
(the "Shares") of the Common Stock of Auspex Systems, Inc. (the "Company") under
and pursuant to the 1998 Non-Statutory Stock Option Plan (the "Plan") and the
Stock Option Agreement dated ________, ____ (the "Option Agreement"). The
purchase price for the Shares shall be $____, as required by the Option
Agreement.

        2. Delivery of Payment. Purchaser herewith delivers to the Company the
full purchase price for the Shares.

        3. Representations of Purchaser. Purchaser acknowledges that Purchaser
has received, read and understood the Plan and the Option Agreement and agrees
to abide by and be bound by their terms and conditions.

        4. Rights as Stockholder. Until the issuance (as evidenced by the
appropriate entry on the books of the Company or of a duly authorized transfer
agent of the Company) of the Shares, no right to vote or receive dividends or
any other rights as a stockholder shall exist with respect to the Optioned
Stock, notwithstanding the exercise of the Option. The Shares so acquired shall
be issued to the Optionee as soon as practicable after exercise of the Option.
No adjustment will be made for a dividend or other right for which the record
date is prior to the date of issuance, except as provided in Section 12 of the
Plan.

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


<PAGE>   17

        6. Entire Agreement; Governing Law. The Plan and Option Agreement are
incorporated herein by reference. This Agreement, the Plan and the 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 Purchaser with respect to the subject matter
hereof, and may not be modified adversely to the Purchaser's interest except by
means of a writing signed by the Company and Purchaser. This agreement is
governed by the internal substantive laws, but not the choice of law rules, of
California.


Submitted by:                          Accepted by:

PURCHASER                              AUSPEX SYSTEMS, INC.


----------------------------------     -------------------------------------
Signature                              By

----------------------------------     -------------------------------------
Print Name                             Title


                     -------------------------------------
                                 Date Received


Address:                               Address:

                                       2300 Central Expressway
----------------------------------
                                       Santa Clara, CA 95050-2515
----------------------------------


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