EXHIBIT 4.3

                        REGISTRATION RIGHTS AGREEMENT

     THIS REGISTRATION RIGHTS AGREEMENT ("Agreement") is entered into as of 
February 2, 1999 between ZITEL CORPORATION, a California corporation with 
offices at 47211 Bayside Parkway, Fremont, California  94538 (the "Company") 
and each of the entities listed under "Investors" on the signature page 
hereto (each an "Investor" and collectively the "Investors"), each with 
offices at the address listed under such Investor's name on Schedule I hereto.

                                 WITNESSETH:

     WHEREAS, pursuant to that certain Convertible Subordinated Debenture 
Purchase Agreement by and between the Company and the Investors (the 
"Purchase Agreement"), the Company initially has agreed to sell and issue to 
the Investors, and the Investors have agreed to purchase from the Company, an 
aggregate of $5 million principal amount of the Company's 3% Convertible 
Subordinated Debentures (the "Debentures") on the terms and conditions set 
forth therein;

     WHEREAS, the Purchase Agreement contemplates that the Debentures will be 
convertible into shares (the "Common Shares") of common stock, no par value, 
of the Company ("Common Stock") pursuant to the terms and conditions set 
forth in the Debentures; and

     WHEREAS, pursuant to the terms of, and in partial consideration for, the 
Investors' agreement to enter into the Purchase Agreement, the Company has 
agreed to issue the Warrants exercisable for Warrant Shares and to provide 
the Investors with certain registration rights with respect to the Common 
Shares and Warrant Shares and certain other rights and remedies with respect 
to the Debentures as set forth in this Agreement;

     NOW, THEREFORE, in consideration of the mutual promises, 
representations, warranties, covenants and conditions set forth in the 
Purchase Agreement and this Agreement, the Company and the Investors agree as 
follows:

     1.   CERTAIN DEFINITIONS.  Capitalized terms used herein and not 
otherwise defined shall have the meaning ascribed thereto in the Purchase 
Agreement, Warrants or the Debentures.  As used in this Agreement, the 
following terms shall have the following respective meanings:

     "CLOSING" and "CLOSING DATE" shall have the meanings ascribed to such 
terms in the Purchase Agreement.

     "COMMISSION" or "SEC" shall mean the Securities and Exchange Commission 
or any other federal agency at the time administering the Securities Act.

     "OUTSTANDING PRINCIPAL AMOUNT" shall have the meaning ascribed to such 
term in the Debentures.

                                     1


     "REGISTRABLE SECURITIES" shall mean:  (i) the Common Shares and Warrants 
Shares issued to each Holder or its permitted transferee or designee upon 
conversion of the Debentures or exercise of the Warrants, as applicable, or 
upon any stock split, stock dividend, recapitalization or similar event with 
respect to such Common Shares or Warrant Shares; (ii) any securities issued 
or issuable to each Holder upon the conversion, exercise or exchange of any 
Debentures, Warrants, Warrant Shares, or Common Shares; and (iii) any other 
security of the Company issued as a dividend or other distribution with 
respect to, conversion or exchange of or in replacement of Registrable 
Securities.

     The terms "REGISTER", "REGISTERED" and "REGISTRATION" shall refer to a 
registration effected by preparing and filing a registration statement in 
compliance with the Securities Act and applicable rules and regulations 
thereunder, and the declaration or ordering of the effectiveness of such 
registration statement.

     "REGISTRATION EXPENSES" shall mean all expenses to be incurred by the 
Company in connection with each Holder's registration rights under this 
Agreement, including, without limitation, all registration and filing fees, 
printing expenses, fees and disbursements of counsel for the Company, blue 
sky fees and expenses, reasonable fees and disbursements of counsel to 
Holders (using a single counsel selected by a majority in interest of the 
Holders) for a "due diligence" examination of the Company and review of the 
Registration Statement and related documents, and the expense of any special 
audits incident to or required by any such registration (but excluding the 
compensation of regular employees of the Company, which shall be paid in any 
event by the Company).

     "SELLING EXPENSES" shall mean all underwriting discounts and selling 
commissions applicable to the sale of Registrable Securities and all fees and 
disbursements of counsel for Holders not included within "Registration 
Expenses".

     "HOLDER" and "HOLDERS" shall include an Investor or the Investors, 
respectively, and any transferee of the Debentures, Warrants, Warrant Shares 
or Common Shares or Registrable Securities which have not been sold to the 
public to whom the registration rights conferred by this Agreement have been 
transferred in compliance with this Agreement.

     "REGISTRATION STATEMENT" shall have the meaning set forth in Section 
2(a) herein.

     "REGULATION D" shall mean Regulation D as promulgated pursuant to the 
Securities Act, and as subsequently amended.

     "SECURITIES ACT" or "ACT" shall mean the Securities Act of 1933, as 
amended.

     "WARRANTS" shall mean the warrants in form and substance of Exhibit 1.1B 
to the Purchase Agreement between the Company and the Investors, dated as of 
the date hereof.

     "WARRANT SHARES" shall mean shares of Common Stock of the Company issued 
and issuable upon exercise of the Warrant.

     2.   REGISTRATION REQUIREMENTS.  The Company shall use its best efforts to
effect the registration of the Registrable Securities (including without
limitation the execution of an 

                                     2


undertaking to file post-effective amendments, appropriate qualification 
under applicable blue sky or other state securities laws and appropriate 
compliance with applicable regulations issued under the Securities Act) as 
would permit or facilitate the sale or distribution of all the Registrable 
Securities in the manner (including manner of sale) and in all states 
reasonably requested by the Holder.  Such best efforts by the Company shall 
include the following:

          (a)  The Company shall, as expeditiously as reasonably possible 
after the Closing Date:

               (i)   But in any event within 30 days thereafter, prepare and 
file a registration statement with the Commission pursuant to Rule 415 under 
the Securities Act on Form S-3 under the Securities Act (or in the event that 
the Company is ineligible to use such form, such other form as the Company is 
eligible to use under the Securities Act) covering the Registrable Securities 
("Registration Statement").  Such Registration Statement shall, in addition 
and without limitation, register (pursuant to Rule 416 under the Securities 
Act, or otherwise) such additional indeterminate number of Registrable 
Securities as shall be necessary to permit the conversion in full of the 
Debentures and the issuance of additional shares of Common Stock to Holders 
pursuant to the various reset provisions of the Debentures.  Thereafter, the 
Company shall use its best efforts to cause such Registration Statement and 
other filings to be declared effective as soon as possible, and in any event 
prior to 90 days following the Closing Date.  The Company shall provide 
Holders and their legal counsel reasonable opportunity to review any such 
Registration Statement or amendment or supplement thereto prior to filing.

               (ii)  Prepare and file with the SEC such amendments and 
supplements to such Registration Statement and the prospectus used in 
connection with such Registration Statement as may be necessary to comply 
with the provisions of the Act with respect to the disposition of all 
securities covered by such Registration Statement and notify the Holders of 
the filing and effectiveness of such Registration Statement and any 
amendments or supplements.

               (iii) Furnish to each Holder such numbers of copies of a 
current prospectus conforming with the requirements of the Act, copies of the 
Registration Statement, any amendment or supplement thereto and any documents 
incorporated by reference therein and such other documents as such Holder may 
reasonably require in order to facilitate the disposition of Registrable 
Securities owned by such Holder.

               (iv)  Use its best efforts to register and qualify the 
securities covered by such Registration Statement under such other securities 
or "Blue Sky" laws of such jurisdictions as shall be reasonably requested by 
each Holder; provided that the Company shall not be required in connection 
therewith or as a condition thereto to qualify to do business or to file a 
general consent to service of process in any such states or jurisdictions.

               (v)   Notify each Holder immediately of the happening of any 
event as a result of which the prospectus (including any supplements thereto 
or thereof) included in such Registration Statement, as then in effect, 
includes an untrue statement of material fact or omits to state a material 
fact required to be stated therein or necessary to make the statements 
therein not misleading in light of the circumstances then existing, and use 
its best efforts to promptly update and/or correct such prospectus.

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               (vi)  Notify each Holder immediately of the issuance by the 
Commission or any state securities commission or agency of any stop order 
suspending the effectiveness of the Registration Statement or the initiation 
of any proceedings for that purpose.  The Company shall use its best efforts 
to prevent the issuance of any stop order and, if any stop order is issued, 
to obtain the lifting thereof at the earliest possible time.

               (vii) Permit a single firm of counsel, designated as Holders' 
counsel by a majority of the Registrable Securities included in the 
Registration Statement, to review the Registration Statement and all 
amendments and supplements thereto within a reasonable period of time prior 
to each filing, and shall not file any document in a form to which such 
counsel reasonably objects.

               (viii) Use its best efforts to list the Registrable Securities 
covered by such Registration Statement with all securities exchange(s) and/or 
markets on which the Common Stock is then listed and prepare and file any 
required filings with the National Association of Securities Dealers, Inc. or 
any exchange or market where the Common Shares are traded.

               (ix)  Take all steps necessary to enable Holders to avail 
themselves of the prospectus delivery mechanism set forth in Rule 153 (or 
successor thereto) under the Act.

          (b)  Set forth below in this Section 2(b) are (I) events that may 
arise that the Investors consider will interfere with the full enjoyment of 
their rights under the Debentures, the Purchase Agreement and this Agreement 
(the "Interfering Events"), and (II) certain remedies applicable in each of 
these events.  Paragraphs (i) through (iv) of this Section 2(b) describe the 
Interfering Events, provide a remedy to the Investors if an Interfering Event 
occurs and provide that the Investors may require that the Company redeem 
outstanding Debentures at a specified price if certain Interfering Events are 
not timely cured.  Paragraph (v) provides, inter alia, that if cash payments 
required as the remedy in the case of certain of the Interfering Events are 
not paid when due, the Company may be required by the Investors to redeem 
outstanding Debentures at a specified price.  Paragraph (vi) provides, inter 
alia, that the Investors have the right to specific performance.  The 
preceding paragraphs in this Section 2(b) are meant to serve only as an 
introduction to this Section 2(b), are for convenience only, and are not to 
be considered in applying, construing or interpreting this Section 2(b).

               (i)   DELAY IN EFFECTIVENESS OF REGISTRATION STATEMENT.  The 
Company agrees that it shall file the Registration Statement complying with 
the requirements of this Agreement promptly and in any event within 30 days 
following the date of the initial closing of the Purchase Agreement (the 
"Closing Date") and shall use its best efforts to cause such Registration 
Statement to become effective as soon as possible and in any event within 90 
days from the Closing Date.  In the event that such Registration Statement 
has not been declared effective within 90 days from the Closing Date, then 
the percentage (initially 90%) employed to determine the "Conversion Price" 
pursuant to Section 5(c) of the Debentures and all Conversion Price resets 
pursuant to Sections 5(d) and 5(e) of the Debentures (the "Agreed 
Percentage") shall be reduced by 1% during and after the 30-day period 
("Default Period") from and after the 90th day following the Closing Date 
during any part of which such Registration Statement is not effective, and 
such Agreed Percentage shall be further reduced by an additional 1.5% during 
and 

                                     4


after each Default Period thereafter.  For example, if the Registration 
Statement does not become effective until 120 days from the Closing Date, the 
Agreed Percentage from and after day 91 shall be equal to 89%.  If the 
Registration Statement is not effective until the 150th day after the Closing 
Date, the Agreed Percentage from and after day 121 from the Closing Date 
shall be 87.5%.  In each case, the Agreed Percentage and the Conversion Price 
shall be subject to further adjustment as set forth in the Debenture and the 
Purchase Agreement.  If the Registration Statement has not been declared 
effective within 150 days after the Closing Date, then each Holder shall have 
the right in its sole discretion to sell its Debentures, Common Shares and/or 
Warrant Shares to the Company (in whole or in part) at a price in immediately 
available funds (the "Premium Redemption Price") equal to (A) as to the 
Debentures, 1.3 times (i.e., 130% of) the Outstanding Principal Amount of the 
Debentures plus any accrued but unpaid or unrecognized interest or default 
payments and (B) as to the Common Shares and/or Warrant Shares, 1.3 times the 
dollar amount which is the product of (x) the number of shares so to be 
redeemed pursuant to this paragraph, and (y) the fair market value of such 
shares (as defined in the Debentures) at the time such shares were received 
pursuant to conversion of Debentures or exercise of Warrants.  Payment of 
such amount shall be due and payable within 3 business days of demand 
therefor, which demand shall be revocable by the Holder at any time prior to 
its actual receipt of the Premium Redemption Price.

               (ii)  NO LISTING; PREMIUM PRICE REDEMPTION FOR DELISTING OF 
CLASS OF SHARES.

                    (A)  In the event that the Company fails, refuses or is 
unable to cause the Registrable Securities covered by the Registration 
Statement to be listed with the Approved Market and each other securities 
exchange and market on which the Common Stock is then traded at all times 
during the period ("Listing Period") commencing the earlier of the effective 
date of the Registration Statement or the 90th day following the Closing 
Date, and continuing thereafter for so long as the Debentures are 
outstanding, then the Company shall pay in cash to each Holder a default 
payment at a rate (the "Default Payment Rate") equal to two percent (2%) of 
the sum of (x) the Outstanding Principal Amount of, (y) the accrued but 
unpaid interest on, plus (z) the accrued but unpaid or unrecognized default 
payments on the Debentures (the "Debenture Amount") held by such Holder for 
each 30-day period (or portion thereof) during the Listing Period from and 
after such failure, refusal or inability to so list the Registrable 
Securities until the Registrable Securities are so listed.

                    (B)  In the event that shares of Common Stock of the 
Company are delisted from the Approved Market at any time following the 
Closing Date and remain delisted for 5 consecutive days, then at the option 
of each Holder and to the extent such Holder so elects, the Company shall on 
2 business days notice redeem the Debentures and/or Common Shares and/or 
Warrant Shares held by such Holder, in whole or in part, at a redemption 
price equal to the Premium Redemption Price (as defined above); provided, 
however, that such Holder may revoke such request at any time prior to 
receipt of such payment of such redemption price.  Default payments shall no 
longer accrue on Debentures after such shares have been redeemed by the 
Company pursuant to the foregoing provision.

               (iii) BLACKOUT PERIODS.  In the event any Holder's ability to 
sell Registrable Securities under the Registration Statement is suspended:

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                    (A)  for more than (i) five (5) consecutive days or (ii) 
ten (10) days in any calendar year ("Suspension Grace Period"), including 
without limitation by reason of a suspension of trading of the Common Stock 
on the Approved Market, any suspension or stop order with respect to the 
Registration Statement or the fact that an event has occurred as a result of 
which the prospectus (including any supplements thereto) included in such 
Registration Statement then in effect includes an untrue statement of 
material fact or omits to state a material fact required to be stated therein 
or necessary to make the statements therein not misleading in light of the 
circumstances then existing; or

                    (B)  for more than (i) twenty (20) consecutive days or 
(ii) thirty (30) days in any calendar year ("Corporate Event Suspension Grace 
Period"), by reason of any corporate event, including, without limitation, a 
merger, acquisition or disposition;

then the Company shall pay in cash to each Holder a default payment at the 
Default Payment Rate of the Debenture Amount for the Debentures held by such 
Holder for each 30-day period (or portion thereof) from and after the 
expiration of the Suspension Grace Period or Corporate Event Suspension Grace 
Period. Alternatively, a Holder shall have the right but not the obligation 
to have the Company redeem its Debentures and Common Shares and Warrant 
Shares at the price and on the terms (and subject to the right to revoke) set 
forth in Section 2(b)(i) above.

               (iv)  CONVERSION DEFICIENCY; PREMIUM PRICE REDEMPTION FOR 
CONVERSION DEFICIENCY.  In the event that the Company does not have a 
sufficient number of Common Shares available to satisfy the Company's 
obligations to any Holder upon receipt of a Conversion Notice (as defined in 
the Debenture) or is otherwise unable or unwilling to issue such Common 
Shares (including without limitation by reason of the limit described in 
Section 10 below) in accordance with the terms of the Debenture for any 
reason after receipt of a Conversion Notice, then:

                    (A)  The Company shall pay in cash to each Holder a 
default payment at the Default Payment Rate on the Debenture Amount for the 
Debentures held by such Holder for each 30-day period (or portion thereof) 
that the Company fails or refuses to issue Common Shares in accordance with 
the Debenture terms; and

                    (B)  At any time five days after the commencement of the 
running of the first 30-day period described above in clause (A) of this 
paragraph (iv), at the request of any Holder pursuant to a redemption notice, 
the Company promptly (1) shall purchase from such Holder, at a purchase price 
equal to the Premium Redemption Price, the Debenture Amount of Debentures 
equal to such Holder's pro rata share of the "Deficiency", as such terms are 
defined below, if the failure to issue Common Shares results from the lack of 
a sufficient number thereof and (2) shall purchase all (or such portion as 
such Holder may elect) of such Holder's Debentures at such Premium Redemption 
Price if the failure to issue Common Shares results from any other cause.  
The "Deficiency" shall be equal to the Debenture Amount of Debentures that 
would not be able to be converted for Common Shares, due to an insufficient 
number of Common Shares available, if all the outstanding Debentures were 
submitted for conversion at the Conversion Price set forth in the Debentures 
as of the date such Deficiency is determined.  Any request by a Holder 
pursuant to this paragraph (iv)(B) shall be revocable by that Holder at any 
time prior to its receipt of the Premium Redemption Price.

                                     6


               (v)   PREMIUM PRICE REDEMPTION FOR CASH PAYMENT DEFAULTS.

                    (A)  The Company acknowledges that any failure, refusal 
or inability by the Company described in the foregoing paragraphs (i) through 
(iv) will cause the Holders to suffer damages in an amount that will be 
difficult to ascertain, including without limitation damages resulting from 
the loss of liquidity in the Registrable Securities and the additional 
investment risk in holding the Registrable Securities.  Accordingly, the 
parties agree that it is appropriate to include in this Agreement the 
foregoing provisions for default payments, discounts and mandatory 
redemptions in order to compensate the Holders for such damages.  The parties 
acknowledge and agree that the default payments, discounts and mandatory 
redemptions set forth above represent the parties' good faith effort to 
quantify such damages and, as such, agree that the form and amount of such 
default payments, discounts and mandatory redemptions are reasonable and will 
not constitute a penalty.

                    (B)  Each default payment provided for in the foregoing 
paragraphs (ii) through (iv) shall be in addition to each other default 
payment; provided, however, that in no event shall the Company be obligated 
to pay to any Holder default payments in an aggregate amount greater than the 
Default Payment Rate of the Debenture Amount of the Debentures held by such 
Holder for any 30-day period (or portion thereof).  All default payments 
(which payments shall be pro rata on a per diem basis for any period of less 
than 30 days) required to be made in connection with the above provisions 
shall be paid in cash at any time upon demand, and whether or not a demand is 
made, by the tenth (10th) day of each calendar month for each partial or full 
30-day period occurring prior to that date.  Until paid as required in this 
Agreement, default payments shall be deemed added to, and a part of, the 
Outstanding Principal Amount of a Holder's Debentures.

                    (C)  In the event that the Company fails or refuses to 
pay any default payment or honor any default adjustments of the Agreed 
Percentage when due, at any Holder's request and option the Company shall 
purchase all or a portion of the Debentures, Common Shares and/or Warrant 
Shares held by such Holder (with default payments accruing through the date 
of such purchase), within five (5) days of such request, at a purchase price 
equal to the Premium Redemption Price (as defined above), provided that such 
Holder may revoke such request at any time prior to receipt of such payment 
of such purchase price. Until such time as the Company purchases such 
Debentures at the request of such Holder pursuant to the preceding sentence, 
at any Holder's request and option the Company shall as to such Holder pay 
such amount by adding and including the amount of such default payment to the 
Outstanding Principal Amount of a Holder's Debentures.

               (vi)  CUMULATIVE REMEDIES.  The default payments and mandatory 
redemptions provided for above are in addition to and not in lieu or 
limitation of any other rights the Holders may have at law, in equity or 
under the terms of the Debentures, the Purchase Agreement, the Warrants or 
this Agreement, including without limitation the right to specific 
performance.  Each Holder shall be entitled to specific performance of any 
and all obligations of the Company in connection with the registration rights 
of the Holders hereunder.

          (c)  If the Holder(s) intend to distribute the Registrable 
Securities by means of an underwriting, the Holder(s) shall so advise the 
Company.  Any such underwriting may only 

                                     7


be administered by investment bankers reasonably satisfactory to the Company. 
 The Company shall only be obligated to permit one underwritten offering, 
which offering shall be determined by a majority-in-interest of the Holders.

          (d)  The Company shall enter into such customary agreements for 
secondary offerings (including a customary underwriting agreement with the 
underwriter or underwriters, if any) and take all such other reasonable 
actions reasonably requested by the Holders in connection therewith in order 
to expedite or facilitate the disposition of such Registrable Securities.  
When Registrable Securities are to be sold in an underwritten offering the 
Company shall:

               (i)   make such representations and warranties to the Holders 
and the underwriter or underwriters, if any, in form, substance and scope as 
are customarily made by issuers to underwriters and holders in secondary 
offerings;

               (ii)  cause to be delivered to the sellers of Registrable 
Securities and the underwriter or underwriters, if any, opinions of 
independent counsel to the Company, on and dated as of the Effectiveness 
Date, which counsel and opinions (in form, scope and substance) shall be 
reasonably satisfactory to the Holders and the underwriter(s), if any, and 
their counsel and covering, without limitation, such matters as are 
customarily given to underwriters and holders in underwritten offerings, 
addressed to the Holders and each underwriter, if any;

               (iii) cause to be delivered, immediately prior to the 
effectiveness of the Registration Statement (and at the time of delivery of 
any Registrable Securities sold pursuant thereto), a "comfort" letter from 
the Company's independent certified public accountants addressed to the 
Holders and each underwriter, if any, stating that such accountants are 
independent public accountants within the meaning of the Securities Act and 
the applicable published rules and regulations thereunder, and otherwise in 
customary form and covering such financial and accounting matters as are 
customarily covered by letters of the independent certified public 
accountants delivered in connection with registered offerings;

               (iv)  the underwriting agreement shall include customary 
indemnification and contribution provisions to and from the underwriters and 
procedures for secondary underwritten offerings; and

               (v)   deliver such documents and certificates as may be 
reasonably requested by the Holders of the Registrable Securities being sold 
or the managing underwriter or underwriters, if any, to evidence compliance 
with clause (i) above and with any customary conditions contained in the 
underwriting agreement, if any.

          (e)  The Company shall make available for inspection by the 
Holders, representative(s) of all the Holders together, any underwriter 
participating in any disposition pursuant to a Registration Statement, and 
any attorney or accountant retained by any Holder or underwriter, all 
financial and other records customary for purposes of the Holders' due 
diligence examination of the Company and review of any Registration 
Statement, all SEC Documents (as defined in the Purchase Agreement) filed 
subsequent to the Closing, pertinent corporate documents and properties of 
the Company, and cause the Company's officers, directors and 

                                     8


employees to supply all information reasonably requested by any such 
representative, underwriter, attorney or accountant in connection with such 
Registration Statement, provided that such parties agree to keep such 
information confidential.

          (f)  Subject to Section 2(b) above, the Company may suspend the use 
of any prospectus used in connection with the Registration Statement only in 
the event, and for such period of time as, such a suspension is required by 
the rules and regulations of the Commission.  The Company will use its best 
efforts to cause such suspension to terminate at the earliest possible date.

          (g)  The Company shall file a Registration Statement with respect 
to any newly authorized and/or reserved shares within five (5) business days 
of any shareholders meeting authorizing same and shall use its best efforts 
to cause such Registration Statement to become effective within sixty (60) 
days of such shareholders meeting.  If the Holders become entitled, pursuant 
to an event described in clause (iii) of the definition of Registrable 
Securities, to receive any securities in respect of Registrable Securities 
that were already included in a Registration Statement, subsequent to the 
date such Registration Statement is declared effective, and the Company is 
unable under the securities laws to add such securities to the then effective 
Registration Statement, the Company shall promptly file, in accordance with 
the procedures set forth herein, an additional Registration Statement with 
respect to such newly Registrable Securities.  The Company shall use its best 
efforts to (i) cause any such additional Registration Statement, when filed, 
to become effective under the Securities Act, and (ii) keep such additional 
Registration Statement effective during the period described in Section 5 
below.  All of the registration rights and remedies under this Agreement 
shall apply to the registration of such newly reserved shares and such new 
Registrable Securities, including without limitation the provisions providing 
for default payments contained herein.

     3.   EXPENSES OF REGISTRATION.  All Registration Expenses incurred in 
connection with any registration, qualification or compliance with 
registration pursuant to this Agreement shall be borne by the Company, and 
all Selling Expenses of a Holder shall be borne by such Holder.

     4.   REGISTRATION ON FORM S-3.  The Company shall use its best efforts 
to qualify for registration on Form S-3 or any comparable or successor form 
or forms, or in the event that the Company is ineligible to use such form, 
such form as the Company is eligible to use under the Securities Act.

     5.   REGISTRATION PERIOD.  In the case of the registration effected by 
the Company pursuant to this Agreement, the Company will use its best efforts 
to keep such registration effective until the later of (a) the first 
anniversary of the issue of the Debenture and Warrant and (b) the date upon 
which all shares of Common Stock issuable upon conversion of the Debentures 
have been sold freely without restriction.

     6.   INDEMNIFICATION.

          (a)  THE COMPANY INDEMNITY.  The Company will indemnify each Holder,
each of its officers, directors and partners, and each person controlling each
Holder, within the 

                                     9


meaning of Section 15 of the Securities Act and the rules and regulations 
thereunder with respect to which registration, qualification or compliance 
has been effected pursuant to this Agreement, and each underwriter, if any, 
and each person who controls, within the meaning of Section 15 of the 
Securities Act and the rules and regulations thereunder, any underwriter, 
against all claims, losses, damages and liabilities (or actions in respect 
thereof) arising out of or based on any untrue statement (or alleged untrue 
statement) of a material fact contained in any prospectus, offering circular 
or other document (including any related registration statement, notification 
or the like) incident to any such registration, qualification or compliance, 
or based on any omission (or alleged omission) to state therein a material 
fact required to be stated therein or necessary to make the statements 
therein not misleading, or any violation by the Company of the Securities Act 
or any state securities law or in either case, any rule or regulation 
thereunder applicable to the Company and relating to action or inaction 
required of the Company in connection with any such registration, 
qualification or compliance, and will reimburse each Holder, each of its 
officers, directors and partners, and each person controlling such Holder, 
each such underwriter and each person who controls any such underwriter, for 
any legal and any other expenses reasonably incurred in connection with 
investigating and defending any such claim, loss, damage, liability or 
action, provided that the Company will not be liable in any such case to a 
Holder to the extent that any such claim, loss, damage, liability or expense 
arises out of or is based on any untrue statement or omission based upon 
written information furnished to the Company by such Holder or the 
underwriter (if any) therefor and stated to be specifically for se therein.  
The indemnity agreement contained in this Section 6(a) shall not apply to 
amounts paid in settlement of any such loss, claim, damage, liability or 
action if such settlement is effected without the consent of the Company 
(which consent will not be unreasonably withheld).

          (b)  HOLDER INDEMNITY.  Each Holder will, severally and not 
jointly, if Registrable Securities held by it are included in the securities 
as to which such registration, qualification or compliance is being effected, 
indemnify the Company, each of its directors, officers, partners, and each 
underwriter, if any, of the Company's securities covered by such a 
registration statement, each person who controls the Company or such 
underwriter within the meaning of Section 15 of the Securities Act and the 
rules and regulations thereunder, each other Holder (if any), and each of 
their officers, directors and partners, and each person controlling such 
other Holder(s) against all claims, losses, damages and liabilities (or 
actions in respect thereof) arising out of or based on any untrue statement 
(or alleged untrue statement) of a material fact contained in any such 
registration statement, prospectus, offering circular or other document, or 
any omission (or alleged omission) to state therein a material fact required 
to be stated therein or necessary to make the statement therein not 
misleading, and will reimburse the Company and such other Holder(s) and their 
directors, officers and partners, underwriters or control persons for any 
legal or any other expenses reasonably incurred in connection with 
investigating and defending any such claim, loss, damage, liability or 
action, in each case to the extent, but only to the extent, that such untrue 
statement (or alleged untrue statement) or omission (or alleged omission) is 
made in such registration statement, prospectus, offering circular or other 
document in reliance upon and in conformity with written information 
furnished to the Company by such Holder and stated to be specifically for use 
therein, and provided that the maximum amount for which such Holder shall be 
liable under this indemnity shall not exceed the net proceeds received by 
such Holder from the sale of the Registrable Securities.  The indemnity 
agreement contained in this Section 6(b) shall not apply to amounts paid in 
settlement 

                                     10


of any such claims, losses, damages or liabilities if such settlement is 
effected without the consent of such Holder (which consent shall not be 
unreasonably withheld).

          (c)  PROCEDURE.  Each party entitled to indemnification under this 
Article (the "Indemnified Party") shall give notice to the party required to 
provide indemnification (the "Indemnifying Party") promptly after such 
Indemnified Party has actual knowledge of any claim as to which indemnity may 
be sought, and shall permit the Indemnifying Party to assume the defense of 
any such claim in any litigation resulting therefrom, provided that counsel 
for the Indemnifying Party, who shall conduct the defense of such claim or 
any litigation resulting therefrom, shall be approved by the Indemnified 
Party (whose approval shall not be unreasonably withheld), and the 
Indemnified Party may participate in such defense at such party's expense, 
and provided further that the failure of any Indemnified Party to give notice 
as provided herein shall not relieve the Indemnifying Party of its 
obligations under this Article except to the extent that the Indemnifying 
Party is materially and adversely affected by such failure to provide notice. 
 No Indemnifying Party, in the defense of any such claim or litigation, 
shall, except with the consent of each Indemnified Party, consent to entry of 
any judgment or enter into any settlement which does not include as an 
unconditional term thereof the giving by the claimant or plaintiff to such 
Indemnified Party of a release from all liability in respect to such claim or 
litigation.  Each Indemnified Party shall furnish such information regarding 
itself or the claim in question as an Indemnifying Party may reasonably 
request in writing and as shall be reasonably required in connection with the 
defense of such claim and litigation resulting therefrom.

     7.   CONTRIBUTION.  If the indemnification provided for in Section 6 
herein is unavailable to the Indemnified Parties in respect of any losses, 
claims, damages or liabilities referred to herein (other than by reason of 
the exceptions provided therein), then each such Indemnifying Party, in lieu 
of indemnifying such Indemnified Party, shall contribute to the amount paid 
or payable by such Indemnified Party as a result of such losses, claims, 
damages or liabilities as between the Company on the one hand and any Holder 
on the other, in such proportion as is appropriate to reflect the relative 
fault of the Company and of such Holder in connection with the statements or 
omissions which resulted in such losses, claims, damages or liabilities, as 
well as any other relevant equitable considerations.  The relative fault of 
the Company on the one hand and of any Holder on the other shall be 
determined by reference to, among other things, whether the untrue or alleged 
untrue statement of a material fact or omission or alleged omission to state 
a material fact relates to information supplied by the Company or by such 
Holder.

     In no event shall the obligation of any Indemnifying Party to contribute 
under this Section 7 exceed the amount that such Indemnifying Party would 
have been obligated to pay by way of indemnification if the indemnification 
provided for under Section 6(a) or 6(b) hereof had been available under the 
circumstances.

     The Company and the Holders agree that it would not be just and equitable
if contribution pursuant to this Section 7 were determined by pro rata
allocation (even if the Holders or the underwriters were treated as one entity
for such purpose) or by any other method of allocation which does not take
account of the equitable considerations referred to in the immediately preceding
paragraphs.  The amount paid or payable by an Indemnified Party as a 

                                     11


result of the losses, claims, damages and liabilities referred to in the 
immediately preceding paragraphs shall be deemed to include, subject to the 
limitations set forth above, any legal or other expenses reasonably incurred 
by such Indemnified Party in connection with investigating or defending any 
such action or claim. Notwithstanding the provisions of this section, no 
Holder or underwriter shall be required to contribute any amount in excess of 
the amount by which (i) in the case of any Holder, the net proceeds received 
by such Holder from the sale of Registrable Securities or (ii) in the case of 
an underwriter, the total price at which the Registrable Securities purchased 
by it and distributed to the public were offered to the public exceeds, in 
any such case, the amount of any damages that such Holder or underwriter has 
otherwise been required to pay by reason of such untrue or alleged untrue 
statement or omission or alleged omission.  No person guilty of fraudulent 
misrepresentation (within the meaning of Section 11(f) of the Securities Act) 
shall be entitled to contribution from any person who was not guilty of such 
fraudulent misrepresentation.

     8.   SURVIVAL.  The indemnity and contribution agreements contained in 
Sections 6 and 7 and the representations and warranties of the Company 
referred to in Section 2(d)(i) shall remain operative and in full force and 
effect regardless of (i) any termination of this Agreement or the Purchase 
Agreement or any underwriting agreement, (ii) any investigation made by or on 
behalf of any Indemnified Party or by or on behalf of the Company, and (iii) 
the consummation of the sale or successive resales of the Registrable 
Securities.

     9.   INFORMATION BY HOLDERS.  Each Holder shall furnish to the Company 
such information regarding such Holder and the distribution and/or sale 
proposed by such Holder as the Company may reasonably request in writing and 
as shall be reasonably required in connection with any registration, 
qualification or compliance referred to in this Agreement.  The intended 
method or methods of disposition and/or sale (Plan of Distribution) of such 
securities as so provided by such Investor shall be included without 
alteration in the Registration Statement covering the Registrable Securities 
and shall not be changed without written consent of such Holder.

     10.  NASDAQ LIMIT ON STOCK ISSUANCES.  Section 7(g) of the Debenture 
shall govern limits imposed by NASDAQ rules on the conversion of Debentures 
or the exercise of Warrants.

     11.  REPLACEMENT CERTIFICATES.  The certificate(s) representing the 
Common Shares or Warrant Shares held by any Investor (or then Holder) may be 
exchanged by such Investor (or such Holder) at any time and from time to time 
for certificates with different denominations representing an equal aggregate 
number of Common Shares or Warrant Shares, as reasonably requested by such 
Investor (or such Holder) upon surrendering the same.  No service charge will 
be made for such registration or transfer or exchange.

     12.  TRANSFER OR ASSIGNMENT.  Except as otherwise provided herein, this 
Agreement shall be binding upon and inure to the benefit of the parties and 
their successors and permitted assigns.  The rights granted to the Investors 
by the Company under this Agreement to cause the Company to register 
Registrable Securities may be transferred or assigned (in whole or in part) 
to a transferee or assignee of Debentures or Warrants, and all other rights 
granted to the Investors by the Company hereunder may be transferred or 
assigned to any transferee or assignee of any Debentures or Warrants; 
provided in each case that the Company must be given written notice by 

                                     12


the such Investor at the time of or within a reasonable time after said 
transfer or assignment, stating the name and address of said transferee or 
assignee and identifying the securities with respect to which such 
registration rights are being transferred or assigned; and provided further 
that the transferee or assignee of such rights agrees in writing to be bound 
by the registration provisions of this Agreement.

     13.  MISCELLANEOUS.

          (a)  REMEDIES.  The Company and the Investors acknowledge and agree 
that irreparable damage would occur in the event that any of the provisions 
of this Agreement were not performed in accordance with their specific terms 
or were otherwise breached.  It is accordingly agreed that the parties shall 
be entitled to an injunction or injunctions to prevent or cure breaches of 
the provisions of this Agreement and to enforce specifically the terms and 
provisions hereof, this being in addition to any other remedy to which any of 
them may be entitled by law or equity.

          (b)  JURISDICTION.  The Company and each of the Investors (i) 
hereby irrevocably submits to the exclusive jurisdiction of the United States 
District Court, the New York State courts and other courts of the United 
States sitting in New York County, New York for the purposes of any suit, 
action or proceeding arising out of or relating to this Agreement and (ii) 
hereby waives, and agrees not to assert in any such suit action or 
proceeding, any claim that it is not personally subject to the jurisdiction 
of such court, that the suit, action or proceeding is brought in an 
inconvenient forum or that the venue of the suit, action or proceeding is 
improper.  The Company and each of the Investors consents to process being 
served in any such suit, action or proceeding by mailing a copy thereof to 
such party at the address in effect for notices to it under this Agreement 
and agrees that such service shall constitute good and sufficient service of 
process and notice thereof.  Nothing in this paragraph shall affect or limit 
any right to serve process in any other manner permitted by law.

          (c)  NOTICES.  Any notice or other communication required or 
permitted to be given hereunder shall be in writing by facsimile, mail or 
personal delivery and shall be effective upon actual receipt of such notice.  
The addresses for such communications shall be:

          to the Company:

          Zitel Corporation
          47211 Bayside Parkway
          Fremont, California  94538
          Attention: Chief Financial Officer
          Facsimile: (510) 440-8526

          to the Investors:

          To each Investor at the address and/or fax number set forth
          on Schedule I of this Agreement.

          with copies to:

                                     13



          Kleinberg, Kaplan, Wolff & Cohen, P.C.
          551 Fifth Avenue
          New York, New York 10176
          Facsimile: (212) 986-8866
          Attention: Stephen M. Schultz, Esq.

Any party hereto may from time to time change its address for notices by 
giving at least 10 days' written notice of such changed address to the other 
parties hereto.

          (d)  INDEMNITY.  Each party shall indemnify each other party 
against any loss, cost or damages (including reasonable attorney's fees) 
incurred as a result of such parties' breach of any representation, warranty, 
covenant or agreement in this Agreement.

          (e)  WAIVERS.  No waiver by any party of any default with respect 
to any provision, condition or requirement of this Agreement shall be deemed 
to be a continuing waiver in the future or a waiver of any other provision, 
condition or requirement hereof, nor shall any delay or omission of any party 
to exercise any right hereunder in any manner impair the exercise of any such 
right accruing to it thereafter.  The representations and warranties and the 
agreements and covenants of the Company and each Investor contained herein 
shall survive the Closing.

          (f)  EXECUTION.  This Agreement may be executed in two or more 
counterparts, all of which shall be considered one and the same agreement, it 
being understood that all parties need not sign the same counterpart.

          (g)  ENTIRE AGREEMENT.  This Agreement, together with the Purchase 
Agreement, the Debentures and the Warrants and the agreements and documents 
contemplated hereby and thereby, contains the entire understanding and 
agreement of the parties, and may not be modified or terminated except by a 
written agreement signed by both parties.

          (h)  GOVERNING LAW; CONSENT OF JURISDICTION.  This Agreement and 
the validity and performance of the terms hereof shall be governed by and 
construed and enforced in accordance with the internal laws of the State of 
New York applicable to contracts executed and to be performed entirely in 
such State.

          (i)  SEVERABILITY.  The parties acknowledge and agree that the 
Investors are not agents, affiliates or partners of each other, that all 
representations, warranties, covenants and agreements of the Investors 
hereunder are several and not joint, that no Investor shall have any 
responsibility or liability for the representations, warrants, agreements, 
acts or omissions of any other Investor, and that any rights granted to 
"Investors" hereunder shall be enforceable by each Investor hereunder.

          (j)  JURY TRIAL.  Each party hereto waives the right to a trial by 
jury.

          (k)  TITLES.  The titles used in this Agreement are used for 
convenience only and are not to be considered in construing or interpreting 
this Agreement.

                             [SIGNATURE PAGES FOLLOW ]

                                     14


     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be 
duly executed as of the date first above written.

                                    ZITEL CORPORATION

                                    By:       Anna M. McCann
                                             -------------------------------
                                    Name:     Anna M. McCann
                                    Title:    V.P. Finance & Administration

                                    INVESTORS:

                                    HALIFAX FUND, L.P.

                                    By:       Jeffrey E. Devers
                                             -------------------------------
                                    Name:     Jeffrey E. Devers
                                    Title:    President


                                    PALLADIN PARTNERS I, L.P.

                                    By:  PALLADIN GROUP L.P.
                                              Attorney-in-Fact

                                    By:       Jeffrey E. Devers
                                             -------------------------------
                                    Name:     Jeffrey E. Devers
                                    Title:    President


                                    PALLADIN OVERSEAS FUND LIMITED

                                    By:       PALLADIN GROUP L.P.
                                              Attorney-in-Fact

                                    By:       Jeffrey E. Devers
                                             -------------------------------
                                    Name:     Jeffrey E. Devers
                                    Title:    President

 [SIGNATURE PAGE TO ZITEL CORPORATION CONVERTIBLE SUBORDINATED DEBENTURE
 PURCHASE AGREEMENT]

                                     15


                                    THE GLENEAGLES FUND COMPANY

                                    By:       PALLADIN GROUP L.P.
                                              Attorney-in-Fact

                                    By:       Jeffrey E. Devers
                                             -------------------------------
                                    Name:     Jeffrey E. Devers
                                    Title:    President

                                    PALLADIN SECURITIES, LLC

                                    By:       Jeffrey E. Devers
                                             -------------------------------
                                    Name:     Jeffrey E. Devers
                                    Title:    President

                                    COLONIAL PENN LIFE INSURANCE COMPANY

                                    By:  PALLADIN GROUP L.P.
                                              Attorney-in-Fact

                                    By:       Jeffrey E. Devers
                                             -------------------------------
                                    Name:     Jeffrey E. Devers
                                    Title:    President

                                    LANCER SECURITIES LIMITED

                                    By:  PALLADIN GROUP L.P.
                                              Attorney-in-Fact

                                    By:       Jeffrey E. Devers
                                             -------------------------------
                                    Name:     Jeffrey E. Devers
                                    Title:    President

     [SIGNATURE PAGE TO ZITEL CORPORATION CONVERTIBLE SUBORDINATED DEBENTURE
PURCHASE AGREEMENT]

                                     16