EXHIBIT 4.3

                            SECURITIES PURCHASE AGREEMENT

    SECURITIES PURCHASE AGREEMENT (this "AGREEMENT"), dated as of May 21, 1997,
by and among Zitel Corporation, a California corporation, with headquarters
located at 47211 Bayside Parkway, Fremont, California 94538 (the "COMPANY"), and
each of the purchasers set forth on the signature pages hereto (the "BUYERS").

    WHEREAS: 

A.  The Company and the Buyers are executing and delivering this Agreement in
reliance upon the exemption from securities registration afforded by Rule 506
under Regulation D ("REGULATION D") as promulgated by the United States
Securities and Exchange Commission (the "SEC") under the Securities Act of 1933,
as amended (the "1933 ACT");

B.  The Buyers desire to purchase and the Company desires to issue and sell,
upon the terms and conditions set forth in this Agreement, convertible
subordinated debentures of the Company, in the form attached hereto as EXHIBIT
"A", in the aggregate principal amount of Twenty-Five Million Dollars
($25,000,000), convertible into shares of common stock, no par value per share,
of the Company (the "COMMON STOCK"), upon the terms and subject to the
limitations and conditions set forth in such debentures;

C.  Each Buyer wishes to purchase, upon the terms and conditions stated in this
Agreement, such convertible debentures of the Company in the principal amount
set forth immediately below its name on the signature pages hereto; and

D.  Contemporaneous with the execution and delivery of this Agreement, the
parties hereto are executing and delivering a Registration Rights Agreement, in
the form attached hereto as EXHIBIT "B" (the "REGISTRATION RIGHTS AGREEMENT"),
pursuant to which the Company has agreed to provide certain registration rights
under the 1933 Act and the rules and regulations promulgated thereunder, and
applicable state securities laws; 


    NOW THEREFORE, the Company and each of the Buyers (severally and not
jointly) hereby agree as follows:

    1.   PURCHASE AND SALE OF DEBENTURES.

         a.   Purchase of Debentures.  The Company shall issue and sell to each
Buyer and each Buyer severally agrees to purchase from the Company such
principal amount of convertible subordinated debentures as is set forth
immediately below such Buyer's name on the signature pages 

                                 Exhibit 4.3 - Page 1



hereto (collectively, together with any debenture(s) issued in replacement
thereof in accordance with the terms thereof, the "DEBENTURES") for an aggregate
principal amount of Twenty-Five Million Dollars ($25,000,000).

         b.   Form of Payment.  On the Closing Date (as defined below), (i)
each Buyer shall pay the purchase price for the Debentures to be issued and sold
to it (the "PURCHASE PRICE") by wire transfer of immediately available funds to
the Company, in accordance with the Company's written wiring instructions,
against delivery of the Debentures in the principal amount equivalent to the
Purchase Price, and (ii) the Company shall deliver such Debentures duly executed
on behalf of the Company, to the Buyer, against delivery of such Purchase Price.
         
         c.   Closing Date.  Subject to the satisfaction (or waiver) of the
conditions thereto set forth in Section 6 and Section 7 below, the date and time
of the issuance and sale of the Debentures pursuant to this Agreement (the
"CLOSING DATE") shall be 12:00 noon Eastern Standard Time on May 22, 1997 or
such other mutually agreed upon time.  The closing of the transactions
contemplated by this Agreement (the "CLOSING") shall occur on the Closing Date
at the offices of LaSalle National Bank, 135 South LaSalle Street, Chicago,
Illinois 60603 (the "ESCROW AGENT").

         d.   Escrow.  Notwithstanding anything to the contrary contained
herein pertaining to deliveries at Closing, the Closing may be conducted through
the Escrow Agent as set forth in that certain escrow agreement dated May 19,
1997 by and between the Company, Rochon Capital Group, Ltd. and the Escrow
Agent.

    2.   BUYER'S REPRESENTATIONS AND WARRANTIES.

    Each Buyer severally represents and warrants to the Company that:

         a.   Investment Purpose.  As of the date hereof, the Buyer is
purchasing the Debentures and any and all shares of Common Stock issuable
thereunder or under the Registration Rights Agreement (including, but not
limited to, Common Stock issuable upon conversion of the principal and interest
of the Debentures or shares issuable pursuant to the damage provisions of the
Debentures and Registration Rights Agreement) (the "CONVERSION SHARES" and,
collectively with the Debentures, the "SECURITIES") for its own account for
investment only and not with a present view towards the public sale or
distribution thereof, except pursuant to sales registered or exempted under the
1933 Act.

         b.   Accredited Investor Status.  The Buyer is an "accredited
investor" as that term is defined in Rule 501(a) of Regulation D.

         c.   Reliance on Exemptions.  The Buyer understands that the
Securities are being offered and sold to it in reliance upon specific exemptions
from the registration requirements of United States federal and state securities
laws and that the Company is relying upon the truth and accuracy of, 

                                 Exhibit 4.3 - Page 2



and the Buyer's compliance with, the representations, warranties, agreements,
acknowledgments and understandings of the Buyer set forth herein in order to
determine the availability of such exemptions and the eligibility of the Buyer
to acquire the Securities.

         d.   Information.  The Buyer and its advisors, if any, have been
furnished with all materials relating to the business, finances and operations
of the Company and materials relating to the offer and sale of the Securities
which have been requested by the Buyer or its advisors.  The Buyer and its
advisors, if any, have been afforded the opportunity to ask questions of the
Company and have received what the Buyer believes to be satisfactory answers to
any such inquiries.  The Company has provided the Buyer with a document dated
May 20, 1997, containing certain risk factors relating to the Company and the
Buyer has reviewed the risk factors set forth therein.  Neither such inquiries
or review nor any other due diligence investigation conducted by Buyer or any of
its advisors or representatives shall modify, amend or affect Buyer's right to
rely on the Company's representations and warranties contained in Section 3
below.  The Buyer understands that its investment in the Securities involves a
significant degree of risk.  

         e.   Governmental Review.  The Buyer understands that no United States
federal or state agency or any other government or governmental agency has
passed upon or made any recommendation or endorsement of the Securities.

         f.   Transfer or Resale.  The Buyer understands that (i) except as
provided in the Registration Rights Agreement, the Securities have not been and
are not being registered under the 1933 Act or any applicable state securities
laws, and may not be transferred unless (a) subsequently registered thereunder,
or (b) the Buyer shall have delivered to the Company an opinion of counsel
(which opinion shall be reasonably acceptable to the Company) to the effect that
the Securities to be sold or transferred may be sold or transferred pursuant to
an exemption from such registration or (c) sold pursuant to Rule 144 promulgated
under the 1933 Act (or a successor rule); (ii) any sale of such Securities made
in reliance on Rule 144 may be made only in accordance with the terms of said
Rule and further, if said Rule is not applicable, any resale of such Securities
under circumstances in which the seller (or the person through whom the sale is
made) may be deemed to be an underwriter (as that term is defined in the 1933
Act) may require compliance with some other exemption under the 1933 Act or the
rules and regulations of the SEC thereunder; and (iii) neither the Company nor
any other person is under any obligation to register such Securities under the
1933 Act or any state securities laws or to comply with the terms and conditions
of any exemption thereunder (in each case, other than pursuant to the
Registration Rights Agreement).  

         g.   Legends.  The Buyer understands that the Debentures and, until
such time as the Conversion Shares have been registered under the 1933 Act, as
contemplated by the Registration Rights Agreement, the Conversion Shares, may
bear a restrictive legend in substantially the following form (and a 
stop-transfer order may be placed against transfer of the certificates for such
Securities):

    "The securities represented by this certificate have not been registered
    under the Securities Act 

                                 Exhibit 4.3 - Page 3


    of 1933, as amended.  The securities have been acquired for investment
    and may not be sold, transferred or assigned in the absence of an
    effective registration statement for the securities under said Act, or
    an opinion of counsel, in form, substance and scope reasonably
    acceptable to the Company, that registration is not required under
    said Act or unless sold pursuant to Rule 144 under said Act."

    The legend set forth above shall be removed and the Company shall issue a
certificate without such legend to the holder of any Security upon which it is
stamped, if, unless otherwise required by applicable state securities laws, (a)
such Security is registered for sale under an effective registration statement
filed under the 1933 Act, or (b) such holder provides the Company with an
opinion of counsel, in form, substance and scope reasonably acceptable to the
Company, to the effect that a public sale or transfer of such Security may be
made without registration under the 1933 Act or (c) such holder provides the
Company with reasonable assurances that such Security can be sold pursuant to
Rule 144 under the 1933 Act (or a successor rule thereto) without any
restriction as to the number of Securities acquired as of a particular date that
can then be immediately sold.  The Buyer agrees to sell all Securities,
including those represented by a certificate(s) from which the legend has been
removed, only pursuant to (i) a registration statement with respect to which the
Buyer has been notified (and Buyer has not received any contrary written notice)
is effective under the 1933 Act, or (ii) advice of counsel that such sale is
exempt from the registration requirements of Section 5 of the 1933 Act. 

         h.   Authorization; Enforcement. This Agreement and the Registration
Rights Agreement have been duly and validly authorized, executed and delivered
on behalf of the Buyer and are valid and binding agreements of the Buyer
enforceable in accordance with their terms.

         i.   Residency.  The Buyer is a resident of the jurisdiction set forth
immediately below such Buyer's name on the signature pages hereto. 

    3.   REPRESENTATIONS AND WARRANTIES OF THE COMPANY.

    The Company represents and warrants to each Buyer that:

         a.   Organization and Qualification.  The Company and each of its
Subsidiaries (as defined below), if any, is a corporation duly organized,
validly existing and in good standing under the laws of the jurisdiction in
which it is incorporated, with full power and authority (corporate and other) to
own, lease, use and operate its properties and to carry on its business as and
where now owned, leased, used, operated and conducted.  SCHEDULE 3(a) sets forth
a list of all of the Subsidiaries of the Company and the jurisdiction in which
each is incorporated.  The Company and each of its Subsidiaries is duly
qualified as a foreign corporation to do business and is in good standing in
every jurisdiction in which the nature of the business conducted by it makes
such qualification necessary except where the failure to be so qualified or in
good standing would not have a Material Adverse Effect.  "MATERIAL ADVERSE
EFFECT" means any material adverse effect on the operations, assets, financial
condition or prospects of the Company and its Subsidiaries, taken as a whole, or
on the transactions contemplated 

                                 Exhibit 4.3 - Page 4


hereby or by the agreements or instruments to be entered into in connection
herewith.  "SUBSIDIARIES" means any corporation or other organization, whether
incorporated or unincorporated, in which the Company owns, directly or
indirectly, any equity or other ownership interest.

         b.   Authorization; Enforcement.  (i) The Company has all requisite
corporate power and authority to enter into and perform this Agreement, the
Registration Rights Agreement and the Debentures and to consummate the
transactions contemplated hereby and thereby and to issue the Securities, in
accordance with the terms hereof and thereof, (ii) the execution and delivery of
this Agreement, the Registration Rights Agreement and the Debentures by the
Company and the consummation by it of the transactions contemplated hereby and
thereby (including without limitation the issuance of the Debentures and the
issuance and reservation for issuance of the Conversion Shares issuable upon
conversion or exercise thereof) have been duly authorized by the Company's Board
of Directors and no further consent or authorization of the Company, its Board
or Directors, or its shareholders is required, (iii) this Agreement has been
duly executed and delivered by the Company, and (iv) this Agreement constitutes,
and upon execution and delivery by the Company of the Registration Rights
Agreement and the Debentures, each of such instruments will constitute, a legal,
valid and binding obligation of the Company enforceable against the Company in
accordance with its terms.

         c.   Capitalization.  As of the date hereof, the authorized capital
stock of the Company consists of (i) 40,000,000 shares of Common Stock of which
15,270,928 shares are issued and outstanding, 2,318, 246 shares are reserved for
issuance pursuant to the Company's stock option plans, no shares are reserved
for issuance pursuant to securities (other than the Debentures) exercisable for,
or convertible into or exchangeable for shares of Common Stock and 3,000,000
shares are reserved for issuance upon conversion of the Debentures (subject to
adjustment pursuant to the Company's covenant set forth in Section 4(h) below);
and (ii) 1,000,000 shares of preferred stock, none of which shares are issued
and outstanding (excluding 200,000 shares of preferred stock reserved for
issuance pursuant to the Company's rights plans).  All of such outstanding
shares of capital stock are, or upon issuance will be, duly authorized, validly
issued, fully paid and nonassessable.  No shares of capital stock of the Company
are subject to preemptive rights or any other similar rights of the stockholders
of the Company or any liens or encumbrances imposed through the actions or
failure to act of the Company.  Except as disclosed in SCHEDULE 3(c), as of the
effective date of this Agreement, (i) there are no outstanding options,
warrants, scrip, rights to subscribe for, puts, calls, rights of first refusal,
agreements, understandings, claims or other commitments or rights of any
character whatsoever relating to, or securities or rights convertible into or
exchangeable for  any shares of capital stock of the Company or any of its
Subsidiaries, or arrangements by which the Company or any of its Subsidiaries is
or may become bound to issue additional shares of capital stock of the Company
or any of its Subsidiaries, and (ii) there are no agreements or arrangements
under which the Company or any of its Subsidiaries is obligated to register the
sale of any of its or their securities under the 1933 Act (except the
Registration Rights Agreement) and (iii) there are no anti-dilution or price
adjustment provisions contained in any security issued by the Company (or in any
agreement providing rights to security holders) that will be triggered by the
issuance of the Debentures or Conversion Shares.  The 

                                 Exhibit 4.3 - Page 5


Company has furnished to the Buyer true and correct copies of the Company's
Restated Certificate of Incorporation as in effect on the date hereof
("CERTIFICATE OF INCORPORATION"), the Company's By-laws, as in effect on the
date hereof (the "BY-LAWS"), and the terms of all securities convertible into or
exercisable for Common Stock of the Company and the material rights of the
holders thereof in respect thereto.  The Company shall provide the Buyer with a
written update of this representation signed by the Company's Chief Executive or
Chief Financial Officer on behalf of the Company as of the Closing Date.

         d.   Issuance of Shares.  The Conversion Shares are duly authorized
and, upon issuance in accordance with the terms of this Agreement (including the
issuance of the Conversion Shares upon conversion of the Debentures) will be
validly issued, fully paid and non-assessable, and free from all taxes, liens
and charges with respect to the issue thereof and shall not be subject to
preemptive rights or other similar rights of stockholders of the Company.  The
term Conversion Shares includes the shares of Common Stock issuable upon
conversion of the Debentures, including without limitation, such additional
shares, if any, as are issuable as a result of the events described in Section
2(c) of the Registration Rights.  The Company understands and acknowledges the
potentially dilutive effect to the Common Stock of the issuance of the
Conversion Shares upon conversion of the Debentures.

         e.   No Conflicts.  The execution, delivery and performance of this
Agreement, the Registration Rights Agreement and the Debentures by the Company
and the consummation by the Company of the transactions contemplated hereby and
thereby (including, without limitation, the issuance and reservation for
issuance of the Conversion Shares) will not (i) conflict with or result in a
violation of any provision of the Certificate of Incorporation or By-laws, (ii)
violate or conflict with, or result in a breach of any provision of, or
constitute a default (or an event which with notice or lapse of time or both
could become a default) under, or give to others any rights of termination,
amendment, acceleration or cancellation of, any agreement, indenture or
instrument to which the Company or any of its Subsidiaries is a party, or result
in a violation of any law, rule, regulation, order, judgment or decree
(including federal and state securities laws and regulations) applicable to the
Company or any of its Subsidiaries or by which any property or asset of the
Company or any of its Subsidiaries is bound or affected (except for such
conflicts, defaults, terminations, amendments, accelerations, cancellations and
violations as would not, individually or in the aggregate, have a Material
Adverse Effect) or (iii) cause the Buyers, or any of them, to be deemed to be an
Acquiring Person, as that term is defined in the Rights Agreement dated as of
June 12, 1996 between the Company and American Stock Transfer & Trust Company,
as rights agent (the "Rights Agreement"), assuming that the Buyers are not
Affiliates or Associates, as such terms are defined in the Rights Agreement. 
Neither the Company nor any of its Subsidiaries is in violation of its
Certificate of Incorporation, By-laws or other organizational documents and
neither the Company nor any of its Subsidiaries is in default (and no event has
occurred which with notice or lapse of time or both could put the Company or any
of its Subsidiaries in default) under, and neither the Company nor any of its
Subsidiaries has taken any action or failed to take any action that would give
to others any rights of termination, amendment, acceleration or cancellation of,
any agreement, indenture or instrument to which the Company or any of its
Subsidiaries is a party or by 

                                 Exhibit 4.3 - Page 6


which any property or assets of the Company or any of its Subsidiaries is bound
or affected, except for possible defaults as would not, individually or in the
aggregate, have a Material Adverse Effect. The businesses of the Company and its
Subsidiaries, if any, are not being conducted, and shall not be conducted so
long as a Buyer owns any of the Securities, in violation of any law, ordinance
or regulation of any governmental entity, except for involuntary violations
which either singly or in the aggregate do not have a Material Adverse Effect. 
Except as specifically contemplated by this Agreement and as required under the
1933 Act and any applicable state securities laws, the Company is not required
to obtain any consent, authorization or order of, or make any filing or
registration with, any court or governmental agency or any regulatory or self
regulatory agency in order for it to execute, deliver or perform any of its
obligations under this Agreement, the Registration Rights Agreement or the
Debentures in accordance with the terms hereof or thereof.  Except as disclosed
in SCHEDULE 3(e), all consents, authorizations, orders, filings and
registrations, which the Company is required to obtain pursuant to the preceding
sentence, have been obtained or effected on or prior to the date hereof.  The
Company is not in violation of the listing requirements of the Nasdaq National
Market ("NASDAQ") and does not reasonably anticipate that the Common Stock will
be delisted by Nasdaq in the foreseeable future.

         f.   SEC Documents, Financial Statements.  Since September 30, 1994,
the Company has timely filed all reports, schedules, forms, statements and other
documents required to be filed by it with the SEC pursuant to the reporting
requirements of the Exchange Act of 1934, as amended (the "1934 ACT") (all of
the foregoing filed prior to the date hereof and all exhibits included therein
and financial statements and schedules thereto and documents (other than
exhibits) incorporated by reference therein, being hereinafter referred to
herein as the "SEC DOCUMENTS").  The Company has delivered to each Buyer true
and complete copies of the SEC Documents, except for such exhibits and
incorporated documents.  As of their respective dates, the SEC Documents
complied in all material respects with the requirements of the 1934 Act and the
rules and regulations of the SEC promulgated thereunder applicable to the SEC
Documents, and none of the SEC Documents, at the time they were filed with the
SEC, contained any untrue statement of a material fact or omitted to state a
material fact required to be stated therein or necessary in order to make the
statements therein, in light of the circumstances under which they were made,
not misleading.  As of their respective dates, the financial statements of the
Company included in the SEC Documents complied as to form in all material
respects with applicable accounting requirements and the published rules and
regulations of the SEC with respect thereto.  Such financial statements have
been prepared in accordance with generally accepted accounting principles,
consistently applied, during the periods involved (except (i) as may be
otherwise indicated in such financial statements or the notes thereto, or (ii)
in the case of unaudited interim statements, to the extent they may not include
footnotes or may be condensed or summary statements) and fairly present in all
material respects the consolidated financial position of the Company and its
consolidated Subsidiaries as of the dates thereof and the consolidated results
of their operations and cash flows for the periods then ended (subject, in the
case of unaudited statements, to normal year-end audit adjustments).  Except as
set forth in the financial statements of the Company included in the SEC
Documents, the Company has no liabilities, contingent or otherwise, other than
(i) liabilities incurred in the ordinary course of business subsequent to
September 30, 1996 and (ii) 

                                 Exhibit 4.3 - Page 7


obligations under contracts and commitments incurred in the ordinary course of
business and not required under generally accepted accounting principles to be
reflected in such financial statements, which, individually or in the aggregate,
are not material to the financial condition or operating results of the Company.


         g.   Absence of Certain Changes.  Since September 30, 1996, there has
been no material adverse change and no material adverse development in the
assets, liabilities, business, properties, operations, financial condition,
results of operations or prospects of the Company or any of its Subsidiaries,
except as disclosed in SCHEDULE 3(g).

         h.   Absence of Litigation.  There is no action, suit, claim,
proceeding, inquiry or investigation before or by any court, public board,
government agency, self-regulatory organization or body pending or, to the
knowledge of the Company or any of its Subsidiaries, threatened against or
affecting the Company or any of its Subsidiaries that could have a Material
Adverse Effect.  SCHEDULE 3(h) contains a complete list and summary description
of any pending or threatened proceeding against or affecting the Company or any
of its Subsidiaries, without regard to whether it would have a Material Adverse
Effect.

         i.   Patents, Copyrights, etc.  The Company and each of its
Subsidiaries owns or possesses the requisite licenses or rights to use all
patents, patent rights, inventions, know-how, trade secrets, trademarks, service
marks, service names, trade names and copyrights (collectively, the
"INTELLECTUAL PROPERTY") necessary to enable it to conduct its business as now
operated (and, except as set forth in SCHEDULE 3(i) hereof, to the best of the
Company's knowledge, as presently contemplated to be operated in the future);
there is no claim or action by any person pertaining to, or proceeding pending,
or to the Company's knowledge threatened which challenges the right of the
Company or of a Subsidiary with respect to any Intellectual Property necessary
to enable it to conduct its business as now operated (and, except as set forth
in SCHEDULE 3(i) hereof, to the best of the Company's knowledge, as presently
contemplated to be operated in the future); to the best of the Company's
knowledge, the Company's or its Subsidiaries, current and intended products,
services and processes do not infringe on any Intellectual Property or other
rights held by any person; and the Company is unaware of any facts or
circumstances which might give rise to any of the foregoing.  The Company and
each of its Subsidiaries have taken reasonable security measures to protect the
secrecy, confidentiality and value of their Intellectual Property.

         j.   No Materially Adverse Contracts, Etc.  Neither the Company nor
any of its Subsidiaries is subject to any charter, corporate or other legal
restriction, or any judgment, decree, order, rule or regulation which in the
judgment of the Company's officers has or is expected in the future to have a
Material Adverse Effect.  Neither the Company nor any of its Subsidiaries is a
party to any contract or agreement which in the judgment of the Company's
officers has or is expected to have a Material Adverse Effect.

         k.   Tax Status.  Except as set forth on SCHEDULE 3(k), the Company
and each of 

                                 Exhibit 4.3 - Page 8


its Subsidiaries has made or filed all federal and state income and all other
tax returns, reports and declarations required by any jurisdiction to which it
is subject (unless and only to the extent that the Company and each of its
Subsidiaries has set aside on its books provisions reasonably adequate for the
payment of all unpaid and unreported taxes) and has paid all taxes and other
governmental assessments and charges that are material in amount, shown or
determined to be due on such returns, reports and declarations, except those
being contested in good faith and has set aside on its books provisions
reasonably adequate for the payment of all taxes for periods subsequent to the
periods to which such returns, reports or declarations apply.  There are no
unpaid taxes in any material amount claimed to be due by the taxing authority of
any jurisdiction, and the officers of the Company know of no basis for any such
claim.

         l.   Certain Transactions.  Except as set forth on SCHEDULE 3(l) and
except for arm's length transactions pursuant to which the Company or any of its
Subsidiaries makes payments in the ordinary course of business upon terms no
less favorable than the Company or any of its Subsidiaries could obtain from
third parties and other than the grant of stock options disclosed on SCHEDULE
3(c), none of the officers, directors, or employees of the Company is presently
a party to any transaction with the Company or any of its Subsidiaries (other
than for services as employees, officers and directors), including any contract,
agreement or other arrangement providing for the furnishing of services to or
by, providing for rental of real or personal property to or from, or otherwise
requiring payments to or from any officer, director or such employee or, to the
knowledge of the Company, any corporation, partnership, trust or other entity in
which any officer, director, or any such employee has a substantial interest or
is an officer, director, trustee or partner.

         m.   Disclosure.  All information relating to or concerning the
Company or any of its Subsidiaries set forth in this Agreement and provided to
the Buyers pursuant to Section 2(d) hereof and otherwise in connection with the
transactions contemplated hereby is true and correct in all material respects
and the Company has not omitted to state any material fact necessary in order to
make the statements made herein or therein, in light of the circumstances under
which they were made, not misleading.  No event or circumstance has occurred or
exists with respect to the Company or any of its Subsidiaries or its or their
business, properties, prospects, operations or financial conditions, which,
under applicable law, rule or regulations, requires public disclosure or
announcement by the Company but which has not been so publicly announced or
disclosed (assuming for this purposes that the Company's reports filed under the
1934 Act are being incorporated into an effective registration statement filed
by the Company under the 1933 Act).

         n.   Acknowledgment Regarding Buyers' Purchase of Debentures.  The
Company acknowledges and agrees that the Buyers are acting solely in the
capacity of arm's length purchasers with respect to this Agreement and the
transactions contemplated hereby.  The Company further acknowledges that no
Buyer is acting as a financial advisor or fiduciary of the Company (or in any
similar capacity) with respect to this Agreement and the transactions
contemplated hereby and any advice given by any Buyer or any of their respective
representatives or agents in connection with this Agreement and the transactions
contemplated hereby is merely incidental to the Buyers, purchase of 

                                 Exhibit 4.3 - Page 9



the Debentures.  The Company further represents to each Buyer that the Company's
decision to enter into this Agreement has been based solely on the independent
evaluation of the Company and its representatives.

         o.   No Integrated Offering.  Neither the Company, nor any of its
affiliates, nor any person acting on its or their behalf, has directly or
indirectly made any offers or sales in any security or solicited any offers to
buy any security under circumstances that would require registration under the
1933 Act of the issuance of the Securities to the Buyers.  The issuance of the
Securities to the Buyers will not be integrated with any other issuance of the
Company's securities which requires stockholder approval under the rules of The
Nasdaq Stock Market.

         p.   No Brokers.  The Company has taken no action which would give
rise to any claim by any person for brokerage commissions, finder's fees or
similar payments relating to this Agreement or the transactions contemplated
hereby, except for dealings with Rochon Capital Group, Ltd., whose commissions
and fees will be paid for by the Company.  

         q.   Permits; Compliance.  The Company and each of its Subsidiaries is
in possession of all franchises, grants, authorizations, licenses, permits,
easements, variances, exemptions, consents, certificates, approvals and orders
necessary to own, lease and operate its properties and to carry on its business
as it is now being conducted (collectively, the "COMPANY PERMITS"), and there is
no action pending or, to the knowledge of the Company, threatened regarding
suspension or cancellation of any of the Company Permits.  Neither the Company
nor any of its Subsidiaries is in conflict with, or in default or violation of,
any of the Company Permits, except for any such conflicts, defaults or
violations which, individually or in the aggregate, would not reasonably be
expected to have a Material Adverse Effect.  During the period commencing on
September 30, 1996 and ending on the date hereof, neither the Company nor any of
its Subsidiaries has received any notification with respect to possible
conflicts, defaults or violations of applicable laws, except for notices
relating to possible conflicts, defaults or violations, which conflicts,
defaults or violations would not have a Material Adverse Effect.

         r.   Environmental Matters.

              (i)  Except as set forth in SCHEDULE 3(r), there are, to the
Company's knowledge, with respect to the Company or any of its Subsidiaries or
any predecessor of the Company, no past or present violations of Environmental
Laws (as defined below), releases of any material into the environment, actions,
activities, circumstances, conditions, events, incidents, or contractual
obligations which may give rise to any common law environmental liability or any
liability under the Comprehensive Environmental Response, Compensation and
Liability Act of 1980 or similar federal, state, local or foreign laws and
neither the Company nor any of its Subsidiaries has received any notice with
respect to any of the foregoing, nor is any action pending or, to the Company's
knowledge, threatened in connection with any of the foregoing.  The term
"ENVIRONMENTAL LAWS" means all federal, state, local or foreign laws relating to
pollution or protection of human health or the 

                                Exhibit 4.3 - Page 10


environment (including, without limitation, ambient air, surface water,
groundwater, land surface or subsurface strata), including, without limitation,
laws relating to emissions, discharges, releases or threatened releases of
chemicals, pollutants contaminants, or toxic or hazardous substances or wastes
(collectively, "HAZARDOUS MATERIALS") into the environment, or otherwise
relating to the manufacture, processing, distribution, use, treatment, storage,
disposal, transport or handling of Hazardous Materials, as well as all
authorizations, codes, decrees, demands or demand letters, injunctions,
judgments, licenses, notices or notice letters, orders, permits, plans or
regulations issued, entered, promulgated or approved thereunder.

              (ii) Other than those that are or were stored, used or disposed
of in compliance with applicable law, no Hazardous Materials are contained on or
about any real property currently owned, leased or used by the Company or any of
its Subsidiaries, and no Hazardous Materials were released on or about any real
property previously owned, leased or used by the Company or any of its
Subsidiaries during the period the property was owned, leased or used by the
Company or any of its Subsidiaries, except in the normal course of the Company's
or any of its Subsidiaries' business.

              (iii) Except as set forth in SCHEDULE 3(r), there are no
underground storage tanks on or under any real property owned, leased or used by
the Company or any of its Subsidiaries that are not in compliance with
applicable law.  

         s.   Title to Property.  The Company and its Subsidiaries have good
and marketable title in fee simple to all real property and good and marketable
title to all personal property owned by them which is material to the business
of the Company and its Subsidiaries, in each case free and clear of all liens,
encumbrances and defects except such as are described in SCHEDULE 3(s) or such
as would not have a Material Adverse Effect.  Any real property and facilities
held under lease by the Company and its Subsidiaries are held by them under
valid, subsisting and enforceable leases with such exceptions as would not have
a Material Adverse Effect.

         t.   Insurance.  The Company and each of its Subsidiaries are insured
by insurers of recognized financial responsibility against such losses and risks
and in such amounts as management of the Company believes to be prudent and
customary in the businesses in which the Company and its subsidiaries are
engaged.  Neither the Company nor any such Subsidiary has any reason to believe
that it will not be able to renew its existing insurance coverage as and when
such coverage expires or to obtain similar coverage from similar insurers as may
be necessary to continue its business at a cost that would not have a Material
Adverse Effect.

    4.   COVENANTS.

         a.   Best Efforts.  The parties shall use their best efforts to
satisfy timely each of the conditions described in Section 6 and 7 of this
Agreement.  


                                Exhibit 4.3 - Page 11



         b.   Form D; Blue Sky Laws.  The Company agrees to file a Form D with
respect to the Securities as required under Regulation D and to provide a copy
thereof to each Buyer promptly after such filing.  The Company shall, on or
before the Closing Date, take such action as the Company shall reasonably
determine is necessary to qualify the Securities for sale to the Buyers at the
applicable closing pursuant to this Agreement under applicable securities or
"blue sky" laws of the states of the United States (or to obtain an exemption
from such qualification), and shall provide evidence of any such action so taken
to each Buyer on or prior to such Closing Date.

         c.   Reporting Status; Eligibility to Use Form S-3.  The Company's
Common Stock is registered under Section 12(g) of the 1934 Act.  So long as any
Buyer beneficially owns any of the Securities, the Company shall timely file all
reports required to be filed with the SEC pursuant to the 1934 Act, and the
Company shall not terminate its status as an issuer required to file reports
under the 1934 Act even if the 1934 Act or the rules and regulations thereunder
would permit such termination.  The Company currently meets, and will take all
necessary action to continue to meet, the "registrant eligibility" requirements
as set forth in the general instructions to Form S-3.  The Company currently
meets the "registrant eligibility" requirements for primary issuances set forth
in the general instructions to Form S-3.

         d.   Use of Proceeds.  The Company shall use the proceeds from the
sale of the Debentures in the manner set forth in SCHEDULE 4(d) attached hereto
and made a part hereof  and shall not, directly or indirectly, use such proceeds
for any loan to or investment in any other corporation, partnership, enterprise
or other person (except in connection with its currently existing direct or
indirect Subsidiaries).

         e.   Additional Equity Capital; Right of First Refusal.  Subject to
the exceptions described below, the Company agrees that during the period
beginning on the date hereof and ending sixty (60) days following the Closing
Date (the "LOCK-UP PERIOD"), the Company will not, without the prior written
consent of a majority-in-interest of the Buyers, negotiate or contract with any
party to obtain additional equity financing (including debt financing with an
equity component).  In addition, subject to the exceptions described below, the
Company will not conduct any equity financing (including debt with an equity
component) ("FUTURE OFFERINGS") during the period beginning on the first day
immediately following the Lock-Up Period and ending one hundred eighty (180)
days thereafter unless it shall have first delivered to each Buyer, at least
fifteen (15) business days prior to the closing of such Future Offering, written
notice describing the proposed Future Offering, including the terms and
conditions thereof, and providing each Buyer an option during the ten (10) day
period following delivery of such notice to purchase its pro rata share (based
on the ratio that the principal amount of Debentures purchased by it hereunder
bears to the aggregate principal amount of Debentures purchased hereunder) of
the securities being offered in the Future Offering on the same terms as
contemplated by such Future Offering (the limitations referred to in this and
the immediately preceding sentence are collectively referred to as the "CAPITAL
RAISING LIMITATIONS").  The Capital Raising Limitations shall not apply to any
transaction involving (i) issuances of securities in a firm commitment
underwritten public offering (excluding a continuous offering pursuant to Rule
415 under 

                                Exhibit 4.3 - Page 12



the 1933 Act) or (ii) issuances of securities in connection with a merger,
consolidation or sale of assets, or in connection with any strategic partnership
or joint venture (the primary purpose of which is not to raise equity capital),
or in connection with the disposition or acquisition of a business, product or
license by the Company.  The Capital Raising Limitations also shall not apply to
the issuance of securities upon exercise or conversion of the Company's options,
warrants or other convertible securities outstanding as of the date hereof or to
the grant of additional options or warrants, or the issuance of additional
securities, under any Company stock option or restricted stock plan approved by
a majority of the Company's disinterested directors.

         f.   Expenses.  Each party to this Agreement shall bear its own
expenses, whether or not the transactions contemplated hereby are consummated.

         g.   Financial Information.  The Company agrees to send the following
reports to each Buyer until such Buyer transfers, assigns, or sells all of the
Securities: (i) within ten (10) days after the filing with the SEC, a copy of
its Annual Report on Form 10-K, its Quarterly Reports on Form 10-Q and any
Current Reports on Form 8-K; (ii) within one (1) day after release, copies of
all press releases issued by the Company or any of its Subsidiaries; and (iii)
contemporaneously with the making available or giving to the stockholders of the
Company, copies of any notices and other information the Company makes available
or gives to such stockholders.

         h.   Reservation of Shares.  The Company shall at all times have
authorized, and reserved for the purpose of issuance, a sufficient number of
shares of Common Stock to provide for the full conversion of the outstanding
Debentures and issuance of the Conversion Shares in connection therewith (based
on the Conversion Price of the Debentures in effect from time to time). The
Company shall not reduce the number of shares of Common Stock reserved for
issuance upon conversion of the Debentures without the consent of each Buyer,
which consent will not be unreasonably withheld.  The Company shall use its best
efforts at all times to maintain the number of shares of Common Stock so
reserved for issuance at no less than two (2) times the number that is then
actually issuable upon full conversion of the Debentures (based on the
Conversion Price of the Debentures in effect from time to time).

         i.   Listing.  The Company shall promptly secure the listing of the
Conversion Shares upon each national securities exchange or automated quotation
system, if any, upon which shares of Common Stock are then listed (subject to
official notice of issuance) and shall maintain, so long as any other shares of
Common Stock shall be so listed, such listing of all Conversion Shares from time
to time issuable upon conversion of the Debentures.  The Company will take all
action necessary to obtain and maintain the listing and trading of its Common
Stock on Nasdaq, the Nasdaq SmallCap Market ("NASDAQ SMALLCAP"), the New York
Stock Exchange ("NYSE"), or the American Stock Exchange ("AMEX") and will comply
in all respects with the Company's reporting, filing and other obligations under
the bylaws or rules of the National Association of Securities Dealers ("NASD")
and such exchanges, as applicable.


                                Exhibit 4.3 - Page 13


         j.   Corporate Existence.  So long as a Buyer beneficially owns any
Debentures, the Company shall maintain its corporate existence and shall not
sell all or substantially all of the Company's assets, except in the event of a
merger or consolidation or sale of all or substantially all of the Company's
assets, where (i) the surviving or successor entity in such transaction (A)
assumes the Company's obligations hereunder and under the agreements and
instruments entered into in connection herewith and (B) is a publicly traded
corporation whose Common Stock is listed for trading on Nasdaq, Nasdaq SmallCap,
NYSE or AMEX or (ii) the Debentures are prepaid in accordance with Article IV
thereof.

         k.   Solvency.  The Company (both before and after giving effect to
the transactions contemplated by this Agreement) is solvent (I.E., its assets
have a fair market value in excess of the amount required to pay its probable
liabilities on its existing debts as they become absolute and matured) and
currently the Company has no information that would lead it to reasonably
conclude that the Company would not have, nor does it intend to take any action
that would impair, its ability to pay its debts from time to time incurred in
connection therewith as such debts mature; PROVIDED, HOWEVER that the Buyer
hereby acknowledge (i) that the Company does not currently have funds reserved
specifically for repayment of the Debentures and (ii) that the Company expects
all amounts payable under the Debentures to be converted into Common Stock in
accordance with Article I thereof.  The Company did not receive a qualified
opinion from its auditors with respect to its most recent fiscal year end and
does not anticipate or know of any basis upon which its auditors might issue a
qualified opinion in respect of its current fiscal year.

    5.   TRANSFER AGENT INSTRUCTIONS.

    The Company shall issue irrevocable instructions to its transfer agent to
issue certificates, registered in the name of each Buyer or its nominee, for the
Conversion Shares in such amounts as specified from time to time by each Buyer
to the Company upon proper conversion of the Debentures (the "Irrevocable
Transfer Agent Instructions").  Prior to registration of the Conversion Shares
under the 1933 Act, all such certificates shall bear the restrictive legend
specified in Section 2(g) of this Agreement.  The Company warrants that no
instruction other than the Irrevocable Transfer Agent Instructions referred to
in this Section 5, and stop transfer instructions to give effect to Section 2(f)
hereof (in the case of the Conversion Shares, prior to registration of the
Conversion Shares under the 1933 Act), will be given by the Company to its
transfer agent and that the Securities shall otherwise be freely transferable on
the books and records of the Company as and to the extent provided in this
Agreement and the Registration Rights Agreement.  Nothing in this Section shall
affect in any way the Buyer's obligations and agreement set forth in Section
2(g) hereof to comply with all applicable prospectus delivery requirements, if
any, upon resale of the Securities.  If a Buyer provides the Company with an
opinion of counsel, reasonably satisfactory to the Company in form, substance
and scope, that registration of a resale by such Buyer of any of the Securities
is not required under the 1933 Act, the Company shall permit the transfer, and,
in the case of the Conversion Shares, promptly instruct its transfer agent to
issue one or more certificates in such name and in such denominations as
specified by such Buyer.  The Company acknowledges that a breach by it of its
obligations hereunder 

                                Exhibit 4.3 - Page 14



will cause irreparable harm to the Buyers, by obliterating the intent and
purpose of the transaction contemplated hereby.  Accordingly, the Company
acknowledges that the remedy at law for a breach of its obligations under this
Section 5 will be inadequate and agrees, in the event of a breach or threatened
breach by the Company of the provisions of this Section, that the Buyers shall
be entitled, in addition to all other available remedies, to an injunction
restraining any breach and requiring immediate transfer, without the necessity
of showing economic loss and without any bond or other security being required.

    6.   CONDITIONS TO THE COMPANY'S OBLIGATION TO SELL.

    The obligation of the Company hereunder to issue and sell the Debentures to
a Buyer at the Closing is subject to the satisfaction, at or before the Closing
Date, of each of the following conditions thereto, provided that these
conditions are for the Company's sole benefit and may be waived by the Company
at any time in its sole discretion.  The obligation of the Company to issue and
sell the Debentures to any Buyer hereunder is distinct and separate from its
obligation to issue and sell Debentures to any other Buyer hereunder and any
failure by one or more Buyers to fulfill the conditions set forth herein or to
consummate the purchase of Debentures hereunder will not relieve the Company of
its obligations with respect to any other Buyer:

         a.   The applicable Buyer shall have executed this Agreement and the
Registration Rights Agreement, and delivered the same to the Company.

         b.   The applicable Buyer shall have delivered the Purchase Price in
accordance with Section 1(b) above.

         c.   The representations and warranties of the applicable Buyer shall
be true and correct in all material respects as of the date when made and as of
the Closing Date as though made at that time (except for representations and
warranties that speak as of a specific date), and the applicable Buyer shall
have performed, satisfied and complied in all material respects with the
covenants, agreements and conditions required by this Agreement to be performed,
satisfied or complied with by the applicable Buyer at or prior to the Closing
Date.

         d.   No statute, rule, regulation, executive order, decree, ruling or
injunction shall have been exacted, entered, promulgated or endorsed by any
court or governmental authority of competent jurisdiction or any self-regulatory
organization having authority over the matters contemplated hereby which
prohibits the consummation of any of the transactions contemplated by this
Agreement.

         e.   The aggregate amount of the Purchase Price received by the
Company from all Buyers shall be at least Twenty Million Dollars ($20,000,000)
and, in the event that less than $20,000,000 is received by the Company for the
purchase of the Debentures, the Company will promptly return or cause to be
returned to the Buyers that have wired funds to the Company all of the funds
received from such Buyers.

                                Exhibit 4.3 - Page 15


    7.   CONDITIONS TO EACH BUYER'S OBLIGATION TO PURCHASE.

    The obligation of each Buyer hereunder to purchase the Debentures at the
Closing, is subject to the satisfaction, at or before the Closing Date of each
of the following conditions, provided that these conditions are for such Buyer's
sole benefit and may be waived by such Buyer at any time in its sole discretion:

         a.   The Company shall have executed this Agreement and the
Registration Rights Agreement, and delivered the same to the Buyer.

         b.   The Company shall have delivered to such Buyer duly executed
Debentures being so purchased in accordance with Section 1(b) above.

         c.   The Irrevocable Transfer Agent Instructions, in form and
substance satisfactory to a majority-in-interest of the Buyers, shall have been
delivered to and acknowledged in writing by the Company's Transfer Agent.

         d.   The representations and warranties of the Company shall be true
and correct in all material respects as of the date when made and as of the
Closing Date as though made at such time (except for representations and
warranties that speak as of a specific date) and the Company shall have
performed, satisfied and complied in all material respects with the covenants,
agreements and conditions required by this Agreement to be performed, satisfied
or complied with by the Company at or prior to the Closing Date.  The Buyer
shall have received a certificate or certificates, executed by the chief
executive officer of the Company, dated as of the Closing Date, to the foregoing
effect and as to such other matters as may be reasonably requested by such
Buyer, including, but not limited to, certifications with respect to the
Company's Certificate of Incorporation, By-laws and Board of Directors'
resolutions relating to the transactions contemplated thereby.

         e.   No statute, rule, regulation, executive order, decree, ruling or
injunction shall have been exacted, entered, promulgated or endorsed by any
court or governmental authority of competent jurisdiction or any self-regulatory
organization having authority over the matters contemplated hereby which
prohibits the consummation of any of the transactions contemplated by this
Agreement.

         f.   The Buyer shall have received an opinion of the Company's
counsel, dated as of the Closing Date, in form, scope and substance reasonably
satisfactory to the Buyer and in substantially the same form as EXHIBIT "C"
attached hereto.

         g.   The Buyer shall have received an officer's certificate described
in Section 3(c) above, dated as of the Closing Date.



                                Exhibit 4.3 - Page 16


         h.   The Common Stock shall have been authorized for quotation on
Nasdaq and trading thereon shall not have been suspended by the SEC or Nasdaq.

    8.   GOVERNING LAW; MISCELLANEOUS.  

         a.   Governing Law.  This Agreement shall be governed by and
interpreted in accordance with the laws of the California without regard to the
principles of conflict of laws.  

         b.   Counterparts; Signatures by Facsimile.  This Agreement may be
executed in two or more counterparts, all of which shall be considered one and
the same agreement and shall become effective when counterparts have been signed
by each party and delivered to the other party.  This Agreement, once executed
by a party, may be delivered to the other party hereto by facsimile transmission
of a copy of this Agreement bearing the signature of the party so delivering
this Agreement.

         c.   Headings.  The headings of this Agreement are for convenience of
reference and shall not form part of, or affect the interpretation of, this
Agreement.  

         d.   Severability.  If any provision of this Agreement shall be
invalid or unenforceable in any jurisdiction, such invalidity or
unenforceability shall not affect the validity or enforceability of the
remainder of this Agreement or the validity or enforceability of this Agreement
in any other jurisdiction.  

         e.   Entire Agreement; Amendments.  This Agreement and the instruments
referenced herein contain the entire understanding of the parties with respect
to the matters covered herein and therein and, except as specifically set forth
herein or therein, neither the Company nor the Buyer makes any representation,
warranty, covenant or undertaking with respect to such matters.  No provision of
this Agreement may be waived or amended other than by an instrument in writing
signed by the party to be charged with enforcement.  

         f.   Notices.  Any notices required or permitted to be given under the
terms of this Agreement shall be sent by certified or registered mail (return
receipt requested) or delivered personally or by courier (including a recognized
overnight delivery service) or by facsimile and shall be effective five days
after being placed in the mail, if mailed by regular U.S. mail, or upon receipt,
if delivered personally or by courier (including a recognized overnight delivery
service) or by facsimile, in each case addressed to a party.  The addresses for
such communications shall be:

    If to the Company:

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

                                Exhibit 4.3 - Page 17


    With copy to:

    Cooley Godward Castro Huddleson & Tatum
    One Maritime Plaza, 20th Floor
    San Francisco, California  94111-3580
    Attention:  John Cardoza, Esquire
    Facsimile:  (415) 951-3699

    If to a Buyer:  To the address set forth immediately below such Buyer's
name on the signature pages hereto.

    Each party shall provide notice to the other party of any change in
address.

         g.   Successors and Assigns.  This Agreement shall be binding upon and
inure to the benefit of the parties and their successors and assigns.  Neither
the Company nor any Buyer shall assign this Agreement or any rights or
obligations hereunder without the prior written consent of the other. 
Notwithstanding the foregoing, any Buyer may assign its rights hereunder to any
person that purchases Securities in a private transaction from a Buyer or to any
of its "affiliates," as that term is defined under the 1934 Act, without the
consent of the Company.

         h.   Third Party Beneficiaries.  This Agreement is intended for the
benefit of the parties hereto and their respective permitted successors and
assigns, and is not for the benefit of, nor may any provision hereof be enforced
by, any other person.

         i.   Survival.  The representations and warranties of the Company and
the agreements and covenants set forth in Sections 3, 4, 5 and 8 shall survive
the closing hereunder notwithstanding any due diligence investigation conducted
by or on behalf of the Buyers.  The Company agrees to indemnify and hold
harmless each of the Buyers and all their officers, directors, employees and
agents for loss or damage arising as a result of or related to any breach or
alleged breach by the Company of any of its representations, warranties and
covenants set forth in Sections 3 and 4 hereof or any of its covenants and
obligations under this Agreement, the Registration Rights Agreement and the
Debentures, including advancement of expenses as they are incurred.

         j.   Publicity.  The Company and each of the Buyers shall have the
right to review a reasonable period of time before issuance of any press
releases, SEC, Nasdaq or NASD filings, or any other public statements with
respect to the transactions contemplated hereby; PROVIDED, HOWEVER, that the
Company shall be entitled, without the prior approval of each of the Buyers, to
make any press release or SEC, Nasdaq or NASD filings with respect to such
transactions as is required by applicable law and regulations (although each of
the Buyers shall be consulted by the Company in connection with any such press
release prior to its release and shall be provided with a copy thereof and be
given an opportunity to comment thereon).


                                Exhibit 4.3 - Page 18


         k.   Further Assurances.  Each party shall do and perform, or cause to
be done and performed, all such further acts and things, and shall execute and
deliver all such other agreements, certificates, instruments and documents, as
the other party may reasonably request in order to carry out the intent and
accomplish the purposes of this Agreement and the consummation of the
transactions contemplated hereby.

         l.   No Strict Construction.  The language used in this Agreement will
be deemed to be the language chosen by the parties to express their mutual
intent, and no rules of strict construction will be applied against any party.













                  [REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK]




















                                Exhibit 4.3 - Page 19


    IN WITNESS WHEREOF, the undersigned Buyers and the Company have caused this
Agreement to be duly executed as of the date first above written.


ZITEL CORPORATION

By:      Henry C. Harris 
Name:    Henry C. Harris
Its:     Chief Financial officer


RGC INTERNATIONAL INVESTORS, LDC

By:  Rose Glen Capital Management, L.P.,
     Investment Manager
By:  RGC General Partner Corp.

SIGNATURE:

By:      Wayne D. Bloch
Name:    Wayne D. Bloch
Its:     Managing Director


RESIDENCE:   Cayman Islands

ADDRESS:

    440 E. Swedesford Road
    Suite 2025
    Wayne, PA  19087
    Facsimile:  (610) 971-2212
    Telephone:  (610) 902-0200
    

AGGREGATE SUBSCRIPTION AMOUNT:

    Aggregate Purchase Price:                                 $8,333,333.33





                                Exhibit 4.3 - Page 20



HALIFAX FUND, L.P.

By:  Palladin Group L.P., as attorney in fact
By:  Palladin Capital Management LLC, General Partner

SIGNATURE:

By:      Andrew Kaplan
Name:    Andrew Kaplan
Its:     Senior Vice President 


RESIDENCE:   Cayman Islands

ADDRESS:

    c/o Palladin Group L.P.
    40 West 57th Street
    New York, NY  10019
    Facsimile:  (212) 698-0599
    Telephone:  (212) 698-0515
    

AGGREGATE SUBSCRIPTION AMOUNT:

    Aggregate Purchase Price:                                 $8,333,333.33

















                                Exhibit 4.3 - Page 21


NELSON PARTNERS

SIGNATURE:

By:      Anne Dupuy
Name:    Anne Dupuy
Its:     Officer 


RESIDENCE:   Bermuda

ADDRESS:

    c/o Leeds Management Services
    129 Front Street, 5th Floor
    Hamilton HM12 Bermuda
    Facsimile:  (441) 292-2239
    Telephone:  (441) 295-8617
    Attention:  Anne Dupuy
    
    With a copy to:

    Citidel Investment Group, L.L.C.
    225 West Washington Street
    Chicago,  Illinois  60606
    Facsimile:  (312) 368-4347
    Telephone:  (312) 696-2165
    Attention:  Kenneth A. Simpler

AGGREGATE SUBSCRIPTION AMOUNT:

    Aggregate Purchase Price:                                 $4,166,666.67











                                Exhibit 4.3 - Page 22



OLYMPUS SECURITIES, LTD.

SIGNATURE:

By:      Anne Dupuy
Name:    Anne Dupuy
Its:     Alternate Director 


RESIDENCE:   Bermuda

ADDRESS:

    c/o Leeds Management Services
    129 Front Street, 5th Floor
    Hamilton HM12 Bermuda
    Facsimile:  (441) 292-2239
    Telephone:  (441) 295-8617
    Attention:  Anne Dupuy
    
    With a copy to:

    Citidel Investment Group, L.L.C.
    225 West Washington Street
    Chicago,  Illinois  60606
    Facsimile:  (312) 368-4347
    Telephone:  (312) 696-2165
    Attention::  Kenneth A. Simpler

AGGREGATE SUBSCRIPTION AMOUNT:

    Aggregate Purchase Price:                                 $4,166,666.67











                                Exhibit 4.3 - Page 23