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                                                                    EXHIBIT 4.7



THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER
THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE SOLD, PLEDGED, OR
OTHERWISE TRANSFERRED WITHOUT AN EFFECTIVE REGISTRATION THEREOF UNDER SUCH ACT
OR PURSUANT TO RULE 144 OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE
CORPORATION AND ITS COUNSEL, THAT SUCH REGISTRATION IS NOT REQUIRED.

                           WARRANT TO PURCHASE STOCK

       Corporation:              JT Storage, Inc., a Delaware Corporation
       Number of Shares:         50,000
       Class of Stock:           Common
       Initial Exercise Price:   $3.00 per share
       Issue Date:               December 18, 1995
       Expiration Date:          December 18, 2000

        THIS WARRANT CERTIFIES THAT, for the agreed upon value of $1.00 and for
other good and valuable consideration, SILICON VALLEY BANK ("Holder") is
entitled to purchase the number of fully paid and nonassessable shares of the
class of securities (the "Shares") of the corporation (the "Company") at the
initial exercise price per Share (the "Warrant Price") all as set forth above
and as adjusted pursuant to Article 2 of this Warrant, subject to the provisions
and upon the terms and conditions set forth in this Warrant.

ARTICLE 1.      EXERCISE

       1.1      METHOD OF EXERCISE. Holder may exercise this Warrant by
delivering a duly executed Notice of Exercise in substantially the form attached
as Appendix 1 to the principal office of the Company. Unless Holder is
exercising the conversion right set forth in Section 1.2, Holder shall also
deliver to the Company a check for the aggregate Warrant Price for the Shares
being purchased.

       1.2      CONVERSION RIGHT. In lieu of exercising this Warrant as
specified in Section 1.1, Holder may from time to time convert this Warrant, in
whole or in part, into a number of Shares determined by dividing (a) the
aggregate fair market value of the Shares or other securities otherwise issuable
upon exercise of this Warrant minus the aggregate Warrant Price of such Shares
by (b) the fair market value of one Share. The fair market value of the Shares
shall be determined pursuant Section 1.4.

       1.3      INTENTIONALLY OMITTED.

       1.4      FAIR MARKET VALUE. If the Shares are traded in a public market,
the fair market value of the Shares shall be the closing price of the Shares (or
the closing price of the Company's stock into which the Shares are convertible)
reported for the business day immediately before Holder delivers its Notice of
Exercise to the Company. if the Shares are not traded in a public market, the
Board of Directors of the Company shall determine fair market value in its
reasonable good faith judgment. The foregoing notwithstanding, if Holder advises
the Board of Directors in writing that Holder disagrees with such determination,
then the Company and Holder shall promptly agree upon a reputable investment
banking firm to undertake such valuation. If the valuation of such investment
banking firm is greater than that determined by the Board of Directors, then all
fees and expenses of such investment banking firm shall be paid by the Company.
In all other circumstances, such fees and expenses shall be paid by Holder.

       1.5      DELIVERY OF CERTIFICATE AND NEW WARRANT. Promptly after Holder
exercises or converts this Warrant, the Company shall deliver to Holder
certificates for the Shares acquired and, if this Warrant has




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not been fully exercised or converted and has not expired, a new Warrant
representing the Shares not so acquired.

        1.6  Replacement of Warrants.  On receipt of evidence reasonably
satisfactory to the Company of the loss, theft, destruction or mutilation of
this Warrant and, in the case of loss, theft or destruction, on delivery of an
indemnity agreement reasonably satisfactory in form and amount to the Company
or, in the case of mutilation, or surrender and cancellation of this Warrant,
the Company at its expense shall execute and deliver, in lieu of this Warrant,
a new warrant of like tenor.

        1.7  Repurchase on Sale, Merger, or Consolidation of the Company

             1.7.1.  "Acquisition".  For the purpose of this Warrant,
"Acquisition" means any sale, license, or other disposition of all or
substantially all of the assets of the Company, or any reorganization,
consolidation, or merger of the Company where the holders of the Company's
securities before the transaction beneficially own less than 50% of the
outstanding voting securities of the surviving entity after the transaction.

             1.7.2.  Assumption of Warrant.  If upon the closing of any
Acquisition the successor entity assumes the obligations of this Warrant, then
this Warrant shall be exercisable for the same securities, cash, and property
as would be payable for the Shares issuable upon exercise of the unexercised
portion of this Warrant as if such Shares were outstanding on the record date
for the Acquisition and subsequent closing.  The Warrant Price shall be
adjusted accordingly.

             1.7.3.  Nonassumption.  If upon the closing of any Acquisition the
successor entity does not assume the obligations of this Warrant and Holder has
not otherwise exercised this Warrant in full, then the unexercised portion of
this Warrant shall be deemed to have been automatically converted pursuant to
Section 1.2 and thereafter Holder shall participate in the acquisition on the
same terms as other holders of the same class of securities of the Company.

             1.7.4.  Purchase Right.  Notwithstanding the foregoing, at the
election of Holder, the Company shall purchase the unexercised portion of
this Warrant for cash upon the closing of any Acquisition for an amount equal
to (a) the fair market value of any consideration that would have been received
by Holder in consideration of the Shares had Holder exercised the unexercised
portion of this Warrant immediately before the record date for determining the
shareholders entitled to participate in the proceeds of the Acquisition, less
(b) the aggregate Warrant Price of the Shares, but in no event less than zero.


ARTICLE 2.  ADJUSTMENTS TO THE SHARES.

        2.1  Stock Dividends, Splits, Etc.  If the Company declares or pays a
dividend on its common stock (or the Shares if the Shares are securities other
than common stock) payable in common stock, or other securities, subdivides the
outstanding common stock into a greater amount of common stock, or, if the
Shares are securities other than common stock, subdivides the Shares in a
transaction that increases the amount of common stock into which the Shares are
convertible, then upon exercise of this Warrant, for each Share acquired, Holder
shall receive, without cost to Holder, the total number and kind of securities
to which Holder would have been entitled had Holder owned the Shares of record
as of the date the dividend or subdivision occurred.

        2.2  Reclassification, Exchange or Substitution.  Upon any
reclassification, exchange, substitution, or other event that results in a
change of the number and/or class of the securities issuable upon exercise or
conversion of this Warrant, Holder shall be entitled to receive, upon exercise
or conversion of this Warrant, the number and kind of securities and property
that Holder would have received for the Shares if this Warrant had been
exercised immediately before such reclassification, exchange, substitution, or
other event.  Such an event shall include any automatic conversion of the
outstanding or issuable securities of the Company of the same class or series
as the Shares to common 




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stock pursuant to the terms of the Company's Articles of Incorporation upon the
closing of a registered public offering of the Company's common stock.  The
Company or its successor shall promptly issue to Holder a new Warrant for such
new securities or other property.  The new Warrant shall provide for
adjustments which shall be as nearly equivalent as may be practicable to the
adjustments provided for in this Article 2 including, without limitation,
adjustments to the Warrant Price and to the number of securities or property
issuable upon exercise of the new Warrant.  The provisions of this Section 2.2
shall similarly apply to successive reclassifications, exchanges,
substitutions, or other events.

        2.3  Adjustments for Combinations, Etc.  If the outstanding Shares are
combined or consolidated, by reclassification or otherwise, into a lesser
number of shares, the Warrant Price shall be proportionately increased.

        2.4  Adjustments for Diluting Issuances.  The Warrant Price and the
number of Shares issuable upon exercise of this Warrant or, if the Shares are
Preferred Stock, the number of shares of common stock issuable upon conversion
of the Shares, shall be subject to adjustment, from time to time in the manner
set forth on Exhibit A in the event of Diluting issuances (as defined on
Exhibit A).

        2.5  No Impairment.  The Company shall not, by amendment of its
Articles of Incorporation or through a reorganization, transfer of assets,
consolidation, merger, dissolution, issue, or sale of securities or any other
voluntary action, avoid or seek to avoid the observance or performance of any
of the terms to be observed or performed under this Warrant by the Company, but
shall at all times in good faith assist in carrying out all the provisions of
this Article 2 and in taking all such action as may be necessary or
appropriate to protect Holder's rights under this Article against impairment.
If the Company takes any action affecting the Shares or its common stock other
than as described above that adversely affects Holder's rights under this
Warrant, the Warrant Price shall be adjusted downward and the number of Shares
issuable upon exercise of this Warrant shall be adjusted upward in such a
manner that the aggregate Warrant Price of this Warrant is unchanged.

        2.6  Fractional Shares.  No fractional Shares shall be issuable upon
exercise or conversion of the Warrant and the number of Shares to be issued
shall be rounded down to the nearest whole Share.  If a fractional share
interest arises upon any exercise or conversion of the Warrant, the Company
shall eliminate such fractional share interest by paying Holder amount computed
by multiplying the fractional interest by the fair market value of a full
Shares.

        2.7  Certificate as to Adjustments.  Upon each adjustment of the
Warrant Price, the Company at its expense shall promptly compute such
adjustment, and furnish Holder with a certificate of its Chief Financial
Officer setting forth such adjustment and the facts upon which such adjustment
is based.  The Company shall, upon written request, furnish Holder a
certificate setting forth the Warrant Price in effect upon the date thereof and
the series of adjustments leading to such Warrant Price.

ARTICLE 3.  REPRESENTATIONS AND COVENANTS OF THE COMPANY.

        3.1  Representations and Warranties. The Company hereby represents and
warrants to the Holder as follows:

             (a)  All Shares which may be issued upon the exercise of the
purchase right represented by this Warrant, and all securities, if any,
issuable upon conversion of the Shares, shall, upon issuance, be duly
authorized, validly issued, fully paid and nonassessable, and free of any liens
and encumbrances except for restrictions on transfer provided for herein or
under applicable federal and state securities laws.




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        3.2     Notice of Certain Events.  If the Company proposes at any time
(a) to declare any dividend or distribution upon its common stock, whether in
cash, property, stock, or other securities and whether or not a regular cash
dividend; (b) to offer for subscription pro rata to the holders of any class or
series of its stock any additional shares of stock of any class or series or
other rights; (c) to effect any reclassification or recapitalization of common
stock; (d) to merge or consolidate with or into any other corporation, or sell,
lease, license, or convey all or substantially all of its assets, or to
liquidate, dissolve or wind up; or (e) offer holders of registration rights the
opportunity to participate in an underwritten public offering of the Company's
securities for cash, then, in connection with each such event, the Company
shall give Holder (1) at least 20 days prior written notice of the date on
which a record will be taken for such dividend, distribution, or subscription
rights (and specifying the date on which the holders of common stock will be
entitled thereto) or for determining rights to vote, if any, in respect of the
matters referred to in (c) and (d) above; (2) in the case of the matters
referred to in (c) and (d) above at least 20 days prior written notice of the
date when the same will take place (and specifying the date on which the
holders of common stock will be entitled to exchange their common stock for
securities or other property deliverable upon the occurrence of such event);
and (3) in the case of the matter referred to in (e) above, the same notice as
is given to the holders of such registration rights.

        3.3     Information Rights.  So long as the Holder holds this Warrant
and/or any of the Shares, the Company shall deliver to the Holder (a) promptly
after mailing, copies of all notices or other written communications to the
shareholders of the Company, (b) within ninety (90) days after the end of each
fiscal year of the Company, the annual audited financial statements of the
Company certified by independent public accountants of recognized standing and
(c) such other financial statements required under and in accordance with any
loan documents between Holder and the Company (or if there are no such
requirements [or if the subject loan(s) no longer are outstanding]), then
within forty-five (45) days after the end of each of the first three quarters
of each fiscal year, the Company's quarterly, unaudited financial statements.

        3.4     Registration Under Securities Act of 1933, as amended.  The
Company agrees that the Shares or, if the Shares are convertible into common
stock of the Company, such common stock, shall be subject to the registration
rights set forth on Exhibit B, if attached.

ARTICLE 4.   MISCELLANEOUS

        4.1     Term; Notice of Expiration.  This Warrant is exercisable, in
whole or in part, at any time and from time to time on or before the Expiration
Date set forth above.  The Company shall give Holder written notice of Holder's
rights to exercise this Warrant in the form attached as Appendix 2 not more
than 90 days and not less than 30 days before the Expiration Date.  If the
notice is not so given, the Expiration Date shall automatically be extended
until 30 days after the date the Company delivers the notice to Holder.



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        4.2     Legends.  This Warrant and the Shares (and the securities
issuable, directly or indirectly, upon conversion of the Shares, if any) shall
be imprinted with a legend in substantially the following form:

        THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
        AS AMENDED, AND MAY NOT BE SOLD, PLEDGED OR OTHERWISE TRANSFERRED
        WITHOUT AN EFFECTIVE REGISTRATION THEREOF UNDER SUCH ACT OR PURSUANT TO
        RULE 144 OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE
        CORPORATION AND ITS COUNSEL THAT SUCH REGISTRATION IS NOT REQUIRED.

        4.3     Compliance with Securities Laws on Transfer.  This Warrant and
the Shares issuable upon the exercise of this Warrant (and the securities
issuable, directly or indirectly, upon conversion of the Shares, if any) may
not be transferred or assigned in whole or in part without compliance with
applicable federal and state securities laws by the transferor and the
transferee (including, without limitation, the delivery of investment
representation letters and legal opinions reasonably satisfactory to the
Company, as reasonably requested by the Company).  The Company shall not
require Holder to provide an opinion of counsel if the transfer is to an
affiliate of Holder or if there is no material question as to the availability
of current information as referenced in Rule 144(c).  Holder represents that it
has complied with Rule 144(d) and (e) in reasonable detail, the selling broker
represents that it has complied with Rule 144(f), and the Company is provided
with a copy of Holder's notice of proposed sale.

        4.4     Transfer Procedure.  Subject to the provisions of Section 4.2,
Holder may transfer all or part of this Warrant or the Shares issuable upon
exercise of this Warrant (or the securities issuable, directly or indirectly,
upon conversion of the Shares, if any) by giving the Company notice of the
portion of the Warrant being transferred setting forth the name, address and
taxpayer identification number of the transferee and surrendering this Warrant
to the Company for reissuance to the transferee(s) (and Holder if applicable).
Unless the Company is filing financial information with the Securities and
Exchange Commission ("SEC") pursuant to the Securities Exchange Act of 1934,
the Company shall have the right to refuse to transfer any portion of this
Warrant to any person who directly competes with the Company.

        4.5     Notices.  All notices and other communications from the Company
to the Holder, or vice versa, shall be deemed delivered and effective when
given personally or mailed by first-class registered or certified mail, postage
prepaid, at such address as may have been furnished to the Company or the
Holder, as the case may be, in writing by the Company or such holder from time
to time.

        4.6     Waiver.  This Warrant and any term hereof may be changed,
waived, discharged or terminated only by an instrument in writing signed by the
party against which enforcement of such change, waiver, discharge or
termination is sought.

        4.7     Attorneys' Fees.  In the event of any dispute between the
parties concerning the terms and provisions of this Warrant, the party
prevailing in such dispute shall be entitled to collect from the other party
all costs incurred in such dispute, including reasonable attorneys' fees.



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                                   APPENDIX 1

                               NOTICE OF EXERCISE

1.   The undersigned hereby elects to purchase _______ shares of the
Common/Series __________ Preferred [strike one] Stock of ________________
pursuant to the terms of the attached Warrant, and tenders herewith payment of
the purchase price of such shares in full.

1.   The undersigned hereby elects to convert the attached Warrant into
Shares/cash [strike one] in the manner specified in the Warrant. This conversion
is exercised with respect to ______________________ of the Shares covered by the
Warrant.

[Strike paragraph that does not apply.]

2.   Please issue a certificate or certificates representing said shares in the
name of the undersigned or in such other name as is specified below;

__________________________
(Name)

__________________________
(Address)

__________________________

3.   The undersigned represents it is acquiring the shares solely for its own
account and not as a nominee for any other party and not with a view toward the
resale or distribution thereof except in compliance with applicable securities
laws.

_______________________________
(Signature)


______________________
(Date)

                                 ___________________________________________


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                                   APPENDIX 2

                     NOTICE THAT WARRANT IS ABOUT TO EXPIRE

                           _________________________


(Name of Holder)

(Address of Holder)

Attn: Chief Financial Officer


Dear:

        This is to advise you that the Warrant issued to you described below
will expire on
______________________, 19___.

        Issuer:
        Issue Date:
        Class of Security Issuable:
        Exercise Price per Share:
        Number of Shares Issuable:
        Procedure for Exercise:

        Please contact [name of contact person at (phone number)] with any
questions you may have concerning exercise of the Warrant. This is your only
notice of pending expiration.


__________________________
(Name of Issuer)


By: ____________________________

Name: __________________________         ______________________________________

Title: _________________________



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                                   EXHIBIT A

                            Anti-Dilution Provisions

        In the event of the issuance (a "Diluting Issuance") by the Company,
after the Issue Date of the Warrant, of securities at a price per share less
than the Warrant Price, or, if the Shares are common stock, less than the then
conversion price of the Company's Series A Preferred Stock, then the number of
shares of common stock issuable upon conversion of the Shares, or if the Shares
are common stock, the number of Shares issuable upon exercise of the Warrant,
shall be adjusted as a result of Diluting Issuances in accordance with the
Holder's standard form of Anti-Dilution Agreement in effect on the Issue Date.

        Under no circumstances shall the aggregate Warrant Price payable by the
Holder upon exercise of the Warrant increase as a result of any adjustment
arising from a Diluting Issuance.



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                                   EXHIBIT B

                              Registration Rights

        The Shares (if common stock), or the common stock issuable upon
conversion of the Shares, shall be deemed "registrable securities" or otherwise
entitled to "piggy back" registration rights in accordance with the terms of the
following agreement (the "Agreement") between the Company and its investor(s):


        Registration Rights Agreement dated 2/3/95 and amended 8/7/95
        -------------------------------------------------------------

        Identify Agreement by date, title and parties. If no Agreement exists,
        indicate by "none".


        The Company agrees that no amendments will be made to the Agreement
which would have an adverse impact on Holder's registration rights thereunder
without the consent of Holder. By acceptance of the Warrant to which this
Exhibit B is attached. Holder shall be deemed to be a party to the Agreement.

        If no Agreement exists, then the Company and the Holder shall enter into
Holder's standard form of Registration Rights Agreement as in effect on the
Issue Date of the Warrant.




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