Exhibit 10.23

ALL INDEBTEDNESS EVIDENCED HEREBY AND REFERENCED HEREIN IS SUBORDINATED IN RIGHT
OF  PAYMENT  TO THE PRIOR  PAYMENT  IN FULL OF ALL  INDEBTEDNESS  OWED TO FINOVA
CAPITAL CORPORATION

                                   NOTE MODIFICATION AGREEMENT

THIS NOTE  MODIFICATION  AGREEMENT  made and  entered  into as of the 1st day of
December  1999, by and between H. Irwin Levy  (hereinafter  called  "Payee") and
nStor Technologies, Inc., a Delaware corporation (hereinafter called "Maker").
                                      W I T N E S S E T H:


WHEREAS,  Payee is the holder of a Demand Note  executed by Maker dated April 1,
1999,  evidencing Maker's indebtedness to Payee in the original principal amount
of FIVE HUNDRED THOUSAND and 00/100ths U.S.  Dollars (U.S.  $500,000.00) (a copy
of said Demand Note is attached hereto and incorporated  herein as Exhibit"A");
and

WHEREAS on or about July 15, 1999, the above-described  Demand Note was modified
pursuant to a Note  Modification  Agreement to increase the principal  amount of
the Demand  Note from FIVE  HUNDRED  THOUSAND  and  00/100ths  US Dollars  (U.S.
$500,000.00)  to SEVEN HUNDRED FIFTY THOUSAND and 00/100ths  U.S.  Dollars (U.S.
$750,000,000); and

WHEREAS,  on or about  November  1, 1999,  the  above-described  Demand Note was
further  modified  pursuant to a Note  Modification  Agreement  to increase  the
principal  amount of the  Demand  Note from SEVEN  HUNDRED  FIFTY  THOUSAND  and
00/100ths  U.S.  Dollars  ($750,000.00)  to ONE MILLION and 00/100 U.S.  Dollars
($1,000,000.00 and

WHEREAS,  Maker desires to have  available to borrow under the line of credit an
additional  principal amount of FIVE HUNDRED THOUSAND and 00/100ths U.S. Dollars
(U.S.  $500,000.00)  pursuant to the attached  Demand Note,  and to increase the
Principal  Amount of the  attached  Demand Note to a total of ONE  MILLION  FIVE
HUNDRED THOUSAND and 00/100ths U.S. Dollars (U.S. $1,500,000.00); and

WHEREAS, Payee is willing to make available to Maker under the line of credit an
additional  sum of FIVE  HUNDRED  THOUSAND  AND  00/100ths  U.S.  Dollars  (U.S.
$500,000.00) and to increase the Principal Amount of the attached Demand Note to
a total Principal Amount of ONE MILLION FIVE HUNDRED THOUSAND and 00/100ths U.S.
Dollars (U.S. $1,500,000.00);

NOW,  THEREFORE,  in  consideration  of  the  premises  and  the  covenants  and
agreements  herein  contained,  the sum of TEN and 00/100ths U.S.  Dollars (U.S.
$10.00) and other good and valuable considerations,  the receipt and sufficiency
whereof is hereby acknowledged, the parties do hereby agree as follows:

     1.   The foregoing recitals are true and correct in all respects.

     2.   The  parties  hereby  agree that as of the 1st day of  December  1999,
          Payee  shall  make  available  to Maker  under  its line of  credit an
          additional  principal  sum of FIVE HUNDRED  THOUSAND and 00/100th U.S.
          Dollars  (U.S.  $500,000.00)  subject  to  the  terms  and  conditions
          contained in the Demand  Note, a copy of which is attached  hereto and
          incorporated herein as Exhibit "A".

     3.   The parties  further agree that as of December 1, 1999, the "Principal
          Amount" as that term is defined in the Demand Note attached hereto and
          incorporated  herein as Exhibit "A", shall  hereinafter mean the total
          sum of ONE MILLION FIVE HUNDRED  THOUSAND and 00/100ths  U.S.  Dollars
          (U.S. $1,500,000.00) which Maker has made available to Payee under its
          line of credit pursuant to said Demand Note.

     4.   The parties  hereby agree that the Principal  Amount,  as  hereinabove
          amended,  which is  outstanding  under the line of credit,  shall bear
          interest at the rate of ten percent (10%) per annum,  payable monthly,
          as set forth in the attached Demand Note,  until the Principal  Amount
          of the Demand Note as hereinabove amended is paid in full.

     5.   The  parties  hereby  agree and  acknowledge  that all other terms and
          conditions  as set forth in the attached  Demand Note shall remain the
          same  throughout the term of the note and shall apply to the Principal
          Amount of ONE MILLION FIVE HUNDRED THOUSAND and/00/100ths U.S. DOLLARS
          (U.S. $1,500,000.00).

     6.   The Maker hereby certifies,  confirms and agrees that the Demand Note,
          as hereinbefore and hereinabove modified and amended, is in full force
          and effect,  is valid and enforceable in accordance with its terms and
          conditions,  and is not subject to any defenses or offsets of any kind
          or nature whatsoever.

     7.   This  agreement  shall be binding  upon the  parties  hereto and their
          respective successors and assigns.

IN WITNESS WHEREOF, the parties hereto have caused these presents to be executed
on the day and year first above written.

Maker:
NStor Technologies, Inc.

By:  /S/ Diane Wong
___________________________________
Name:  Diane Wong
Title:  Controller


Payee:
By:  /S/ H. Irwin Levy
___________________________________
Name:   H. Irwin Levy



                                  Exhibit 10.24

ALL INDEBTEDNESS EVIDENCED HEREBY AND REFERENCED HEREIN IS SUBORDINATED IN RIGHT
OF  PAYMENT  TO THE PRIOR  PAYMENT  IN FULL OF ALL  INDEBTEDNESS  OWED TO FINOVA
CAPITAL CORPORATION


                           NOTE MODIFICATION AGREEMENT

THIS NOTE  MODIFICATION  AGREEMENT  made and entered  into as of the 16th day of
December  1999, by and between H. Irwin Levy  (hereinafter  called  "Payee") and
nStor Technologies, Inc., a Delaware corporation (hereinafter called "Maker").


                              W I T N E S S E T H:

          WHEREAS,  Payee is the holder of a Demand Note executed by Maker dated
     April 1, 1999,  evidencing  Maker's  indebtedness  to Payee in the original
     principal  amount of FIVE HUNDRED THOUSAND and 00/100ths U.S. Dollars (U.S.
     $500,000.00)   (a  copy  of  said  Demand  Note  is  attached   hereto  and
     incorporated herein as Exhibit "A"); and

          WHEREAS on or about July 15, 1999, the above-described Demand Note was
     modified  pursuant  to  a  Note  Modification  Agreement  to  increase  the
     principal  amount  of the  Demand  Note  from  FIVE  HUNDRED  THOUSAND  and
     00/100ths US Dollars (U.S. $500,000.00) to SEVEN HUNDRED FIFTY THOUSAND and
     00/100ths U.S. Dollars ($750,000,000); and

          WHEREAS, on or about November 1, 1999, the above-described Demand Note
     was further modified pursuant to a Note Modification  Agreement to increase
     the principal  amount of the Demand Note from SEVEN HUNDRED FIFTY  THOUSAND
     and 00/100ths U.S. Dollars  ($750,000.00) to ONE MILLION and 00/100ths U.S.
     Dollars ($1,000,000.00); and

          WHEREAS, on or about December 1, 1999, the above-described Demand Note
     was further modified pursuant to a Note Modification  Agreement to increase
     the principal amount of the Demand Note from ONE MILLION and 00/100ths U.S.
     Dollars  ($1,000,000.00)  to ONE MILLION  FIVE HUNDRED and  00/100ths  U.S.
     Dollars ($1,500,000.00); and

          WHEREAS,  Maker desires to have  available to borrow under the line of
     credit an additional principal amount of ONE HUNDRED THOUSAND and 00/100ths
     U.S.  Dollars  ($100,000.00)  pursuant to the attached  Demand Note, and to
     increase the Principal Amount of the attached Demand Note to a total of ONE
     MILLION SIX HUNDRED  THOUSAND and 00/100ths U.S.  Dollars  ($1,600,000.00);
     and

          WHEREAS, Payee is willing to make available to Maker under the line of
     credit an additional sum of ONE HUNDRED THOUSAND AND 00/100ths U.S. Dollars
     ($100,000.00)  and to increase the Principal  Amount of the attached Demand
     Note to a total  Principal  Amount of ONE MILLION SIX HUNDRED  THOUSAND and
     00/100ths U.S. Dollars ($1,600,000.00).

          NOW, THEREFORE, in consideration of the premises and the covenants and
     agreements  herein  contained,  the sum of TEN and 00/100ths  U.S.  Dollars
     ($10.00)  and other  good and  valuable  considerations,  the  receipt  and
     sufficiency whereof is hereby acknowledged,  the parties do hereby agree as
     follows:

     1.   The foregoing recitals are true and correct in all respects.

     2.   The parties  hereby  agree that as of the 16th day of  December  1999,
          Payee  shall  make  available  to Maker  under  its line of  credit an
          additional  principal  sum of ONE HUNDRED  THOUSAND and 00/100th  U.S.
          Dollars ($100,000.00) subject to the terms and conditions contained in
          the Demand Note, a copy of which is attached  hereto and  incorporated
          herein as Exhibit "A".

     3.   The parties further agree that as of December 16, 1999, the "Principal
          Amount" as that term is defined in the Demand Note attached hereto and
          incorporated  herein as Exhibit "A", shall  hereinafter mean the total
          sum of ONE MILLION SIX HUNDRED  THOUSAND and  00/100ths  U.S.  Dollars
          ($1,600,000.00) which Maker has made available to Payee under its line
          of credit pursuant to said Demand Note.

     4.   The parties  hereby agree that the Principal  Amount,  as  hereinabove
          amended,  which is  outstanding  under the line of credit,  shall bear
          interest at the rate of ten percent (10%) per annum,  payable monthly,
          as set forth in the attached Demand Note,  until the Principal  Amount
          of the Demand Note as hereinabove amended is paid in full.

     5.   The  parties  hereby  agree and  acknowledge  that all other terms and
          conditions  as set forth in the attached  Demand Note shall remain the
          same  throughout the term of the note and shall apply to the Principal
          Amount of ONE MILLION SIX HUNDRED THOUSAND  and/00/100ths U.S. DOLLARS
          ($1,600,000.00).

     6.   The Maker hereby certifies,  confirms and agrees that the Demand Note,
          as hereinbefore and hereinabove modified and amended, is in full force
          and effect,  is valid and enforceable in accordance with its terms and
          conditions,  and is not subject to any defenses or offsets of any kind
          or nature whatsoever.

     7.   This  agreement  shall be binding  upon the  parties  hereto and their
          respective successors and assigns.

     IN   WITNESS  WHEREOF,  the parties hereto have caused these presents to be
          executed on the day and year first above written.

Maker:
nStor Technologies, Inc.

By:  /S/ Diane Wong
_____________________________________
Name:  Diane Wong
Title:  Controller


Payee:

By:  /S/ H. Irwin Levy
_____________________________________
Name:   H. Irwin Levy


                                 Exhibit 10.25


April 12, 2000


nStor Technologies, Inc.

Re:  Financing

Gentlemen:

This letter  confirms that the  undersigned has agreed to commit to a $2,000,000
revolving  line of  credit  facility  to  nStor  Technologies  until  nStor  has
successfully  completed an agreement with a financial  institution for a line of
credit which would finance  nStor's daily  operations (the"Bank Closing Date").

The terms of this  commitment will be based on interest at 10% per annum payable
monthly,  with a maturity  date based on the earlier of the Bank Closing Date or
April 30, 2001.

Very truly yours,

/s/ H. Irwin Levy
___________________
H. Irwin Levy


HIL:bf


100 Century Boulevard
West Palm Beach, FL  33417