JTS CORP
SC 13D/A, 1997-11-10
COMPUTER STORAGE DEVICES
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 1)*



                                 JTS CORPORATION
                                (Name of Issuer)


                     Common Stock, par value $.001 per share
                         (Title of Class of Securities)

                                   4659401 04
                                 (CUSIP Number)

                             Emanuel J. Adler, Esq.
                              Tenzer Greenblatt LLP
                 405 Lexington Avenue, New York, New York 10174
                                 (212) 885-5000


            (Name, Address and Telephone Number of Person Authorized
                      to Receive Notice and Communications)

                                October 14, 1997
             (Date of Event which Requires Filing of this Statement)


     If the filing  person has  previously  filed a statement on Schedule 13G to
     report the  acquisition  which is the subject of this  Schedule 13D, and is
     filing  this  schedule  because  of  Rule  13d-1(b)(3)  or (4),  check  the
     following box |_|.

     Note: Six copies of this statement, including all exhibits, should be filed
     with the Commission. See Rule 13d-1(a) for other parties to whom copies are
     to be sent.

*    The  remainder  of this  cover  page  shall be filled  out for a  reporting
     person's  initial  filing on this form with respect to the subject class of
     securities,  and for any subsequent amendment containing  information which
     would alter disclosures provided in a prior cover page.

     The  information  required on the remainder of this cover page shall not be
     deemed to be  "filed"  for the  purpose  of  Section  18 of the  Securities
     Exchange  Act of 1934 ("Act") or otherwise  subject to the  liabilities  of
     that section of the Act but shall be subject to all other provisions of the
     Act (however, see the Notes).

                                Page 1 of 5 Pages


                                

<PAGE>



                                  SCHEDULE 13D

- --------------------                                          ------------------
CUSIP NO. 4659401 04                                          Page 2 of 4 Pages
- --------------------                                          ------------------


- --------------------------------------------------------------------------------
1    NAME OF REPORTING PERSON
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


          Amber Arbitrage LDC

- --------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) |_|
                                                                        (b) |_|

- --------------------------------------------------------------------------------
3    SEC USE ONLY



- --------------------------------------------------------------------------------
4    SOURCE OF FUNDS*

         WC
- --------------------------------------------------------------------------------

5    CHECK BOX IF DISCLOSURE OF LEGAL  PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS
     2(d) or 2(e) |_|



- --------------------------------------------------------------------------------
6    CITIZENSHIP OR PLACE OF ORGANIZATION


       Cayman Islands

- --------------------------------------------------------------------------------
                     7         SOLE VOTING POWER

    NUMBER OF                     75,608,373
      SHARES       -------------------------------------------------------------
   BENEFICIALLY      8         SHARED VOTING POWER                              
     OWNED BY                                                                   
       EACH                       30,000,016                                    
    REPORTING      -------------------------------------------------------------
      PERSON         9         SOLE DISPOSITIVE POWER                           
       WITH                                                                     
                                  75,608,373                                    
                   -------------------------------------------------------------
                     10        SHARED DISPOSITIVE POWER                         
                                                                                
                                  -0-                                           
- --------------------------------------------------------------------------------
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

         105,608,389
- --------------------------------------------------------------------------------
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN 
     SHARES*                                                                 |_|



- --------------------------------------------------------------------------------
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        47.7%1

- --------------------------------------------------------------------------------
14   TYPE OF REPORTING PERSON*

              CO

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


                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEM 1-7 (INCLUDING EXHIBITS)
OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.

- ----------
1    Includes 30,000,016 shares for which the Reporting Person has shared voting
     power.

                                Page 2 of 5 Pages


                                

<PAGE>



     This Amendment No. 1 amends the Schedule 13D dated October 6, 1997 of Amber
Arbitrage  LDC ("Amber")  with respect to the common stock,  par value $.001 per
share ("Common Stock"), issued by JTS Corporation (the "Corporation"). Except as
modified hereby, there has been no change in the information previously reported
in the Schedule 13D dated October 6, 1997 of Amber.

Item 5. Interest in Securities of the Issuer.

     (a)  - (b)

     According  to the  information  provided  to the  Reporting  Person  by the
Corporation,  there were, as of September 26, 1997, 158,283,990 shares of Common
Stock of the Corporation issued and outstanding.

     The Reporting Person has sole voting and dispositive  power over 75,608,373
shares of Common Stock, comprised of (i) 12,312,600 shares of Common Stock owned
of record by Pax Clearing Company Limited  Partnership,  the Reporting  Person's
clearing  firm,  (ii)  60,765,000  shares  of  Common  Stock  issuable  upon the
conversion of 12,153 shares of the  Corporation's  Series D Preferred Stock (the
"Series D Shares"), and (iii) 2,530,773 shares of Common Stock issuable upon the
conversion  of that  portion  of the 10,705  Series D Shares of the  Corporation
remaining in escrow with Cooley  Goodward  LLP  pursuant to an escrow  agreement
dated  September  25,  1997,  (the  "Escrow")  as more  fully  described  in the
Reporting Person's initial Statement on Schedule 13D dated September 25, 1997.

     The  Reporting  Person has the sole  power to vote and  dispose of all such
securities.

     Pursuant to Rule 13d-1  promulgated  under the  Securities  Exchange Act of
1934, as amended,  the shares of Common Stock  described in this Item 5(a) - (b)
constitute 47.7% of the outstanding shares of Common Stock.

     (c) Since  September  25,  1997 (the date of the event which  required  the
Reporting  Person to file its  initial  statement  on Schedule  13D),  Amber has
disposed  of  2,616,100  shares  of  Common  Stock  in  over-the-counter  market
transactions on the American Stock Exchange, as follows:


                                                             Sale Price
                 Date                   Shares                Per Share
                 ----                   ------                ---------
               09/30/97                245,800                 $0.6250
               09/30/97                  2,400                 $0.6875
               10/01/97                103,600                 $0.6250
               10/01/97                  2,000                 $0.6875
               10/02/97                  8,000                 $0.6250
               10/02/97                101,000                 $0.6875


                                Page 3 of 5 Pages


                                

<PAGE>


                                                             Sale Price
                 Date                   Shares                Per Share
                 ----                   ------                ---------
               10/03/97                374,800                 $0.6250
               10/03/97                  3,600                 $0.6875
               10/06/97                222,700                 $0.6250
               10/06/97                  2,000                 $0.6875
               10/07/97                283,600                 $0.5625
               10/07/97                600,000                 $0.6250
               10/08/97                118,500                 $0.5625
               10/08/97                  1,000                 $0.6250
               10/09/97                  5,000                 $0.6250
               10/10/97                  2,000                 $0.6250
               10/13/97                  2,000                 $0.6250
               10/14/97                182,100                 $0.5625
               10/14/97                  6,000                 $0.6250
               10/15/97                 51,000                 $0.6250
               10/16/97                 60,000                 $0.6250
               10/17/97                 10,000                 $0.6250
               10/17/97                101,000                 $0.6575
               10/20/97                 55,000                 $0.6875
               10/21/97                 48,000                 $0.6875
               10/22/97                 23,000                 $0.6875
               10/24/97                  1,000                 $0.6875
               



     On October 6, 1997,  the  Reporting  Person  disposed of $80,000  principal
amount of the 5.25% convertible  subordinated  debentures of the Corporation due
April 29, 2002 in one transaction  effected on the American Stock Exchange at an
aggregate sale price of $29,600.

     On October 16 and 23, 1997, the Reporting Person  authorized the release of
$2,539,250  and  $952,000,  respectively  from the  Escrow  and the  Corporation
authorized  the release of 2,902 and 1,088 Series D Shares,  respectively,  from
the Escrow, as more fully described in the Reporting  Person's initial statement
on Schedule 13D dated October 6, 1997.

     (d) The  Reporting  Person  affirms that no person other than the Reporting
Person  has the  right to  receive,  or the  power to  direct  the  receipt  of,
dividends  from, or the proceeds from the sale of, the  securities  owned by the
Reporting Person.


                                Page 4 of 5 Pages


                                

<PAGE>


     (e) It is  inapplicable  for the purposes herein to state the date on which
the  Reporting  Person  ceased to be the owner of more than five  percent of the
Common Stock of the Corporation.




                                    SIGNATURE

     After reasonable inquiry and to the best of its knowledge and belief, Amber
certifies that the information set forth in this statement is true, complete and
correct.

Dated: November 7, 1997


                                    AMBER ARBITRAGE LDC

                                    BY: LISMORE MANAGEMENT LTD.


                                    By: /s/ Peter Anderson
                                       ---------------------------------
                                    Name:  Peter Anderson
                                    Title: Director



                                Page 5 of 5 Pages


                                



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