SEAGATE TECHNOLOGY, INC.
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                           (C)opyright 1993


ST-5660A (Decathlon 545 AT)

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 � REAR VIEW �
 �����������ͼ

        40 pin I/O Cable Connection
        �
   J1     ����������  ��������͸ /���������\    TOP (HDA)
    �����͵::::::::::�::::::::1�ͳ 0 0 0 0 ���
          ����������ͳ��������; ��5�G�G�12�    BOTTOM
                     �
ST-5660A              ���� pin-20 removed

��������������ͻ
�  Front View  �
��������������ͼ
                ��������������������� Slave drive ON (OFF for Master)
                � ������������������� Slave Present (used on Master)
                � � ����������������� Cable Select
                � � � ��������������� Ext. Spindle Clock Synch
 (TOP)          � � � � ������������� Remote LED (9-, 10+)
                � � � � � ����������� Reserved
                � � � � � �   ��pin-16          �34
 J8             o o o o o o   o o o o o o o o o o
Option Block   �1o o o o o o o o o o o o o o o o o�������PWA����������
                            � ����������������� �
 (BOTTOM)                   �    �              �
           pin-14 removed ���    �              �
                 Reserved ��������              �
     Force 1024 cylinders �����������������������

         Jumpers on 15-16, 21-22, 23-24 are spares.
         Cable Select also requires Slave and Slave Present jumpers ON.


                            ST-5660A
                            Decathlon 545 ATA

      UNFORMATTED CAPACITY _____________________
      FORMATTED CAPACITY (xx SECTORS) __________545.5
      ACTUATOR TYPE ____________________________VOICE COIL
      CYLINDERS __PHYSICAL______________________3420
      HEADS ______PHYSICAL______________________4
      DISCS (3.5 in) ___________________________2
      MEDIA TYPE _______________________________THIN FILM
      HEAD TYPE ________________________________THIN FILM
      RECORDING METHOD _________________________ZBR RLL (1,7)
      INTERNAL TRANSFER RATE (Mbits/sec) _______35 to 48
      EXTERNAL TRANSFER RATE (Mbytes/sec) ______up to 11.1
      PIO MODE _________________________________3
      DMA SUPPORT ______________________________EISA Type B
      SPINDLE SPEED (RPM) ______________________4,500
      AVERAGE LATENCY (mSEC) ___________________6.67
      BUFFER ___________________________________256 Kbyte SeaCache
       Read/Write Multiple, Read Look-Ahead,
       Multi-Segmented
      INTERFACE ________________________________AT
      SECTORS PER DRIVE ________________________
      TPI (TRACKS PER INCH) ____________________3,309
      BPI (BITS PER INCH) ______________________68,000
      AVERAGE ACCESS (ms) ______________________12
      SINGLE TRACK SEEK (ms) ___________________3.5
      MAX FULL SEEK (ms) _______________________30
      MTBF (power-on hours) Office _____________300,000
      SHOCK (G's):
               operating (Read/Write) __________2
               nonoperating ____________________75
      ACOUSTICS (dBa) __________________________34
      POWER DISSIPATION (watts) ________________
      POWER REQUIREMENTS: +12V START-UP (amps) _1.9
      POWER MANAGEMENT (Watts):
                          ACTIVE _______________5.5
                          IDLE _________________<2.5
                          STANDBY ______________0.7
      WRITE PRECOMP (cyl) ______________________N/A
      REDUCED WRITE CURRENT (cyl) ______________N/A
      LANDING ZONE (cyl) _______________________AUTO
      IBM AT DRIVE TYPE ________________________*

      Physical:
                       Height (inches/mm):     0.75/19
                       Width  (inches/mm):     4.02/102.1
                       Depth  (inches/mm):     5/127
                       Weight    (lbs/kg):     1.5/0.68


* MAY REQUIRE FORMATTING AND PARTITIONING SOFTWARE.  ALSO, CHECK TO
SEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE
AVAILABLE. (see below)

Possible translations:
                      This translation is generally acceptable, as
                      is, for non-DOS operating systems:
      1057 cyl, 16 heads, 63 sectors = 545,513,472

                      DOS operating systems may require a system bios
                      that accepts larger values for the CMOS head
                      parameter which lowers cylinders below 1024:
       528 cyl, 32 heads, 63 sectors = 544,997,376

                      Other FULL-CAPACITY solutions for DOS operating
                      systems include third-party drive preparation
                      software or bios driven host adapters. Otherwise,
                      capacity may be limited to:
      1024 cyl, 16 heads, 63 sectors = 528,482,304

Note: A "custom" or "user-definded" CMOS drivetype  may ask for a
numerical value for the Write Precompensation cylinder and for the
Landing Zone cylinder.  A basic rule-of-thumb for drive models that do
not require the old Write Precomp technique or a Landing Zone because
they are Auto-Parking is to add 1 to the cylinder value being used. As
an example: If cylinders equaled 820, then both Write Precomp and
Landing Zone would be entered as 821. Some BIOS will convert this to
65535 or -1, which are functionally equivalent to "none (not used)".

PHYSICAL/LOGICAL equivalent to NATIVE/TRANSLATION
ZBR = Zone Bit Recording = Variable sectors per track

Already low-level formatted at the factory.

Since a User-definable or Custom translation geometry may be used, it
is imperative that the values be written down and kept with your
permanent records for retrieval in the event of CMOS battery failure.

Seagate reserves the right to change, without notice, product
offerings or specifications. (08/09/94)