SEAGATE TECHNOLOGY, INC.
       Customer Technical Support FAX Network +1 408 438-8137
     Customer Technical Support Bulletin Boards (300-9600, 8-N-1)
/----------------------------------+---------------------------------\
| United States    +1 408 438-8771 |  United Kingdom +44 628 478011  |
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| Germany         +49  89 140-9331 |  Singapore      +65   227-2217  |
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                            (C)opyright 1993


ST-5660N Fast SCSI-2 (Decathlon 545 SCSI)

  +===========+
  # REAR VIEW #
  +===========+

      (front) ID1  o o   50 pin I/O Cable Connection
              ID2  o o   |
       (back) ID4  o o#===========  ============# /---------\    TOP (HDA)
                  ====#::::::::::::::::::::::::1#=| 0 0 0 0 |==
                    J1\=========================/ \-5-G-G-12/    BOTTOM


ST-5660N

 +==============+
 #  Front View  #
 +==============+

                   /------------------ SCSI ID's (none for ID0)
                   |   /-------------- Reserved
  (TOP)            |   | /------------ Remote LED
                 /-+-\ | | /---------- Reserved
                 4 2 1 | | |         /22         /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)                   | | | |  |      \-----  Reserved
            pin-14 removed --/ | | |  \------------  Terminator power
                               | | |                  see detail below  ----\
                               | | \---------------  Terminator disable     |
                               | \-----------------  Parity Enable          |
                               \-------------------  Remote Start           |
                                                                            |
            Terminator Power (4 settings) ----------------------------------/

            22    24    1.  23 & 24  Power from drive power connector
              o  o      2.  21 & 23  Power from SCSI bus
                        3.  21 & 23  and
              o  o          22 & 24  Power from drive power connector and
            21    23                  to SCSI bus
                        4.  22 & 24  Power to SCSI bus only


                             ST-5660N
                             Decathlon 545 SCSI 

       UNFORMATTED CAPACITY _____________________
       FORMATTED CAPACITY (xx SECTORS) __________545.29
       SECTORS PER TRACK ________________________88 rounded down
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       CYLINDERS __PHYSICAL______________________3002
       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) _______27.6 to 47.2
       EXTERNAL TRANSFER RATE (Mbytes/sec) ______5 Async/10 Sync
       SPINDLE SPEED (RPM) ______________________4,500
       AVERAGE LATENCY (mSEC) ___________________6.67
       BUFFER ___________________________________256 Kbyte SeaCache
        Read/Write, Read Look-Ahead,
        Multi-Segmented
       INTERFACE ________________________________SCSI-2 Fast
       SECTORS PER DRIVE ________________________1,065,036
       TPI (TRACKS PER INCH) ____________________3,309
       BPI (BITS PER INCH) ______________________52,602
       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 ________________________0

       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


ZBR = Zone Bit Recording = Variable sectors per track

Already low-level formatted at the factory.

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