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                         SEAGATE TECHNOLOGY, INC.
                              1-800-SEAGATE
                          http://www.seagate.com
                            (C)opyright 1995



ST-31231N SCSI-2 Fast (Hawk 2LP)

  ÉÍÍÍÍÍÍÍÍÍÍÍ»
  º REAR VIEW º  (ST-31231N only)
  ÈÍÍÍÍÍÍÍÍÍÍͼ

         50 pin I/O Cable Connection
         ³
    J1ÕÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ1¸ /ÄÄÄÄÄÄÄÄÄ\    TOP (HDA)
     ͵:::::::::::::::::::::::::Æͳ 0 0 0 0 ³ÍÍ
      ÔÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ; ÀÄ5ÄGÄGÄ12Ù    BOTTOM



  ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
  º RIGHT SIDE VIEW º  (ST-31231N)
  ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ


BACK   Õ͸       J2  12345678                    TOP (HDA)  FRONT
 OF    J1ÆÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ OF
DRIVE  Ô;           ::::::::                    BOTTOM     DRIVE
                     ³³³³³³³³
   ³Terminator Power Ù³³³³³³À Enable T-Res
  Ú´Terminator Power ÄÙ³³³³ÀÄ Start Delay (12 secs * ID)
  ³         Reserved ÄÄÙ³³ÀÄÄ Motor Start
  ³    Parity Enable ÄÄÄÙÀÄÄÄ Write Protect
  ³
  ³
  ³ ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
  ÀÄ´ Termination Power-source Table ³
    ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
    ³ÍÍÍÍÍ....ÍÍÍÍÍ....ÍÍÍÍÍPWA edgeÍÍÍÍÍ          ³
    ³                                              ³
    ³  1 2     1 2      1 2                        ³
    ³ ÖÄ·       ÖÄ·    ÖÄÄÄ·  A Drive Supplies Bus ³
    ³ ºøºø     øºøº    ÓøÄø½  B Drive Supplies Own ³
    ³ Óø½ø     øÓø½     ø ø   C Bus Supplies Drive ³
    ³   A       B        C                         ³
    ÀÄÄÄÄÄÄÄÄÄDefaultÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ


  ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
  º LEFT SIDE VIEW º  (ST-31231N)
  ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ             If these ID jumpers are used,
                                 then ID jumpers shown in front
                                 view ARE NOT USED.

  FRONT                TOP (HDA)                 J5 ÕÍÍ1¸ Õ͸BACK
   OF   ÍÍÍÍÍÍÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͵:::Æ͵J1 OF
  DRIVE                BOTTOM                       ÔÍÍ; Ô;DRIVE
                                                     ³³³
                                               ID 1 ÄÙ³ÀÄ ID 4
                                                    ID 2


  ÉÍÍÍÍÍÍÍÍÍÍÍÍ»
  º FRONT VIEW º  (ST-31231N)
  ÈÍÍÍÍÍÍÍÍÍÍÍͼ
                                  ÚÄÄ´Reserved. Shipped with cover installed.
                                  ³  ÀDo not remove. Do not install jumpers
                      TOP (HDA)  ÕØÍÍ͸     1
     ÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͵::::³::::::ÆÍÍ
                 *    BOTTOM     ÔÍÍÍ;123456
                 ³               J6    ³³³³³³
            LED ÄÙ                     ³³³³³³
                                  ID 4 Ù³³³³À Reserved
                                  ID 2 ÄÙ³³ÀÄ Remote LED (pin-3 +5v)
                                  ID 1 ÄÄÙÀÄÄ Reserved

    If these ID jumper are used, then ID jumpers shown in left side view J5
      ARE NOT USED.


                            ST-31231N
                            Hawk 2LP

       UNFORMATTED CAPACITY (MB) ________________1280
       FORMATTED CAPACITY (xx SECTORS) (MB) _____1060
       AVERAGE SECTORS PER TRACK ________________103
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________19,960
       CYLINDERS ________________________________3992
       HEADS ______PHYSICAL______________________5
       DISCS (3.5 in) ___________________________3
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________ZBR RLL (1,7)
       INTERNAL TRANSFER RATE (mbits/sec)________33.9 to 56.7
       EXTERNAL TRANSFER RATE (mbyte/sec) _______5.2 Async
       EXTERNAL TRANSFER RATE (mbyte/sec) _______10 Sync
       SPINDLE SPEED (RPM) ______________________5411
       AVERAGE LATENCY (mSEC) ___________________5.54
       BUFFER ___________________________________256 KByte
         Read Look-Ahead, Adaptive,
         Multi-Segmented Cache
       INTERFACE ________________________________SCSI-2 FAST
                                                 ASA II
       TPI (TRACKS PER INCH) ____________________4200
       AVERAGE ACCESS (ms) (read/write)__________10.4/11.4
         Including controller overhead
       SINGLE TRACK SEEK (ms) (read/write)_______2.1/2.5
       MAX FULL SEEK (ms) (read/write)___________20.4/21.4
       MTBF (power-on hours) ____________________800,000
       SHOCK (G's):
                operating (Read/Write) __________10
                nonoperating ____________________75
       ACOUSTICS (typ/max dBA) __________________
       POWER REQUIREMENTS: +12V START-UP (amps) _2.0
                           +12V TYPICAL (amps) __0.35
                           +5V START-UP (amps) __0.61
                           +5V TYPICAL (amps) ___0.35
                           TYPICAL (watts) ______6
                           MAXIMUM (watts) ______9
       LANDING ZONE (cyl) _______________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

       Physical:
                        Height (inches/mm):     1.00/25.4
                        Width  (inches/mm):     4.02/101.6
                        Depth  (inches/mm):     5.74/145.8
                        Weight    (lbs/kg):     1.5/0.68

Already low-level formatted at the factory with 1 spare sector
per head (all spare sectors are on one track) and 2 spare
cylinders per unit.

ZBR = Zone Bit Recording = Variable sectors per track

Seagate reserves the right to change, without notice, product 
offerings or specifications. (01/03/96)

A copy of this specification file may be obtained by FTP at
ftp://ftp.seagate.com/techsuppt/scsi/st31231n.txt.