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



ST-19171W Ultra SCSI Wide (Barracuda 9)

  ÉÍÍÍÍÍÍÍÍÍÍÍ»
  º REAR VIEW º  (ST-19171W only)
  ÈÍÍÍÍÍÍÍÍÍÍͼ
        (TOP)                  J1A Auxiliary
          ___________________  ÚÄÄ  Ä1¿/ÍÍÍÍÍÍÍÍÍ\
        Í( ×××××××××××××××××1)ͳ::::::³³ 0 0 0 0 ÆÍ
          \ÄÄÄÄÄÄÄÄÄÄÄijÄÄÄÄ/  À  ÄÄ  ÙÀÄ5ÄGÄGÄ12Ù
       68 pin I/O CableÙ        ³³³³³³
       Connection Male          ³³³³³³
                                ³³³³³³   SCSI ID = 0 (none)
           pin-11 +5v  ÄÄÄÄÄÄÄÄÄÙ³³³³ÃÄÄ SCSI ID = 1
           pin-10 GND* ÄÄÄÄÄÄÄÄÄÄÙ³³³ÀÄÄÄ or pin-2 Fault LED*
           SCSI ID = 8 ÄÄÄÄÄÄÄÄÄÄÄ´³ÃÄÄÄ SCSI ID = 2
            or pin-8 Activity ÄÄÄÄÙ³ÀÄÄÄÄ or pin-4 Vendor Unique*
            LED*                   ÃÄÄÄÄ SCSI ID = 4
        pins 9 & 12 no connection  ÀÄÄÄÄÄ or pin-6 Spindle Synch*

* These pins are driven low for 250ms after PWR ON and RESET
  to allow jumper selectable SCSI ID as shown above.


  ÉÍÍÍÍÍÍÍÍÍÍÍ»
  º REAR VIEW º  (ST-19171WC only)
  ÈÍÍÍÍÍÍÍÍÍÍͼ
                     80 pin I/O and DC Power Wall/bracket Connection
                     ³  Female
    J1          /ÄÄÄijÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ\      TOP (HDA)
     ÍÍÍÍÍÍÍÍÍÍ/ ×××××××××××××××××××× \ÍÍÍÍÍÍÍÍÍÍ
              (\Ä1ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ40/)    BOTTOM

     Notes on 80 pin I/O connector:
       pins  1 -  4 = +12v        41 - 44 = 12v GND
            34 - 36 = +5v         74 - 76 = 5v GND
                 37 = SYNC             77 = LEDC
                 38 = MTRON            78 = DLYDST
                 39 = SCSIA0           79 = SCSIA1
                 40 = SCSIA2           80 = SCSIA3

  Mating NC connector: AMP US p/n: 2-557103-1 straight-in, Male 80-pin
                                   2-557101-1 right angle to PCB


  ÉÍÍÍÍÍÍÍÍÍÍÍ»
  º SIDE VIEW º  (ST-19171W/WC)
  ÈÍÍÍÍÍÍÍÍÍÍͼ

    FRONT    TOP (HDA)    J2  87654321              Õ͸
     OF ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍPÍWÍAÍÍÍÍÍ͵J1 Cable
    DRIVE    BOTTOM           ::::::::              Ô;
                              ³³³³³³³³
  Enable T-Res (W model only) Ù³³³³³³À Terminator Power³
   Start Delay (12 secs * ID) ÄÙ³³³³ÀÄ Terminator Powerÿ
                  Motor Start ÄÄÙ³³ÀÄÄ Reserved         ³
                Write Protect ÄÄÄÙÀÄÄÄ Parity Disable   ³
                                                        ³
    ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿                  ³
    ³ Termination Power-source Table ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
    ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
    ³          ÍÍÍÍÍ....ÍÍÍÍÍ....ÍÍÍÍÍPWA edgeÍÍÍÍͳ
    ³                       2 1       2 1     2 1  ³
    ³ A Drive Supplies Bus   ÖÄ·     ÖÄ·           ³
    ³ B Drive Supplies Own  øºøº     ºøºø    ÖøÄø· ³
    ³ C Bus Supplies Drive  øÓø½     Óø½ø    ÓøÄø½ ³
    ³ A+B is valid           A         B       C   ³
    ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄDefaultÄÄÄÄÄÄÄÄÄÙ
    (not used on WC model)
    Note: WD drives do not have internal terminators or any other
          way of adding internal terminators to the drive; use
          external active termination if required.


  ÉÍÍÍÍÍÍÍÍÍÍÍÍ»
  º FRONT VIEW º  (ST-19171W/WC)
  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
                            Remote LED Ù³³³³À ID 1
                           (pin-11 +5v) ³³³ÀÄ ID 2
                              Reserved ÄÙ³ÀÄÄ ID 4
                                         ÀÄÄÄ ID 8


                            ST-19171W


       UNFORMATTED CAPACITY (MB) ________________11700
       FORMATTED CAPACITY (MB) __________________9100
       AVERAGE SECTORS PER TRACK ________________168 rounded down
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________105,480
       CYLINDERS ________________________________5,274 user
       HEADS ______PHYSICAL______________________20
       DISCS (3.5 in) ___________________________11
       MEDIA TYPE _______________________________THIN FILM/MR
       RECORDING METHOD _________________________PRML (0,4,4)
       INTERNAL TRANSFER RATE (mbits/sec)________80 to 124
       EXTERNAL TRANSFER RATE (mbyte/sec) _______40 Sync
       SPINDLE SPEED (RPM) ______________________7,200
       AVERAGE LATENCY (mSEC) ___________________4.17
       BUFFER (/optional)________________________512/2048 KByte
         Read Look-Ahead, Adaptive,
         Multi-Segmented Cache
       INTERFACE ________________________________Ultra-SCSI Wide
                 ASA II, SCAM level 2
       BYTES PER TRACK (avg unformatted) ________102.000
       SECTORS PER DRIVE ________________________17,773,440
       TPI (TRACKS PER INCH) ____________________5555
       BPI (KBITS PER INCH) _____________________91.5 to 124.5
       AVERAGE ACCESS (ms) (read/write)__________9.7/10.7
         Drive level with controller overhead
       SINGLE TRACK SEEK (ms) ___________________0.8/1.4
       MAX FULL SEEK (ms) _______________________19.2/20.2
       MTBF (power-on hours) ____________________1,000,000
       SHOCK (G's, 11/2 ms):
                operating (Read/Write) __________2
                abnormal ________________________10
                nonoperating ____________________50/100
       ACOUSTICS (Bels typical, sound power) ____4.6
       POWER DISSIPATION (watts/BTUs) Active ____14.7/50
                                      Idle ______13/44
       POWER REQUIREMENTS: +12V START-UP (amps) _2.18
                           +12V TYPICAL (amps) __0.73 idle
                           +5V START-UP (amps) __0.92
                           +5V TYPICAL (amps) ___0.84 idle
                           IDLE (watts) _________12.4
       LANDING ZONE (cyl) _______________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

       Physical:
                        Height (inches/mm):     1.62/41.1
                        Width  (inches/mm):     4.00/101.6
                        Depth  (inches/mm):     5.75/146.1
                        Weight    (lbs/kg):     2.3/1.04

Already low-level formatted at the factory with 16 spare sectors
per cylinder and 1 spare cylinder per unit.
ZBR = Zone Bit Recording = Variable sectors per track


Seagate reserves the right to change, without notice, product 
offerings or specifications. (01/11/98)