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                         SEAGATE TECHNOLOGY LLC
                              1-800-SEAGATE
                          http://www.seagate.com
                            (C)opyright 2001


ST-1181677LW Ultra160 SCSI Wide (Barracuda 180, LVD)

  ÉÍÍÍÍÍÍÍÍÍÍÍ»
  º REAR VIEW º  (ST-1181677LW only)
  ÈÍÍÍÍÍÍÍÍÍÍͼ
        (TOP)                  J5 Auxiliary
          ___________________  ÚÄÄ  Ä1¿/ÍÍÍÍÍÍÍÍÍ\
        Í( ×××××××××××××××××1)ͳ::::::³³ 0 0 0 0 ÆÍ
          \ÄÄÄÄÄÄÄÄÄÄÄijÄÄÄÄ/  À  ÄÄ 2ÙÀÄ5ÄGÄGÄ12Ù
       68 pin I/O CableÙ        ³³³³³³
       Connection Male          ³³³³³³   SCSI ID = 0 (none)
                                ³³³³³ÀÄÄ SCSI ID = 1
                   pin-11 +5v ÄÄÙ³³³ÀÄÄÄ SCSI ID = 2
                   pin-10 GND ÄÄÄÙ³ÀÄÄÄÄ SCSI ID = 4
                                  ÃÄÄÄÄÄ SCSI ID = 8
      pins 9 & 12 no connection   ÀÄÄÄÄÄÄ or pin-8 Activity LED*

* 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-1181677LC 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 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-1181677LW/LC)
  ÈÍÍÍÍÍÍÍÍÍÍͼ

             FRONT    TOP (HDA)    J2  87654321              Õ͸
              OF ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍPÍWÍAÍÍÍÍÍ͵J1
             DRIVE    BOTTOM           ::::::::              Ô;
                                       ³³³³³³³³
 Force Single-ended (LVD models only) ÄÙ³³³³³³À Term Power (LW only)¿
           Start Delay (12 secs * ID) ÄÄÙ³³³³ÀÄ Reserved            ³
                          Motor Start ÄÄÄÙ³³ÀÄÄ Reserved            ³
                        Write Protect ÄÄÄÄÙÀÄÄÄ Parity Disable      ³
                                                                    ³
                                                                    ³
                    ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿              ³
                    ³ Termination Power-source Table ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
                    ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄ¿
                    ³               ....ÍÍÍÍÍPWA edgeÍÍÍÍÍ ³
                    ³                            2 1       ³
                    ³ A Drive Supplies Bus        ÖÄ·      ³
                    ³                            øºøº      ³
                    ³  (not used on LC model)    øÓø½      ³
                    ³                             A        ³
                    ÀÄÄÄÄÄÄÄÄÄDefault no jumper ÄÄÄÄÄÄÄÄÄÄÄÙ

     Note: LW and LC drives do not have internal terminators or
           any other way of adding internal terminators to the
           drive; use external active termination if required.
           Use active (ANSI SCSI-2 Alternative 2) terminators
           when terminating the bus.  Use active negation
           terminators when terminating a SCSI Ultra2 bus
           operating in Low Voltage Differential (LVD) mode.

  ÉÍÍÍÍÍÍÍÍÍÍÍÍ»
  º FRONT VIEW º  (ST-1181677LW/LC)
  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
                           (pin-10 GND)  ÀÄÄÄ ID 8



                            ST-1181677LW


       UNFORMATTED CAPACITY (GB) ________________241.9
       FORMATTED CAPACITY (GB) __________________181.55
       AVERAGE SECTORS PER TRACK ________________609 rounded down
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________581,928
       CYLINDERS ________________________________24,247 user
       HEADS ______PHYSICAL______________________24
       DISCS (3.3 in) ___________________________12
       MEDIA TYPE _______________________________THIN FILM/MR
       RECORDING METHOD _________________________PRML 8/9 EPR4
       INTERNAL TRANSFER RATE (mbits/sec)________282 to 508
       INTERNAL FORMATTED TRANSFER RATE (MB/sec)_25.3 to 47.0
       EXTERNAL TRANSFER RATE (mbyte/sec) _______40 Sync
            Low Voltage Differential(LVD) _______80/160 Sync
       SPINDLE SPEED (RPM) ______________________7,200
       AVERAGE LATENCY (mSEC) ___________________4.17
       BUFFER (/optional LWV and LCV) ___________4MB/16MB
         Read Look-Ahead, Adaptive,
         Multi-Segmented Cache
       INTERFACE ________________________________Ultra-SCSI Wide
              Low Voltage Differential __________Ultra3-SCSI Wide
              ASA II, SCAM level 2 (1 default)
       BYTES PER TRACK __________________________406,071 avg
       SECTORS PER DRIVE ________________________354,600,001
       TPI (TRACKS PER INCH) ____________________31,200
       BPI (KBITS PER INCH) _____________________490
       AVERAGE ACCESS (ms read/write)____________7.4/8.2
         Drive level with controller overhead
       SINGLE TRACK SEEK (ms read/write) ________0.8/1.1
       MAX FULL SEEK (ms read/write) ____________16/17
       MTBF (power-on hours) ____________________1,200,000
       SHOCK (G's, 11/2/.5 ms):
                operating (Read/Write) __________10
                abnormal ________________________40
                nonoperating ____________________75/150/80
       ACOUSTICS (Bels typical, sound power) ____3.7
       POWER DISSIPATION (watts/BTUs) Active ____/
                                      Idle ______10.3/35.18
       POWER REQUIREMENTS: +12V START-UP (amps) _1.34
                           +12V TYPICAL (amps) __0.53 idle
                           +5V START-UP (amps) __0.87
                           +5V TYPICAL (amps) ___0.76 idle
                           IDLE (watts) _________
       LANDING ZONE (cyl) _______________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

       Physical:
                        Height (inches/mm):      1.6/40.64
                        Width  (inches/mm):     4.00/101.6
                        Depth  (inches/mm):     5.75/146.1
                        Weight    (lbs/kg):      2.3/1.043

Already low-level formatted at the factory with x spare sectors
per cylinder and x spare cylinder per unit.

ZBR = Zone Bit Recording = Variable sectors per track

Seagate reserves the right to change, without notice, product 
offerings or specifications. (04/09/2001)

A copy of this specification file may be obtained by FTP at
ftp://ftp.seagate.com/techsuppt/scsi/ST118167.7LW.