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                         SEAGATE TECHNOLOGY LLC
                              1-800-SEAGATE
                          http://www.seagate.com
                            (C)opyright 2002


ST-318438LW Ultra160 SCSI Wide (Barracuda 36ES2, LVD)

  ÉÍÍÍÍÍÍÍÍÍÍÍ»
  º REAR VIEW º  (ST-318438LW 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.



  ÉÍÍÍÍÍÍÍÍÍÍÍÍ»
  º FRONT VIEW º  (ST-318438LW)
  ÈÍÍÍÍÍÍÍÍÍÍÍͼ                ÚÄÄ´Reserved. Shipped with cover installed.
                                ³  ÀDo not remove. Do not install jumpers
    TOP (HDA)                  ÕØÍÍ͸     1
   ÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͵::::³::::::ÆÍÍ
    BOTTOM                     ÔÍÍÍ;³³³³³2
                J2  87654321   J6    ³³³³³À ID 1
                    ::::::::         ³³³³ÀÄ ID 2
                    ³³³³³³³³         ³³³ÀÄÄ ID 4
 Force Single Ended Ù³³³³³³³         ³³ÀÄÄÄ ID 8
        Start Delay ÄÙ³³³³³³         ³ÀÄÄÄÄ Reserved (pin-10 ground)
     (12 secs * ID)   ³³³³³³         ÀÄÄÄÄÄ Remote LED (pin-11 +5v)
        Motor Start ÄÄÙ³³³³³
      Write Protect ÄÄÄÙ³³³³
     Parity Disable ÄÄÄÄÙ³³³
           Reserved ÄÄÄÄÄÁÙ³
  ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄ¿              
  ³ Termination Power-source Table ³
  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 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.



                            ST-318438LW



       UNFORMATTED CAPACITY (GB) ________________
       FORMATTED CAPACITY (GB) __________________19.923
       AVERAGE SECTORS PER TRACK ________________748 rounded down
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________52,000
       CYLINDERS ________________________________26,000 user
       HEADS ______PHYSICAL______________________2
       DISCS (3.5 in) ___________________________1
       MEDIA TYPE _______________________________THIN FILM/GMR
       RECORDING METHOD _________________________PRML 16/17 EPR4
       INTERNAL TRANSFER RATE (mbits/sec)________434 to 500
       INTERNAL FORMATTED TRANSFER RATE (MB/sec)_32.3 to 52.2
       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 ___________________________________2048KB
         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 __________________________401Kbytes avg
       SECTORS PER DRIVE ________________________38,914,048
       TPI (TRACKS PER INCH) ____________________58,480
       BPI (PEAK KBITS PER INCH) ________________480
       AVERAGE ACCESS (ms read/write)____________8.5/9.3
         Drive level without controller overhead4
       SINGLE TRACK SEEK (ms read/write) ________0.6/1.0
       MAX FULL SEEK (ms read/write) ____________10.0/10.7
       MTBF (power-on hours) ____________________800,000
       SHOCK (G's, 11/2/.5 ms):
                operating (Read/Write) __________/63/
                abnormal ________________________
                nonoperating (single event) _____/350/
       ACOUSTICS (Bels typical) ________Idle ____2.0
                                         Max ____
       POWER DISSIPATION (watts/BTUs) Active ____/
                                      Idle ______8.0/27.3
       POWER REQUIREMENTS: +12V START-UP (amps) _2.05
                           +12V TYPICAL (amps) __0.31 idle
                           +5V START-UP (amps) __0.82
                           +5V TYPICAL (amps) ___0.78 idle
                           IDLE (watts) _________
       LANDING ZONE (cyl) _______________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

       Physical:
                        Height (inches/mm):      1.0/25.4
                        Width  (inches/mm):     4.00/101.6
                        Depth  (inches/mm):     5.75/146
                        Weight    (lbs/kg):      1.2/0.54

Already low-level formatted at the factory with x spare sectors at
the end of each x cylinder region.  

ZBR = Zone Bit Recording = Variable sectors per track


Seagate reserves the right to change, without notice, product 
offerings or specifications. (08/21/2002)

A copy of this specification file may be obtained by FTP at
ftp://ftp.seagate.com/techsuppt/scsi/ST318438.LW.