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                         SEAGATE TECHNOLOGY, INC.
                              1-800-SEAGATE
                          http://www.seagate.com
                            (C)opyright 1997


ST-32272N Ultra-SCSI (Barracuda 4XL)

  ÉÍÍÍÍÍÍÍÍÍÍÍ»
  º REAR VIEW º  (ST-32272N)
  ÈÍÍÍÍÍÍÍÍÍÍͼ

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

     Caution:  Do not use J2 jumpers on J6.  The internal contacts
               will be bent and cannot be reused on J2 without them
               falling off.

  ÉÍÍÍÍÍÍÍÍÍÍÍ»
  º SIDE VIEW º  (ST-32272N)
  ÈÍÍÍÍÍÍÍÍÍÍͼ

    FRONT    TOP (HDA)    J2  87654321              Õ͸
     OF ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍPÍWÍAÍÍÍÍÍ͵J1
    DRIVE    BOTTOM           ::::::::              Ô;
                              ³³³³³³³³
  Enable T-Res (N 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
    Note: ND 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-32272N)
  ÈÍÍÍÍÍÍÍÍÍÍÍͼ
                                  ÚÄÄ´Reserved. Shipped with cover installed.
                                  ³  ÀDo not remove. Do not install jumpers
                      TOP (HDA)  ÕØÍÍ͸     1
     ÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͵::::³::::::ÆÍÍ
                 *    BOTTOM     ÔÍÍÍ;³³³³³³  External switches can use
                 ³               J6    ³³³³³³  pins 1,3 and 5 to set ID
            LED ÄÙ                     ³³³³³³  
                          Activity LED Ù³³³³À ID 1
                           (pin-11 +5v) ³³³ÀÄ ID 2
                              Reserved ÄÙ³ÀÄÄ ID 4
                              Reserved ÄÄÙ
                         pin-10 ground



                            ST-32272N


       UNFORMATTED CAPACITY (GB) ________________3.25
       FORMATTED CAPACITY (GB) __________________2.26
       AVERAGE SECTORS PER TRACK ________________175 rounded down
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________25,244
       CYLINDERS ________________________________6,311 user
       HEADS ______PHYSICAL______________________4
       DISCS (3.5 in) ___________________________2
       MEDIA TYPE _______________________________THIN FILM/MR
       RECORDING METHOD _________________________ZBR PRML (0,4,4)
       INTERNAL TRANSFER RATE (mbits/sec)________92 to 140
       INTERNAL FORMATTED TRANSFER RATE (MB/sec)_
       EXTERNAL TRANSFER RATE (mbyte/sec) _______20 Sync
       SPINDLE SPEED (RPM) ______________________7,200
       AVERAGE LATENCY (mSEC) ___________________4.17
       BUFFER (/optional) _______________________512 KByte
         Read Look-Ahead, Adaptive,
         Multi-Segmented Cache
       INTERFACE ________________________________Ultra-SCSI
         ASA II, S.M.A.R.T., SCAM level 2 
       BYTES PER TRACK __________________________115,078 average
       SECTORS PER DRIVE ________________________4,419,465
       TPI (TRACKS PER INCH) ____________________6800
       BPI (PEAK KBITS PER INCH) ________________139.2
       AVERAGE ACCESS (ms read/write)____________9.4/10.4
         Drive level with controller overhead
       SINGLE TRACK SEEK (ms read/write) ________1.7/1.8
       MAX FULL SEEK (ms) _______________________16.7/17.7
       MTBF (power-on hours) ____________________1,000,000
       SHOCK (G's):
                operating (Read/Write) __________2
                abnormal ________________________10
                nonoperating 11/2 msec __________75/100
       ACOUSTICS (Bels typical, sound power) ____4.2
       POWER DISSIPATION (watts/BTUs) Active ____12.9/44
                                      Idle ______8.8/30
       POWER REQUIREMENTS: +12V START-UP (amps) _2.44
                           +12V TYPICAL (amps) __0.54 idle
                           +5V START-UP (amps) __0.78
                           +5V TYPICAL (amps) ___0.46 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):     5.47/146
                        Weight    (lbs/kg):      1.5/0.68

Already low-level formatted at the factory with 59 spare sectors at
the end of each 6 cylinder region.  

ZBR = Zone Bit Recording = Variable sectors per track



Seagate reserves the right to change, without notice, product 
offerings or specifications. (04/01/97)

A copy of this specification file may be obtained by FTP at
ftp://ftp.seagate.com/techsuppt/scsi/st32272n.txt.