                         SEAGATE TECHNOLOGY, INC.
                              1-800-SEAGATE
                          http://www.seagate.com
                            (C)opyright 1996



ST-34501W/WC Ultra-SCSI Wide (Cheetah 4LP)

  ͻ
   REAR VIEW   (ST-34501W only)
  ͼ
        (TOP)                   J5 Auxiliary
          ___________________    1/\
        ( 1)ͳ:::::: 0 0 0 0 
          \ĳ/      5GG12
       68 pin I/O Cable        
       Connection Male          
                                   SCSI ID = 0 (none)
        Auxiliary option header  SCSI ID = 1
                                 or pin-2 Fault LED*
           pin-11 +5v  ٳ SCSI ID = 2
           pin-10 GND  ٳ or Vendor Unique*
           SCSI ID = 8 Ĵ SCSI ID = 4
            or pin-8 Activity  or pin-6 Reserved*
            LED*

    * These pins are driven low for 250ms after PWR ON or RESET
      to allow jumper selectable SCSI ID.  Pins 9 and 12 have
      no connection.


  ͻ
   REAR VIEW   (ST-34501WC only)
  ͼ
                     80 pin I/O and DC Power Wall/bracket Connection
                       Female
    J1          /ĳ\      TOP (HDA)
     /  \
              (\140/)    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


  ͻ
   SIDE VIEW   (ST-34501W/WC)
  ͼ

    FRONT    TOP (HDA)    J2  87654321              ͸
     OF PWA͵J1
    DRIVE    BOTTOM           ::::::::              ;
                              
  Enable T-Res (W model only) ٳ Terminator Power
   Start Delay (12 secs * ID) ٳ Terminator Powerÿ
                  Motor Start ٳ Reserved         
                Write Protect  Parity Disable   
                                                        
    Ŀ                  
     Termination Power-source Table 
    Ŀ
              ........PWA edgeͳ
                           2 1       2 1     2 1  
     A Drive Supplies Bus   ķ     ķ           
     B Drive Supplies Own            
     C Bus Supplies Drive            
     A+B is valid           A         B       C   
    Default
    (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.


  ͻ
   FRONT VIEW   (ST-34501W/WC)
  ͼ
                                  ĴReserved. Shipped with cover installed.
                                    Do not remove. Do not install jumpers
                      TOP (HDA)  ͸     1
     PWA͵::::::::::
                 *    BOTTOM     ;123456
                                J6    
            LED                      
                            Remote LED ٳ ID 1
                           (pin-11 +5v)  ID 2
                              Reserved ٳ ID 4
                                          ID 8

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


                            ST-34501W


       UNFORMATTED CAPACITY (GB) ________________5.591
       FORMATTED CAPACITY (GB) __________________4.55
       AVERAGE SECTORS PER TRACK ________________170 rounded down
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________52,208
       CYLINDERS ________________________________6,526 user
       HEADS ______PHYSICAL______________________8
       DISCS (3.5 in) ___________________________4
       MEDIA TYPE _______________________________THIN FILM/MR
       RECORDING METHOD _________________________ZBR PRML (0,4,4)
       INTERNAL TRANSFER RATE (mbits/sec)________122 to 177
       INTERNAL FORMATTED TRANSFER RATE (MB/sec)_11.3 to 16.8
       EXTERNAL TRANSFER RATE (mbyte/sec) _______40 Sync
       SPINDLE SPEED (RPM) ______________________10,033
       AVERAGE LATENCY (mSEC) ___________________2.99
       BUFFER (/optional) _______________________512/2048 KByte
         Read Look-Ahead, Adaptive,
         Multi-Segmented Cache
       INTERFACE ________________________________Ultra SCSI
         ASA II, S.M.A.R.T., SCAM level 1 (2 optional)
       BYTES PER TRACK __________________________115,078 average
       SECTORS PER DRIVE ________________________8,887,199
       TPI (TRACKS PER INCH) ____________________6932
       BPI (PEAK KBITS PER INCH) ________________135.4
       AVERAGE ACCESS (ms read/write)____________7.7/8.7
         Drive level with controller overhead
       SINGLE TRACK SEEK (ms read/write) ________0.98/1.24
       MAX FULL SEEK (ms) _______________________18.2/19.2
       MTBF (power-on hours) ____________________1,000,000
       SHOCK (G's):
                operating (Read/Write) __________2
                abnormal ________________________10
                nonoperating 11/2 msec __________50/140
       ACOUSTICS (Bels typical, sound power) ____4.6
       POWER DISSIPATION (watts/BTUs) Active ____14.9/51
                                      Idle ______12/41
       POWER REQUIREMENTS: +12V START-UP (amps) _2.2
                           +12V TYPICAL (amps) __0.73 idle
                           +5V START-UP (amps) __0.88
                           +5V TYPICAL (amps) ___0.64 idle
                           IDLE (watts) _________13.5
       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 108 spare sectors at
the end of each 12 cylinder region.  

ZBR = Zone Bit Recording = Variable sectors per track


Seagate reserves the right to change, without notice, product 
offerings or specifications. (08/07/97)

