                         SEAGATE TECHNOLOGY, INC.
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                            (C)opyright 1991

ST-1401N SCSI-2

  ͻ
   REAR VIEW 
  ͼ

         50 pin I/O Cable Connection
      1
    J4::::::::::::::::::::::::: /\
     PWAͳ 0 0 0 0 
       1 1 1 5GG12
         
        Terminating Resistors


  ͻ
   LEFT SIDE VIEW 
  ͼ

                 12345678
                ͸
FRONT         J6::::::::                                      BACK
 OF   1PWA  OF
DRIVE                                                   DRIVE
     Factory Use ٳ Terminator Power (see below)
     Motor Start ٳ Terminator Power (see below)Ŀ
     Start Delay ٳ Reserved                       
   Write Protect  Parity   Ŀ
                                    Termination Power-source Table 
                                   Ŀ
                                    7 8    7 8   7 8                        
                                     ķ  ķ   ķ  A Drive Supplies Own 
                                          B Drive Supplies Bus 
                                             C Bus Supplies Drive 
                                     A      B     C                         
                                   PWA;

  ͻ
   RIGHT SIDE VIEW 
  ͼ


           1
BACK     J5:::                                                FRONT
 OF   PWA  OF
DRIVE                                                        DRIVE
      ID 4 ٳ ID 1   If these ID jumpers are used,
           ID 2         then ID jumpers shown in front
                        view ARE NOT USED.


  ͻ
   FRONT VIEW 
  ͼ
                          If these ID jumper are used,
       ͸            then ID jumpers shown in right side
     J7:::::            view ARE NOT USED.
     1PWA
        
   ID 1 ٳ Remote LED
   ID 2 ٳ Spindle Synchronization
        ID 4

                              ST - 1401N

       UNFORMATTED CAPACITY (MB) ________________390
       FORMATTED CAPACITY (xx SECTORS) (MB) _____338*
       AVERAGE SECTORS PER TRACK ________________66
       ACTUATOR TYPE ____________________________VOICE COIL
       TRACKS ___________________________________9,900
       CYLINDERS ________________________________1,100 (user)
       HEADS ____________________________________9
       DISCS ____________________________________5
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________ZBR RLL (1,7)
       INTERNAL TRANSFER RATE (mbits/sec) _______20 to 25
       SPINDLE SPEED (RPM) ______________________4,412
       AVERAGE LATENCY (mSEC) ___________________6.8
       BUFFER ___________________________________64 Kbyte
         Read Look-Ahead, Adaptive,
         Multi-Segmented Cache
       INTERFACE ________________________________SCSI-2
       BYTES PER TRACK __________________________39,394 avg.
       SECTORS PER DRIVE ________________________653,400
       TPI (TRACKS PER INCH) ____________________1760
       BPI (BITS PER INCH) ______________________
       AVERAGE ACCESS (ms) ______________________12
       SINGLE TRACK SEEK (ms) ___________________2.5
       MAX FULL SEEK (ms) _______________________24
       MTBF (power-on hours) ____________________150,000
       POWER REQUIREMENTS: +12V START-UP (amps) _2.5
                           +12V TYPICAL (amps) __0.7
                           +5V TYPICAL (amps) ___0.7
                           TYPICAL (watts) ______9.1
                           MAXIMUM (watts) ______15
       BUFFERED STEP PULSE RATE (micro sec) _____
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl)________________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

 * 512 bytes per sector, one spare sector per track,
   two spare cylinders per unit.

Already low-level formatted at the factory.
ZBR = Zone Bit Recording = Variable sectors per track

Seagate reserves the right to change, without notice, product
offerings or specifications. (4/12/91)
