                         SEAGATE TECHNOLOGY, INC.
       Customer Technical Support FAX Network +1 408 438-8137
     Customer Technical Support Bulletin Boards (300-9600, 8-N-1)
Ŀ
 United States    +1 408 438-8771   United Kingdom +44 628 478011  
Ĵ
 Germany         +49  89 140-9331   Singapore      +65   227-2217  

                            (C)opyright 1991



ST-41651N  Wren 8 FH SCSI-2 Fast

20-pin (2x10) configuration jumper-block version

                         Synchronous Spindles option         DC
                                                             Power
                           ͸ /\
      PWA͵:SCSI:Cable:::::::::::::::::1͵ 0 0 0 0 
      Ŀ             Ŀ ; 5GG12
      oo o o o o o oo o   1 1 1
      oo o o o o o oo o     
        4 2 1           Terminator SIPS
            
                 Motor Start Delay (16 secs * ID)
                Parity check enable
               Motor Start option enable
            Drive ID's, ID 0 (none) if only SCSI device
         Terminator power to the Bus (vertical)
        Terminator power from Drive, default (vertical)
                       Terminator power from Bus (lower horizontal)


16-pin (2x8) configuration jumper-block version

         Synchronous Spindles option                         DC
                                                             Power
                           ͸ /\
      PWA͵:SCSI:Cable:::::::::::::::::1͵ 0 0 0 0 
      Ŀ                 ; 5GG12
      o oo o o o o o        1 1 1  Ŀ
      o oo o o o o o            oo
      14 2 1 M P            Terminator SIPS           ooĿ
                                                  ٳ 
                   Motor Start Delay (16 secs * ID)     
                  Parity check enable                  
                 Motor Start option enable            
              Drive ID's, ID 0 (none) if           
                         only SCSI device                    
                                                             
         Terminator power from Drive, default (vertical)   
                  Terminator power to the Bus (vertical)  
            Terminator power from Bus (lower horizontal) 

Both versions:

           LED
          Ŀ      (Viewed from front of drive)           GND
           0                                             
      PWA
                                                         o o o  J6
                                         pin-1 (+5v) ----o o o
                                                           
                                 Remote LED connection   
                                  Write Protect Remote  
                               Switch cable connection      
                                      Factory Use Only 


                             ST-41651N
                             WREN 8 FH

       UNFORMATTED CAPACITY (MB) ________________1,650
       FORMATTED CAPACITY (xx SECTORS) (MB) _____1,415*
       AVERAGE SECTORS PER TRACK (with spares)___87
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________31,605
       CYLINDERS ________________________________2,107 (user)
       HEADS ____________________________________15
       DISCS (5.25 in) __________________________8
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________ZBR RLL (1,7)
       INTERNAL TRANSFER RATE (mbits/sec) _______17 to 32
       EXTERNAL TRANSFER RATE (Mbytes/sec) ______10.0 Sync.
       SPINDLE SPEED (RPM) ______________________3,600
       AVERAGE LATENCY (mSEC) ___________________8.33
       BUFFER ___________________________________256 Kbyte
         Read Look-Ahead, Adaptive, Multi-
         Segmented Cache
       INTERFACE ________________________________SCSI-2 Fast
       BYTES PER TRACK __________________________54,900 avg.
       SECTORS PER DRIVE ________________________2,749,635
       TPI (TRACKS PER INCH) ____________________1,760
       BPI (BITS PER INCH) ______________________
       AVERAGE ACCESS (ms) ______________________15
       SINGLE TRACK SEEK (ms) ___________________2.5
       MAX FULL SEEK (ms) _______________________34
       MTBF (power-on hours) ____________________150,000
       POWER REQUIREMENTS: +12V START-UP (amps) _4.5
                           +12V TYPICAL (amps) __1.5
                           +5V START-UP (amps) __0.8
                           +5V TYPICAL (amps) ___0.6
                           TYPICAL (watts) ______21
                           MAXIMUM (watts) ______58
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl) _______________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

* Already low-level formatted at the factory with one spare sector per
track and two spare cylinders/unit.


Seagate reserves the right to change, without notice, product
offerings or specifications. (10/31/91)

