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                            (C)opyright 1993



ST-11900N SCSI-2 Fast (Hawk 2)

  ͻ
   REAR VIEW   (ST-11900N only)
  ͼ

         50 pin I/O Cable Connection
         
    J11 /\    TOP (HDA)
     ͵:::::::::::::::::::::::::ͳ 0 0 0 0 
      ; 5GG12    BOTTOM



  ͻ
   REAR VIEW   (ST-11900NC only)
  ͼ
                     80 pin I/O and DC Power Connection
                     
    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

  ͻ
   RIGHT SIDE VIEW   (Both ST-11900N and ST-11900NC)
  ͼ


BACK   ͸       J2  12345678                    TOP (HDA)  FRONT
 OF    J1PWA OF
DRIVE  ;           ::::::::                    BOTTOM     DRIVE
                     
   Terminator Power ٳ Reserved
  ڴTerminator Power ٳ Start Delay (12 secs * ID)
       Enable T-Res ٳ Motor Start
      Parity Enable  Write Protect
  
  
   Ŀ
  Ĵ Termination Power-source Table 
    Ŀ
    ........PWA edge          
                                                  
      1 2     1 2      1 2                        
     ķ       ķ    ķ  A Drive Supplies Bus 
                B Drive Supplies Own 
                   C Bus Supplies Drive 
       A       B        C                         
    Default


  ͻ
   LEFT SIDE VIEW   (ST-11900N only)
  ͼ             If these ID jumpers are used,
                                 then ID jumpers shown in front
                                 view ARE NOT USED.

  FRONT                TOP (HDA)                 J5 1 ͸BACK
   OF   PWA͵:::͵J1 OF
  DRIVE                BOTTOM                       ; ;DRIVE
                                                     
                                               ID 1 ٳ ID 4
                                                    ID 2


  ͻ
   FRONT VIEW   (Both ST-11900N and ST-11900NC)
  ͼ


                      TOP (HDA)   J6  1
     PWA͵::::::
                 *    BOTTOM          ;
                                      123456
            LED                      
                                  ID 4 ٳ Reserved
                                  ID 2 ٳ Remote LED (pin-3 +5v)
                                  ID 1  Spindle Synchronization
                                               (pin-6 REF SIG+, default
      If these ID jumper are used, then          jumper installed)
         ID jumpers shown in left side view J5
         or 80 pin I/O cable ARE NOT USED.


                            ST-11900N
                            Hawk 2

       UNFORMATTED CAPACITY (MB) ________________2003
       FORMATTED CAPACITY (xx SECTORS) (MB) _____1700
       AVERAGE SECTORS PER TRACK ________________83 rounded down
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________39,315
       CYLINDERS ________________________________2,621 user
       HEADS ______PHYSICAL______________________15
       DISCS (3.5 in) ___________________________8
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________ZBR RLL (1,7)
       INTERNAL TRANSFER RATE (mbits/sec)________26.8 to 45.6
       EXTERNAL TRANSFER RATE (mbyte/sec) _______4 Async
       EXTERNAL TRANSFER RATE (mbyte/sec) _______10 Sync
       SPINDLE SPEED (RPM) ______________________5,411
       AVERAGE LATENCY (mSEC) ___________________5.54
       BUFFER ___________________________________256/1024 KByte
         Read Look-Ahead, Adaptive,
         Multi-Segmented Cache
       INTERFACE ________________________________SCSI-2 FAST
                                                 ASA
       SECTORS PER DRIVE ________________________
       TPI (TRACKS PER INCH) ____________________3000
       AVERAGE ACCESS (ms) (read/write)__________9.0/10.5
         Drive level without controller overhead
       SINGLE TRACK SEEK (ms) ___________________1
       MAX FULL SEEK (ms) _______________________19
       MTBF (power-on hours) ____________________500,000
       POWER REQUIREMENTS: +12V START-UP (amps) _2.0
                           +12V TYPICAL (amps) __0.54
                           +5V START-UP (amps) __0.8
                           +5V TYPICAL (amps) ___0.43
                           TYPICAL (watts) ______9
                           MAXIMUM (watts) ______
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl) _______________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

       Physical:
                        Height (inches/mm):     1.63/41.4
                        Width  (inches/mm):     4.00/101.6
                        Depth  (inches/mm):     5.75/146.1
                        Weight    (lbs/kg):     2.5/0.99

Already low-level formatted at the factory with six spare sectors
per cylinder and two spare cylinders/unit.

ZBR = Zone Bit Recording = Variable sectors per track

Seagate reserves the right to change, without notice, product
offerings or specifications. (08/09/94)
