                         SEAGATE TECHNOLOGY, INC.
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                            (C)opyright 1993



ST-9235NG
                                       40-pin I/O Connector (* see below)
                            TOP       
                                                                  1
                                                             o o o o
                              PWA :::::::::::.:::::::1    
                                                 
       pin-17 removed for keying 

Pin assignments for the Seagate 2.5" drive SCSI interface connector

     (signal)          (pin)          (signal)
                    Ŀ                               pin
     Reserved (NC)   1      2   Reserved (ND)                ID1 ID2 ID4
     Reserved (NC)   3      4   Reserved (ND)            ID 
              ID1-   5      6   ID2-                      0  H   H   H
              ID4-   7      8   LED                       1  L   H   H
                                                2  H   L   H
                    Ŀ                            3  L   L   H
               +5v   1      2   +5v                       4  H   H   L
           +5v Ret   3      4   +5v Ret                   5  L   H   L
            Ground   5      6   DB0-                      6  H   L   L
            Ground   7      8   DB1-                      7  L   L   L
            Ground   9      10  DB2-
            Ground   11     12  DB3-                      H = high
            Ground   13     14  DB4-                      L = low
            Ground   15     16  DB5-
     Connector Key   nopin  18  DB6-
            Ground   19     20  DB7-
            Ground   21     22  Parity-
            Ground   23     24  TRMPWR
              ATN-   25     26  BSY-
            Ground   27     28  ACK-
              RST-   29     30  MSG-
            Ground   31     32  SEL-
              I/O-   33     34  C/D-
            Ground   35     36  REQ-
           +5v Ret   37     38  +5v Ret
               +5v   39     40  +5v
                    


                             ST-9235N


       UNFORMATTED CAPACITY _____________________
       FORMATTED CAPACITY (xx SECTORS) __________209.8
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________
       LOGICAL CYLINDERS ________________________985
       LOGICAL HEADS ____________________________13
       LOGICAL SECTORS PER TRACK ________________32
       HEADS ____________________________________6
       DISCS (2.5 in) ___________________________3
       MEDIA TYPE _______________________________THIN FILM
       HEAD TYPE ________________________________THIN FILM
       RECORDING METHOD _________________________ZBR RLL (2,7)
       INTERNAL TRANSFER RATE (mbits/sec) _______up to 16
       SPINDLE SPEED (RPM) ______________________3,449
       AVERAGE LATENCY (mSEC) ___________________8.69
       BUFFER ___________________________________128 Kbyte
       INTERFACE ________________________________SCSI
       BYTES PER TRACK __________________________
       SECTORS PER DRIVE ________________________409,760
       TPI (TRACKS PER INCH) ____________________2,750
       BPI (BITS PER INCH) ______________________45,500
       FCI (FLUX DENSITY) _______________________30,300
       AVERAGE ACCESS (ms) ______________________16
       SINGLE TRACK SEEK (ms) ___________________5
       MAX FULL SEEK (ms) _______________________27
       MTBF (power-on hours) Office _____________150,000
       SHOCK (G's) operating/nonoperating _______10/150
          NG model with 'SafeRite' ______________100/150
       POWER REQUIREMENTS: +5V START-UP (amps) __1.3
       POWER MANAGEMENT (Watts):
                           ACTIVE _______________2.5
                           STANDBY ______________1.8
                           SHUTDOWN _____________1.08
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl) _______________________AUTO
       IBM AT DRIVE TYPE ________________________0


       Physical:
                        Height (inches/mm):     0.75/19.05
                        Width  (inches/mm):     2.76/70.10
                        Depth  (inches/mm):     4.01/101.85
                        Weight    (ozs/kg):     7.25/0.21


ZBR = Zone Bit Recording = Variable sectors per track

Seagate reserves the right to change, without notice, product
offerings or specifications. (08/17/93)


