
S T 4 2 1 0 0 N D           W R E N   9    SEAGATE
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders    2573|     |     |
Capacity form/unform  1900/      MB        Heads          15|     |     |
Seek time   / track  12.9/     ms          Sector/track   96|     |     |
Controller           SCSI2 DIFFERENTIAL    Precompensation
Cache/Buffer           256 KB              Landing Zone
Data transfer rate    3.875 MB/S int       Bytes/Sector      512
                     10.000 MB/S ext SYNC
Recording method     RLL 1/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C                 |
Power: sleep              W     Humidity     %                 |
       standby            W     Altitude    km                 |
       idle               W     Shock        g                 |
       seek          21.0 W     Rotation   RPM      3600
       read/write         W     Acoustic   dBA
       spin-up            W     ECC        Bit
                                MTBF         h     150000
                                Warranty Month        60
Lift/Lock/Park     YES          Certificates


**********************************************************************
                        L   A   Y   O   U   T
**********************************************************************
SEAGATE  ST42100N/ND  PRODUCT MANUAL

  +---------------------------------------------------------+
  | +-+                                                     |+-1
  | | | J6                                                  || |J4
  | +-+                                                     |+-+
  |                                                     ++  |XX
  |                                                     ||  |XX
  |                                                     ||  |XX
  |                                     Terminator      +1  |XX J3
  |                                     resistor        ++  |XX SCSI
  |                                     (SIPs)          ||  |XX I/O
  |                                                     ||  |XX
  |                                                     +1  |XX
  |                                                     ++  |XX
  |                                                     ||  |XX
  |                                                     ||  |X1
  |                                                     +1  |
  | +-+J7                                                   |XX Power
  | +-+ LED                                                 |XX
  +---------------------------------------------------------+  1



**********************************************************************
                      J   U   M   P   E   R   S
**********************************************************************
SEAGATE  ST42100N/ND  JUMPER SETTING

 Jumper setting
 ==============

 J4 SCSI ID/Option Select Header
 -------------------------------
                                            +-----
                                            |O O O
 -PWA---+-2--4--6--8--10-12-14-16-18-20+----+
        | o  o  o  o  o  o  o  o  o  o |    |O O
        | o  o  o  o  o  o  o  o  o  o |    +-----
        +-1--3--5--7--9--11-13-15-17-19+
          |  |  +--+--+  |  |  |  +--+-- Synchronous Spindle option
          |  |     |     |  |  +-------- Motor Start Delay (16s * ID)
          |  |     |     |  +----------- Parity check enable
          |  |     |     +-------------- Motor start option enable
          |  |     +-------------------- SCSI ID
          |  +-------------------------- Terminator power
          +----------------------------- Terminator power



 J4  1-2/3-4  Terminator Power
 -----------------------------
   +-2-4---        +-2-4---          +-2-4---
   | X o           | o X             | o o
   | X o           | o X             | xxx
   +-1-3-          +-1-3-            +-1-3-
 Terminator Power  Terminator Power   Terminator Power
 from Drive        to SCSI Bus        from SCSI Bus
 (DEFAULT)


 J4  SCSI ID
 -----------
   +----------+-----------------------+
   | SCSI ID  |        Jumpers        |
   |          | 5-6   | 7-8   | 9-10  |
   +----------+-------+-------+-------+
   |    0     | OPEN  | OPEN  | OPEN  |
   +----------+-------+-------+-------+
   |    1     | OPEN  | OPEN  | CLOSED|
   +----------+-------+-------+-------+
   |    2     | OPEN  | CLOSED| OPEN  |
   +----------+-------+-------+-------+
   |    3     | OPEN  | CLOSED| CLOSED|
   +----------+-------+-------+-------+
   |    4     | CLOSED| OPEN  | OPEN  |
   +----------+-------+-------+-------+
   |    5     | CLOSED| OPEN  | CLOSED|
   +----------+-------+-------+-------+
   |    6     | CLOSED| CLOSED| OPEN  |
   +----------+-------+-------+-------+
   |    7     | CLOSED| CLOSED| CLOSED|
   +----------+-------+-------+-------+


 J4 11-12 Motor Start Option
 ---------------------------
 11-12 CLOSED  Enables the Motor Start Option. In this mode of
               operation the drive will wait for a Start Unit Command
               from the Host before starting the Motor.


 J4 13-14  Parity Check
 ----------------------
 13-14 CLOSED  Parity checking is enabled.


 J4 15-16  Motor Start Delay
 ---------------------------
 Jumper on enables delayed motor start (Motor Start jumper must be
 off). Motor start up is delayed 16 times drive ID number  in seconds;
 i.e., Drive 0 starts immediately, Drive 1 starts 16 seconds later,
 Drive 2 starts 16 seconds after Drive 1, etc.



 J6  Write Protect/Remote LED Header
 -----------------------------------
                +------- GND              Pin 1 (+5V) Remote LED
           +----+----+                    connection
           | 2  o  x +---- Reserved
           | 1  o  x +---- Reserved
           +----+----+
                +------- Write Protect Remote

 The Write Protect/Remote LED Header is a 6-pin, 3 jumper (or
 connector) position header behind the front panel at the right side
 of the drive, opposite the LED. The pins are on 0.100 inch (2.54 mm)
 centers both vertically and side to side. A suggested mating two pin
 connector is the DuPont Mini Latch housing P/N 65291-008 or
 equivalent. The drive front panel must not be present in order to
 access the header. For a remote LED capability, plug the remote LED
 cable connector vertically to the leftmost two pins of the header.
 The center two pins provide a drive write protect capability. A
 shorting jumper plug may be plugged vertically onto these two pins to
 write protect the drive or a two-pin cable connector may be plugged
 there to connect the two pins to a remote Write Protect switch. The
 rigthmost two pins are RESERVED for factory use only.


 DC Power and pin connector assignments
 --------------------------------------
    --+------------+-- pin 1    +12 VDC
      | 4  3  2  1 |   pin 2    +12 Volts Return
      +------------+   pin 3    + 5 Volts Return
                       pin 4    + 5 VDC

 Note: Pins on the drive select and configuration select header are
 provided to facilitate manual drive configuration. No devices other
 than jumpers should be connected to these pins. Improper connection
 to external devices (switches, connectors, etc.) could adversely
 affect drive performance. Exact location of these pins and headers
 may change without notice.


