
S T 4 1 6 5 1 N D    SEAGATE
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders    2107|     |     |
Capacity form/unform  1415/ 1650 MB        Heads          15|     |     |
Seek time   / track  15.0/ 2.5 ms          Sector/track   87|     |     |
Controller           SCSI2 DI/FAST         Precompensation
Cache/Buffer           256 KB READ-AHEAD   Landing Zone
Data transfer rate    4.000 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        10 50    |    -10 54
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        12
Lift/Lock/Park     YES          Certificates


**********************************************************************
                        L   A   Y   O   U   T
**********************************************************************
SEAGATE  ST41651N  PRODUCT DESCRIPTION

  +---------------------------------------------------------++-1
  | +-+ J6                                                  || |J4
  | | |                                                 ++  |+-+
  | +-+                                                 ||  |XX
  |                                                     ||  |XX
  |                                                     +1  |XX
  |                                     Terminator      ++  |XX J3
  |                                     resistor        ||  |XX SCSI
  |                                     (SIPs)          ||  |XX I/O
  |                                                     +1  |XX
  |                                                     ++  |XX
  |                                                     ||  |XX
  |                                                     ||  |XX
  |                                                     +1  |XX
  |                                                  (J8+-+)|X1
  |                                                  (  +-+)|
  | +-+J7                                                   |XX Power
  | +-+ LED                                                 |XX  J1
  +---------------------------------------------------------+  1



**********************************************************************
                      J   U   M   P   E   R   S
**********************************************************************
SEAGATE  ST41651N  PRODUCT DESCRIPTION

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



  J4  SCSI ID/Option Select Header (20-pin)
  -----------------------------------------
    -------+--------------J4--------------+---
           | o  o  o  o  o  o  o  o  o  o |
           | 1  o  o  o  o  o  o  o  o  o |
           +-------+--+--+----------------+
            TP TP  4  2  1 (2)(3)(6) +-++
             (4)                      (7)



 Drive ID/Option Select Header (Addendum) (16-Pin)
 -------------------------------------------------

                        SCSI I/O
                    +-----J3----   -+      +J1-
 --+------J4-------++:::::::      ::++-J8+-+O O O  Power
   |2 o o o o o o o|+-------      --+|o o| +-------
   |1 o o o o o o o|                 |1 o|
   +----+-+-+------+                 +---+
    +++ 4 2 1 | | + (6)               (4)
    (7)       | +-- (3)
              +---- (2)


 The figure above shows the drive ID select and configuration option
 select jumper headers (J4 and J8) that apply to some early customer
 development units. Only a few of these will be shipped. This
 addendum figure will be included in the preliminary Product Manual
 until the drives being shipped change over to the PWA that has the
 configuration shown in the first figure. The notes (1) through (7)
 apply the same to either figure.

      +------------+----------+
      |            | 4  2  1  |
      +------------+----------+  Drive ID in binary coded jumper
      |SCSI ID = 0 | o  o  o  |  position (most significant bit on
      |            | o  o  o  |  left), i.e., jumper in position 1
      +------------+----------+  would be Drive ID 1, no jumpers means
      |SCSI ID = 1 | o  o  x  |  ID 0.
      |            | o  o  X  |
      +------------+----------+
      |SCSI ID = 2 | o  x  o  |
      |            | o  X  o  |
      +------------+----------+
      |SCSI ID = 3 | o  x  x  |
      |            | o  X  X  |
      +------------+----------+
      |SCSI ID = 4 | x  o  o  |
      |            | X  o  o  |
      +------------+----------+
      |SCSI ID = 5 | x  o  x  |
      |            | X  o  X  |
      +------------+----------+
      |SCSI ID = 6 | x  x  o  |
      |            | X  X  o  |
      +------------+----------+
      |SCSI ID = 7 | x  x  x  |
      |            | X  X  X  |
      +------------+----------+

 (2)  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.
      OPEN    see Note (6) below for description of delayed motor
              start feature.

 (3)  CLOSED  Parity checking by the WREN 8 is enabled.

 (4)  If the unit is not be terminated, remove terminator resistor
      module SIPs. TP Jumper in left vertical position means
      terminator power (+5V) is from WREN 8 power connector. Jumper
      in horizontal position means terminator power is taken from
      interface cable. Jumper in right TP position means +5V is
      supplied to the interface cable pin 26. Jumpers can be in both
      vertical positions at same time. If the drive is not terminated,
      the TP jumper need not be installed.

 (6)  Jumper on enables delayed motor start (Motor Start jumper (2)
      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.

 (7)  CLOSED  Configures the drive for non-synchronized Spindle
              option. A four pin connector plugs here to provide the
              Reference Index Signal.


 J6  Write Protect/Remote LED Header
 -----------------------------------
  +-+J7 LED          +------- GND              Pin 1 (+5V)
 -+-+-----------+----+----+----                Pin 2 LED ON/OFF signal
                | 2  o  x +---- Factory use only!
                | 1  o  x +---- Factory use only!
                +----+----+
                     +------- Write Protect, Remote switch Cable
                              Connection

 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 (as
 viewed from the front of the drive). 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.


