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Hard Drive: CDC: WREN VFH 94181-385M 330MB 5.25"/FH SCSI1 MAC




W R E N   V F H   9 4 1 8 1 - 3 8 5 M    CDC
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders     791|     |     |
Capacity form/unform   330/  385 MB        Heads          15|     |     |
Seek time   / track  10.7/ 3.0 ms          Sector/track   55|     |     |
Controller           SCSI1 MAC             Precompensation
Cache/Buffer            32 KB LOOK-AHEAD   Landing Zone
Data transfer rate    1.875 MB/S int       Bytes/Sector      512
                      4.700 MB/S ext SYNC
Recording method     RLL 2/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C                 |
Power: sleep              W     Humidity     %                 |
       standby            W     Altitude    km                 |
       idle          21.0 W     Shock        g        10       |     32
       seek               W     Rotation   RPM      3600
       read/write         W     Acoustic   dBA
       spin-up       59.0 W     ECC        Bit
                                MTBF         h     100000
                                Warranty Month
Lift/Lock/Park     YES          Certificates

Layout

SEAGATE ST4385N PRODUCT SPECIFICATION

  +---------------------------------------------------------+
  |                                                         |+-+
  |                                                         || |J4
  |                                                         |+-+
  |                                         see Note (1)++  |XX
  |                                                     ||  |XX
  |                                                     ||  |XX
  |                                     Terminator      +1  |XX J3
  |                                     resistor     (1)++  |XX SCSI
  |                                     (SIPs)          ||  |XX I/O
  |                                                     ||  |XX
  |                                                     +1  |XX
  |                                                  (1)++  |XX
  |                                                     ||  |XX
  |                                                     ||  |XX1
  |                                                     +1  |
  |                                                         |XX Power
  |                                                         |XX
  +---------------------------------------------------------+  1
 NOTE
 If you have #77701215k silk-screened near the 50-pin SCSI cable
 connector, the pin-1 for the 3 terminating resistors is away from the
 DC power connector.

Jumpers

SEAGATE ST4385N PRODUCT SPECIFICATION

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

 J4 SCSI ID/Option Select Header
 -------------------------------
                                    +-----
                                    |O O O
 -PWA---+2--4--6--8--10-12-14-16----+
        |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
         |  |  +--+--+  |  |  +-------- RESERVED (some PWA's do not
         |  |     |     |  |            have these pins)
         |  |     |     |  +----------- Parity check enable
         |  |     |     +-------------- Motor start option enable
         |  |     +-------------------- SCSI ID
         |  +-------------------------- Terminator power
         +----------------------------- Terminator power

 J4  1-2/3-4  Terminator Power
 -----------------------------
   +-2-4---        +-2-4---
   | X x           | o x
   | X o           | xxx
   +-1-3-          +-1-3-
 Terminator Power  Terminator Power
 from Drive        from SCSI Bus

 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.

 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

The drive is already low-level formatted at the factory.













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