Hard Drive: MINISCRIBE: M3425 PLUS 20MB 5.25"/HH MFM ST412

M 3 4 2 5   P L U S    MINISCRIBE
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/HH              Cylinders     615|     |     |
Capacity form/unform    20/   21 MB        Heads           4|     |     |
Seek time   / track  55.0/15.0 ms          Sector/track   17|     |     |
Controller           MFM / ST412           Precompensation   128
Cache/Buffer               KB              Landing Zone
Data transfer rate    0.625 MB/S int       Bytes/Sector      512
                      0.625 MB/S ext
Recording method     MFM                            operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         4 50    |
Power: sleep              W     Humidity     %                 |
       standby            W     Altitude    km                 |
       idle          21.5 W     Shock        g                 |
       seek               W     Rotation   RPM      3600
       read/write         W     Acoustic   dBA
       spin-up            W     ECC        Bit
                                MTBF         h      20000
                                Warranty Month
Lift/Lock/Park     NO           Certificates                                  

Layout

MINISC. 3425P/3438P/3650/3675 PRODUCT DESCRIPTION

  +-------------------------------------------------------+
  |                                                       |XX Power
  |                                                       |XX
  |                                                       |
  |                                                       |XX
  |                                                       |XX Control
  |                                                       |XX Cable
  |                                                       |XX J1
  |                                                       |XX
  |                                                       |XX
  |                                                       |XX
  |                                               DS0+-+  |
  |                                               DS1| |  |XX
  |                                               DS2| |  |XX
  |                                               DS3| |  |XX
  |                                               JP3| |  |XX Data
  |                                +RP1------+    JP2| |  |XX Cable
  |                                +---------+    JP1+-+  |XX J2
  +-------------------------------------------------------+

Jumpers

MINISC. 3425P/3438P/3650/3675 PRODUCT DESCRIPTION

Jumper Setting
==============

 Drive Select
 ------------
 +-----------------+---------+-------+-------+-------+
 |                 |   DS0   | DS1   | DS2   | DS3   |
 +-----------------+---------+-------+-------+-------+
 |Drive Select 0   |  CLOSED | OPEN  | OPEN  | OPEN  |
 +-----------------+---------+-------+-------+-------+
 |Drive Select 1   |   OPEN  | CLOSED| OPEN  | OPEN  |
 +-----------------+---------+-------+-------+-------+
 |Drive Select 2   |   OPEN  | OPEN  | CLOSED| OPEN  |
 +-----------------+---------+-------+-------+-------+
 |Drive Select 3   |   OPEN  | OPEN  | OPEN  | CLOSED|
 +-----------------+---------+-------+-------+-------+

Drive Cabling
-------------
If you are connecting the drive with a straight (non-twisted) 34 pin
control cable, verify that the drive select jumper is on DS0. If you
are using a twisted 34 pin control cable (5 wire twist), move the
drive select jumper to DS1.

Verify that both the 20 pin data cable and the 34 pin control cable
are connected to pin 1 at the drive connectors and pin 1 of the
controller board connector.

Note: The colored edge of both ribbon cables represents pin 1.

If the drive will be the secondary device of a two-drive setup re-
move terminating resistor RP1.

Features

MINISC. 3425P/3438P/3650/3675 PRODUCT DESCRIPTION

Formatting Guidelines
---------------------
Before a hard disk drive can be used, 3 steps must be completed:

 1. The drive must be low-level formatted to establish communications
    with the disk drive and controller board.

 2. The drive must be partitioned into one or more logical drives. Use
    the fdisk programm from DOS versions 3.3 or higher or partioning
    software like Disk Manager or Speedstor.

 3. The drive must be high-level formatted to prepare it for the
    operating system installation. Use the DOS format command or Disk
    Manager/Speedstor software.

XT 8086/8088 Installation
-------------------------
Use the utilities from any 8 bit controller board to low-lwvel format
the drive. Typical routinetis to use the DOS debug command to address
these utilities. If the low-level format program of the controller
asks for step pulse rate or control byte values, use the controller
default values.

AT 80286/80386 Installation
---------------------------
Use the MiniScribe version of Ontrack Disk Manager software or the
Universal version of Speedstor software of the entire formatting
process.