Hard Drive: CMI: CM-6426S 21MB 5.25"/FH MFM ST412

C M - 6 4 2 6 S    CMI
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders     640|     |     |
Capacity form/unform    21/      MB        Heads           4|     |     |
Seek time   / track  39.0/     ms          Sector/track   17|     |     |
Controller           MFM / ST412           Precompensation   300
Cache/Buffer               KB              Landing Zone      639
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                 |
Power: sleep              W     Humidity     %                 |
       standby            W     Altitude    km                 |
       idle               W     Shock        g                 |
       seek               W     Rotation   RPM
       read/write         W     Acoustic   dBA
       spin-up            W     ECC        Bit
                                MTBF         h
                                Warranty Month
Lift/Lock/Park     NO           Certificates                                  

Layout

CMI CM-6426S PRODUCT DESCRIPTION

  +---------------------------------------------------------+
  |                                                         |XX
  |                                                         |XX J2
  |                                                         |XXData
  |                                                         |XX
  |                                                         |  1
  |                                                         |
  |                                                    J5+-+|XX
  |                                                      | ||XX
  |                                                      1-+|XX
  |                                   Terminator  +-------+ |XX J1
  |                                   Resistor    +-------+ |XX
  |                                                         |XXControl
  |                                                         |XX
  |                                                         |XX
  |                                                         |  1
  |                                                         |XX J3
  |                                                         |XX Power
  +---------------------------------------------------------+

Jumpers

CMI CM-5412/6426 PRODUCT DESCRIPTION

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

 J5  Drive Select
 ----------------
   +----------+--------------------------------+
   | Drive    |            Jumpers             |
   | Select   |   4   |   3   |   2   |   1    |
   +----------+-------+-------+-------+--------+
   |    1     | OPEN  | OPEN  | OPEN  | CLOSED |
   |    2     | OPEN  | OPEN  | CLOSED| OPEN   |
   |    3     | OPEN  | CLOSED| OPEN  | OPEN   |
   |    4     | CLOSED| OPEN  | OPEN  | OPEN   |
   +----------+-------+-------+-------+--------+

The other jumpers are not used and should be left open!