Hard Drive: SIEMENS NIXDORF: 4420 335MB 5.25"/FH SCSI1 SE

4 4 2 0    SIEMENS NIXDORF
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders    1100|     |     |
Capacity form/unform   335/  383 MB        Heads          11|     |     |
Seek time   / track  16.5/ 5.0 ms          Sector/track   54|     |     |
Controller           SCSI1 SINGLE-ENDED    Precompensation
Cache/Buffer            32 KB FIFO BUFFER  Landing Zone
Data transfer rate    1.500 MB/S int       Bytes/Sector      512
                      4.000 MB/S ext SYNC
Recording method                                    operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C        10 50    |
Power: sleep              W     Humidity     %        20 80    |
       standby            W     Altitude    km                 |
       idle               W     Shock        g                 |
       seek               W     Rotation   RPM      3558
       read/write    27.0 W     Acoustic   dBA
       spin-up            W     ECC        Bit   48
                                MTBF         h      40000
                                Warranty Month
Lift/Lock/Park     YES          Certificates                                  

Layout

EZI MEGAFILE SCSI PRODUCT DESCRIPTION REV. A, AUGUST 1987

  +----------------------------------------------xxxxxxxxJ10+
  |                                   Terminator xxxxxxxx   |XXI
  |                                   Resistor Packs     J9 |XXN
  |                                                         |XXT
  |                                                         |XXE
  |                                                         |XXR
  |                                                         |XXF  J1
  |                                                         |XXA
  |                                                         |XXC
  |                                                         |XXE
  |                                                         |1X
  |                                                         |+-J2
  |                                                         || |ID
  |                                                         || |
  |                                                         |1-+
  |                                                         |XX
  |                                                         |XX J3
  +---------------------------------------------------------+1  Power

      +---------+------------------+---------+
      |         |                  |         |
      |         |X J18 Ground      |         |
      |         +------------------+         |
      |                                      |
      |   J3    J2              J1           |
      | XXXXX xxxxxxx XXXXXXXXXXXXXXXXXXXXXXX|
      +-1-----1-------1----------------------+

Jumpers

EZI MEGAFILE SCSI PRODUCT DESCRIPTIO REV. A, AUGUST 1987

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

J9 and J10 Terminators
-----------------------
All single-drive systems have terminators J9 and J10 installed. For
multi-drive systems, terminators J9 and J10 may only installed in the
last drive of a daisychain configuration. All drives are shipped with
the terminators installed.

J18 Grounding Connector
------------------------
The frame grounding connector (J18) is a Faston AMP P/N 61761-2 tap
connector. The recommended mating connector is AMP P/N 62187-1 or
equivalent. The hole in the Faston tap accomodates a wire size of
18 AWG.

Use of frame ground connection is recommended in order to reduce
ground loops which may result in electrical noise problems.

J2 Device address selection
----------------------------

                   +-------------- Parity
                   |  +----------- Spindle Control
                   |  |  +-------- Reset
       Addr. Filed |  |  |  +----- Write Protected
         +--+--+   |  |  |  |  +-- Reserved
        +--+--+--+--+--+--+--+--+
        |01|03|05|07|09|11|13|15|
        +--+--+--+--+--+--+--+--+
        |02|04|06|08|10|12|14|16|
    ----+--+--+--+--+--+--+--+--+------PC Board
   -------------------------------------

Device address selection
------------------------
The address of each MegaFile Series Drive is set by installing the
address jumper on J2 on the device electronics board. Each drive must
have a unique address. The sequence of addressing is optional. All
drives are shipped with address 0 preset.

   +----------+-----------------------+
   | SCSI ID  |        Jumpers        |
   |          | 5-6   | 3-4   | 1-2   |
   +----------+-------+-------+-------+
   |    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|
   +----------+-------+-------+-------+

J2 7,8 Parity check
--------------------
Jumper installed: Parity check enabled

J2 9,10 Spindle control
------------------------
Jumper installed: Automatic spin up

J2 11,12 Reset option
----------------------
Jumper installed: Hard SCSI reset

J2 13,14 Write protect
-----------------------
Jumper installed: Drive write protected