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Hard Drive: RODIME: RO202E 21MB 5.25"/FH MFM ST506




R O 2 0 2 E    RODIME
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders     640|     |     |
Capacity form/unform    21/   27 MB        Heads           4|     |     |
Seek time   / track  60.0/ 8.0 ms          Sector/track   32|     |     |
Controller           MFM / ST506           Precompensation
Cache/Buffer               KB              Landing Zone      639
Data transfer rate    0.625 MB/S int       Bytes/Sector      256
                      0.625 MB/S ext
Recording method     MFM                            operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C        10 50    |
Power: sleep              W     Humidity     %        10 85    |
       standby            W     Altitude    km                 |
       idle               W     Shock        g         3       |     30
       seek               W     Rotation   RPM      3600
       read/write         W     Acoustic   dBA
       spin-up            W     ECC        Bit   24
                                MTBF         h      12000
                                Warranty Month
Lift/Lock/Park     NO           Certificates                                  

Layout

RODIME RO 200E SERIES USER MANUAL P/N USM0038 REV. B

  +---------------------------------------------------------+
  |                                                         |XX J3
  |                                                         |XX Power
  |                                                         |
  |                                                         |XX
  |                                                      ++ |XX
  |                                             Terminator| |XX
  |                                             Restistor|| |XX J1
  |                                             Pack     || |XX
  |                                                      ++ |XX
  |                                                     1-+ |XX
  |                                               Drive | | |
  |                                               Select| | |
  |                                               Switch+-+ |XX
  |                                                         |XX J2
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  +---------------------------------------------------------+

     +--------------------------------------+
     |                                      |
     |                                      |
     |      Drive                           |
     |      Select                          |
     +------+----1-+Terminator-++-----------+
     |      +----+ +--------+  +J4 Ground   |
     |                                      |
     |   J2             J1            J3    |
     +..........--XXXXXXXXXXXXXXXXX-XXXXXXXX+
     +--Data---------Control---------Power--+

Jumpers

RODIME RO 200E SERIES USER MANUAL P/N USM0038 REV. B

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

Drive Select
------------
Up to four drives may be connected to one host in a "daisy-chain"
fashion. A 4-pole drive select switch is fixed to each drive. To
identify a drive as number 1, close the first pole of this switch
nearest the terminator pack. Similarly for drives 2, 3 and 4. Only
ONE pole should be in the closed position. All "daisy-chained" drives
should have the line terminator pack removed except for the last
drive in the chain. All drives are supplied for single usage, that
is, pole 1 is closed and the terminator pack is present.

        +------+------+------+------+------+
        |Drive |Pole  |Pole  |Pole  |Pole  |
        |Select|  1   |  2   |  3   |  4   |
        +------+------+------+------+------+
        |  1   |CLOSED|OPEN  |OPEN  |OPEN  |
        +------+------+------+------+------+
        |  2   |OPEN  |CLOSED|OPEN  |OPEN  |
        +------+------+------+------+------+
        |  3   |OPEN  |OPEN  |CLOSED|OPEN  |
        +------+------+------+------+------+
        |  4   |OPEN  |OPEN  |OPEM  |CLOSED|
        +------+------+------+------+------+

 J3   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

Install

RODIME RO 200E SERIES USER MANUAL P/N USM0038 REV. B

Notes on Installation
=====================

Drive mounting
--------------

     horizontally             vertically
   +-----------------+   +--+             +--+ +------------------+
   |                 |   |  +-----+ +-----+  | |                  | x
   |                 |   |  |     | |     |  | x+----------------+x
 +-+-----------------+-+ |  |     | |     |  | ||x              x||
 +---------------------+ |  |     | |     |  | ||  x          x  ||
                         |  |     | |     |  | ||    x      x    ||
      x           x      |  |     | |     |  | ||      x  x      ||
 +------x------x-------+ |  +-----+ +-----+  | ||       xx       ||
 +-+------x--x-------+-+ +--+             +--+ ||     x    x     ||
   |       xx        |                         ||   x        x   ||
   |     x    x      |                         || x            x ||
   +---x--------x----+                         |x                x|
     x            x                           x++----------------++x

Side brackets with tapped holes (6/32" UNC) are provided with each
drive and permits base or side mounting. These brackets are fixed to
the drive chassis via shock-absorbing grommets. The drive MAY BE
ORIENTED IN ANY AXIS. When installing into an enclosure, at least 0.1
inch clearance must be maintained around the entire drive to allow
vibration isolation and to prevent obstruction of the breather filter
and the creation of ground loops.

Connectors
----------
The RO 200E drive interfaces to host systems via ST506 interface
which has become an accepted standard for 5 inch Winchester disc
drives. There are separate connectors for data (MFM code), for
control lines and for DC power. A chassis ground tab is also
provided. The convention for control is that a TTL logical zero is
false and a TTL logical one is false. Up to four drives may be
connected to a host system and each drive is provided with a four-
pole switch for selection. The control lines may be daisy-chained but
the data lines MUST be radially (individually) connected to the host.

Control signals for the drive are provided via the 34 pin edge
connector (P1/J1). The pins are numbered 1 through 34 with the even
pins located on the solder side of the board. Pin 2 is located on
the end of the board connector closest to the DC power connector and
is labelled. A key slot is provided between pins 4 and 6. The
recommended mating connector is AMP ribbon connector A/N 88373-3.

Radial connection of read/write data signals is provided via a 20 pin
edge connector (P2/J2). The pins are numbered 1 through 20 with the
even pins located on the solder side of the board. The recommended
mating connector is AMP ribbon connector A/N 88373-6.

DC power is provided via a 4 pin AMP Mate-N-Lok connector (P7/J7)
P/N 350211-1, or equivalent, mounted via the solder side of the
board. The recommended mating connector is AMP P/N 1-480424-0
utilising AMP pins P/N 350078-4.

A ground connection is provided via a "Faston" connector AMP P/N
61664-1 located on a metal stand-off on the chassis between the
power and control signal connectors. However, the DC and chassis
grounds are common on the drive and the use of the "Faston" connec-
tor is not essential. The frame ground of the host system should be
aproperly earthed.

In general, any controller which will operate with the RO 100 and
RO 200 series disk drives will also operate with the RO 200E series
disk drive. However, the controller must be able to address up to 640
cylinders and set the STEP interval in the range 5 s to 5ms.

Cable Interconnection - 4 Drive System
--------------------------------------

       HOST
   +-----------+                                +-----------------+
   |           +---o---Control------------------+J1     Drive 1   |
   |           |   |    +-------Data------------+J2               |
   |           |   |    |             +-Power---+J3  J4           |
   |           |   |    |             |         +-----+-----------+
   |           |   |    |             |    +-Frame----+
   |           |   |    |             |    |    +-----------------+
   |Controller |   o----+-------------+----+----+J1     Drive 2   |
   |           |   |    | +-----------+----+----+J2               |
   |           |   |    | |           o----+----+J3  J4           |
   |           |   |    | |           |    |    +----+------------+
   |           |   |    | |           |    o---------+
   |           |   |    | |           |    |    +-----------------+
   +-----------+   o----+-+-----------+----+----+J1     Drive 3   |
   |           |   |    | | +---------+----+----+J2               |
   |           +---+----+ | |         o----+----+J3  J4           |
   |           +---+------+ |         |    |    +-----+-----------+
   |           |   |        |         |    o----------+
   |Data       +---+--------+         |    |    +-----------------+
   |Separator  |   +------------------+----+----+J1     Drive 4   |
   |           +----------------------+----+----+J2               |
   |           |                      o----+----+J3  J4           |
   +-----------+                      |    |    +-----+-----------+
                       DC voltages----+    o----------+
                                           |
                                           +------- Frame Ground

Note that, in the multiple drive configuration all data interface
lines are radially connected to the host.

 Drive Control Interface
 -----------------------
 All input lines on the control interface are terminated by a 220 ohm
 resistor to +5V, and a 330 ohm resistor to logic ground. The input
 line receivers and output line drivers are 74LS244 buffers with tri-
 state outputs.

Features

RODIME RO 200E SERIES USER MANUAL P/N USM0038 REV. B

Introduction
------------
The Rodime RO 200E series of 5 inches (130 mm) Winchster disk drives
provides fast access data storage for use with small business
computers, terminal and microprocessor based systems. There are four
models in the series, RO 201E, RO 202E, RO 203E and RO 204E.

 Seek Time
 ---------
       +----------------------------------+--------+
       |                                  | RO 200 |
       +----------------------------------+--------+
       |Track-to-Track         msec. typ. |   8    |
       +----------------------------------+--------+
       |Average                msec. typ. |  60    |
       |                       msec. max. | 130    |
       +----------------------------------+--------+
       |Latency                msec. avg. |   8.3  |
       +----------------------------------+--------+

Indicator and Fault Codes
-------------------------
Two red LED's fixed to the master electronics board are visible
through the facia when they are illuminated.

The "Power-On" LED is on when the drive is READY with no error
condition present. It is also used to indicate fault conditions to
the driev.

The "Select" LED is on when the drice is selected by the host
provided the "Power-On" LED is on.

The "Power-On" LED is positioned closest to the centre of the facia.
It is used to flash error messages should certain fault conditions
arise on the drive. A four bit binary code is used (long flash =
logical 1, short flash = logical 0) with the most significant bit
occurring first:

e.g. Short, short, long, short = 2 (0010)

    +------------+--------------------------------------------------+
    | Fault Code | Description                                      |
    +------------+--------------------------------------------------+
    | 01 (0001)  | No index track data burst                        |
    +------------+--------------------------------------------------+
    | 02 (0010)  | No Flag zero                                     |
    +------------+--------------------------------------------------+
    | 03 (0011)  | Motor speed outside +/- 1% tolerance at end of   |
    |            | power-up sequence                                |
    +------------+--------------------------------------------------+
    | 04 (0100)  | Motor speed outside +10%, tolerance in normal    |
    |            | operation                                        |
    +------------+--------------------------------------------------+
    | 05 (0101)  | Flag zero stays TRUE                             |
    +------------+--------------------------------------------------+
    | 06 (0110)  | STEP received while WRITE GATE is TRUE           |
    +------------+--------------------------------------------------+
    | 07 (0111)  | WRITE FAULT                                      |
    +------------+--------------------------------------------------+
    | 08 (1000)  | Not used                                         |
    +------------+--------------------------------------------------+
    | 09 (1001)  | Not used                                         |
    +------------+--------------------------------------------------+
    | 10 (1010)  | No INDEX                                         |
    +------------+--------------------------------------------------+
    | 11 (1011)  | Motor not up to speed                            |
    +------------+--------------------------------------------------+

Fault codes 1, 2, 3, 5, 10 and 11 are monitored during the initial
power-up sequence of the drive. The remaining codes, namely 4, 6 and
7 are constantly monitored during normal operation. All fault codes
are latched by the processor and the drive must be restarted to
clear. Codes 3, 4, 10 and 11 generate an interface WRITE FAULT as do
those fault conditions leading to code 7.

Illegal Address Map
-------------------
Each drive is accompanied by a map indicating the addresses of
sectors which should not be used by the host. This map (label) is
fixed to the base casting wall. These illegal sectors have been
identified during unit test in the factory and contain a repeatable
disk defect, greater than one bit in length. No such illegal address
will exist in cylinders 0, 1 and 2.

An illegal address is specified by cylinder, head and sector. It
should be noted that the format used for this purpose is 33 sectors
of 256 bytes each. The maximum number of illegal addresses is:

Model Number 201E 202E 203E 204E
Max. number of illegal addresses 5 10 15 20

Precompensation
---------------
Precompensation of write data is recommended to be applied to all
cylinder.













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