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Hard Drive: RODIME: RO3045 38MB 5.25"/FH MFM ST506




R O 3 0 4 5    RODIME
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders     872|     |     |
Capacity form/unform    38/   45 MB        Heads           5|     |     |
Seek time   / track  28.0/ 7.0 ms          Sector/track   17|     |     |
Controller           MFM / ST506           Precompensation   650
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        10 50    |    -40 70
Power: sleep              W     Humidity     %        10 85    |      5 90
       standby            W     Altitude    km    -0.305  3.048|        12.192
       idle           9.0 W     Shock        g        10       |     50
       seek               W     Rotation   RPM      3600
       read/write         W     Acoustic   dBA        50
       spin-up            W     ECC        Bit
                                MTBF         h      20000
                                Warranty Month
Lift/Lock/Park     YES          Certificates     CSA,FCC,UL1950               

Layout

RODIME RO 3000 SERIES DISK DRIVE PRODUCT SPECIFICATION PRO-00077

                                                    XXXXXXX P7 Power
  +---------------------------------------------------------+
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX P2
  |                                                         |XX Data
  |                                                         |XX
  |                                                         |XX
  |                                                         |
  |                                      Drive  +-+         |XX P1
  |++                                    Select | |         |XX
  |++                                           1-+     ++  |XX C
  |                                          Terminator ||  |XX O
  |                                          Resistor   ||  |XX N
  |                                          Pack       ||  |XX T
  |                                                     ||  |XX R
  |                                                     ++  |XX O
  |                                                         |X1 L
  +---------------------------------------------------------+

Jumpers

RODIME RO 3000 SERIES DISK DRIVE PRODUCT SPECIFICATION PRO-00077

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

Up to four RO 3000 series disk drives may be connected to any host
system. Each drive is provided with 4 pairs of pins to select the
drive for drives numbering from 1 to 4. A drive is selected by
shorting the relevant pair of pins with the jumper provided.

   +-----------+---------+---------+---------+---------+
   | Drive     |         |         |         |         |
   | Select    |Pins 1-2 |Pins 3-4 |Pins 5-6 |Pins 7-8 |
   +-----------+---------+---------+---------+---------+
   | Drive 1   |CLOSED   |OPEN     |OPEN     |OPEN     |
   +-----------+---------+---------+---------+---------+
   | Drive 2   |OPEN     |CLOSED   |OPEN     |OPEN     |
   +-----------+---------+---------+---------+---------+
   | Drive 3   |OPEN     |OPEN     |CLOSED   |OPEN     |
   +-----------+---------+---------+---------+---------+
   | Drive 4   |OPEN     |OPEN     |OPEN     |CLOSED   |
   +-----------+---------+---------+---------+---------+

 P7/J7  DC Power and pin connector assignments
 ---------------------------------------------
     +--------------+
     |+-----J3-----+|  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 3000 SERIES DISK DRIVE PRODUCT SPECIFICATION PRO-00077

Drive Mounting and Installation
-------------------------------
The RO 3000 series disk drives may be mounted in a host system in
any orientation. The shipping lock effectively locks the actuator
during shipment and releases on application of 12V.

When installing the drive into an enclosure, the breather holes on
the drive top cover must not be obstructed.

The drive may be mounted in any orientation. It is supplied complete
with antivibration mounts and threaded mounting brackets. The drive
is mounted using 6/32 UNC screws with maximum penetration of 0.25
inch.

The drive installation must provide adequate air flow to ensure that
the maximum HDA temperature does not exceed 60*C.

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

       HOST
   +-----------+                                +-----------------+
   |           +---o---Control------------------+P1/J1  Drive 1   |
   |           |   |    +-------Data------------+P2/J2            |
   |           |   |    |             +-Power---+P7/J7     ...    |
   |           |   |    |             |         +-----------------+
   |           |   |    |             |
   |           |   |    |             |         +-----------------+
   |Controller |   o----+-------------+---------+P1/J1  Drive 2   |
   |           |   |    | +-----------+---------+P2/J2            |
   |           |   |    | |           o---------+P7/J7     ...    |
   |           |   |    | |           |         +-----------------+
   |           |   |    | |           |
   |           |   |    | |           |         +-----------------+
   +-----------+   o----+-+-----------+---------+P1/J1  Drive 3   |
   +-----------+   |    | | +---------+---------+P2/J2            |
   |           +---+----+ | |         o---------+P7/J7     ...    |
   |           +---+------+ |         |         +-----------------+
   |           |   |        |         |
   |Data       +---+--------+         |         +-----------------+
   |Separator  |   +------------------+---------+P1/J1  Drive 4   |
   |           +----------------------+---------+P2/J2            |
   |           |                      o---------+P7/J7     XXX    |
   +-----------+                      |         +-----------------+
                       DC voltages----+

... = Terminator Pack removed

XXX = Terminator Pack installed

Up to four RO 3000 series disk drives may be connected to any host
system. When connecting more than one drive to the host, the control
lines may be "daisy-chained" but the data lines require to be
radially (individually) connected. Each drive is provided with a
removeable resistor pack for the control interface (J1) lines and
this pack must be removed from all except the last drive in the
chain.

J1/P1 Control Connector
------------------------
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 component side of the board. Pin 2 is located on
the end of the board connector farthest from 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.

J2/P2 Data Connector
---------------------
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 component side of the board. The recommended
mating connector is AMP ribbon connector A/N 88373-6.

J7/P7 Power Connector
----------------------
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.

Cabling
-------
It is recommended that the control and data interface signals should
be carried by flat ribbon or twisted pair cable of maximum length 20
feet. The power cables should likewise be twisted pairs of each line
voltage and return.

Radio Frequency Interference
----------------------------
Electric field shall not exceed 2 volts/meter r.m.s. in the range
1.5Hz to 10GHz.

Magnetic Field
--------------
There shall be no source of constant magnetic field which yields more
than 0.0005 Tesla measured in the location occupied by the magnetic
heads when the drive is installed.

Features

RODIME RO 3000 SERIES DISK DRIVE PRODUCT SPECIFICATION PRO-00077

Product Description
===================

General
-------
The RO 3000 series disk drives are random access storage devices
which use four 95mm magnetic disks to provide up to 63.5 Megabytes of
unformatted on line capacity.

A servo surface is used in conjunction with a rotary voice-coil
positioner to achieve an average access time of 28 msec.

A microprocessor with 4K of program memory is used for several drive
operations and for all positioner control functions. These include
velocity control for all seeks, fault detection and interface.

Mechanical Assemblies
---------------------
The drive uses the sealed enclosure principle of Winchester head/disk
technology and provides a minimum contamination environment to
maintain head/media integrity.

An internal filter minimizes airborne contaminants within the drive
housing. A breather filter on the drive housing cover reduces the
ingress of contaminants through the bearings of the disk motor by
minimising the pressure drop across them.

Recording Heads and Disks
-------------------------
The drive contains four disks with one read/write head per disk sur-
face. One surface is dedicated to the servo information for the
positioner.

The electrical interface between the recording heads and the
electronics board is by means of a flat flexible circuit cable which
incorporates the pre-amplifier circuits for all of the recording
heads.

Indicator and Fault Codes
-------------------------
A red LED indicator is provided on the facia and indicates that the
drive is selected and ready. This LED is also used to flash error
codes should certain fault conditions arise in the drive.

The "Selected and Ready" LED 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 occuring first:

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

    +------------+--------------------------------------------------+
    | Fault Code | Description                                      |
    +------------+--------------------------------------------------+
    | 01 (0001)  | No sync.                                         |
    +------------+--------------------------------------------------+
    | 02 (0010)  | No Track Zero                                    |
    +------------+--------------------------------------------------+
    | 03 (0011)  | Motor speed outside +/- 1% tolerance after       |
    |            | power-up                                         |
    +------------+--------------------------------------------------+
    | 04 (0100)  | Motor speed outside +10%, -5% tolerance in normal|
    |            | operation                                        |
    +------------+--------------------------------------------------+
    | 05 (0101)  | Seek error                                       |
    +------------+--------------------------------------------------+
    | 06 (0110)  | STEP received while WRITE GATE is TRUE           |
    +------------+--------------------------------------------------+
    | 07 (0111)  | WRITE FAULT                                      |
    +------------+--------------------------------------------------+
    | 08 (1000)  | Microprocessor self-test fail (RAM)              |
    +------------+--------------------------------------------------+
    | 09 (1001)  | Microprocessor self-test fail (ROM)              |
    +------------+--------------------------------------------------+
    | 10 (1010)  | No INDEX                                         |
    +------------+--------------------------------------------------+
    | 11 (1011)  | Motor not up to speed                            |
    +------------+--------------------------------------------------+
    | 14 (1110)  | Failed power up offset calibration               |
    +------------+--------------------------------------------------+
    | 15 (1111)  | Failed power up access time calibration          |
    +------------+--------------------------------------------------+

Illegal Addresses
-----------------
Each drive will be accompanied by a map indicating the number of
bytes from INDEX which should not be used by the host. These will be
identified by cylinder, head and byte number. No illigal addresses
will exist in cylinders 0 and 1. This map will be supplied on a label
fixed to the drive as well as an accompanying documentation. The
maximum number of illigal addresses is as follows:

                    RO 3055   : 35
                    RO 3045   : 30
                    RO 3065   : 40

Data Access Time
----------------
The data access time is defined as the cylinder access time plus
rotational latency of the required address.

Average latency: 8.3 ms
Average data access time ramp mode: 36.3 ms
Head switching time: 5us (maximum)

Write Pre-Compensation
----------------------
During writing, it is required that an advance or delay be applied to
MFM bits when they occur in certain patterns. This compensates for
peak shift on the disk due to pulse crowding. The value of compensa-
tion should be 10 to 12ns and be applied on cylinders 650 to 871.













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