Rodime RO-3055 HARD DISK DRIVE REPAIR, Rodime RO-3055 HARD DISK DRIVE SPECIFICATIONS,
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Rodime RO-3055 Hard Disk Drive Repair, Rodime RO-3055 Hard Disk Drive Specifications, Rodime RO-3055 Rodime RO-3055
Specifications



rodime ro-3055 picture.
rodime ro-3055 picture.
rodime ro-3055 picture.

Rodime RO-3055 Specifications
Model Capacity Size Height Bus Type Int.Type
Rodime RO-3055 46MB 3.5" HHT MFM ST506

                                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/HH               Cylinders     872|     |     |
Capacity form/unform    46/   55 MB        Heads           6|     |     |
Seek time   / track  28.0/ 8.0 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               

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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
  +---------------------------------------------------------+


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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


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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.


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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
 minimizing 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 illegal 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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