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Hard Drive: RODIME: RO3139TP 112MB 3.5"/HH SCSI2 SE

R O 3 1 3 9 T P    RODIME
NO MORE PRODUCED                                      Native|  Translation
Form                 3.5"/HH               Cylinders    1148|     |     |
Capacity form/unform   112/      MB        Heads            |     |     |
Seek time   / track  18.0/ 5.0 ms          Sector/track   42|     |     |
Controller           SCSI2 SINGLE-ENDED    Precompensation
Cache/Buffer            64 KB DUAL-PORTED  Landing Zone
Data transfer rate    1.250 MB/S int       Bytes/Sector      512
                      5.000 MB/S ext SYNC
Recording method     RLL 2/7                        operating  | non-operating
Supply voltage     5/12 V       Temperature *C        10 50    |        60
Power: sleep              W     Humidity     %        10 85    |
       standby            W     Altitude    km    -0.305  3.048|
       idle           9.1 W     Shock        g        10       |
       seek               W     Rotation   RPM      3600
       read/write     9.5 W     Acoustic   dBA        50
       spin-up            W     ECC        Bit   48
                                MTBF         h      50000
                                Warranty Month
Lift/Lock/Park     YES          Certificates     CSA,FCC,IEC435,UL478,VDE



  |                                                       ++|XX
  |                                                       |||XX C
  |                                                   P4-+|||XX O
  |                                                    | |++|XX N
  |                                                    | |++|XX N
  |                                                    1-+|||XX E P6
  |                                                       |||XX C
  |                                                       ++|XX T
  |                                                       ++|XX O
  |                                                       |||XX R
  |                                                       |||XX
  |                                                       ++|XX
  |                                                         |XX
  |                                                         |
  |                                                         |XX Power
  |                                                         |XX P5



Jumper Setting

 P4  SCSI ID Selection
 | 1 3 5 7 9 |
 | 2 4 6 8 10|         +--------+-------+-------+-------+
 +-----------+         |Drive ID| 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|

 P4  Wait Spin Link
     7-8  CLOSED  Wait spin

When a jumper is connected across pins 7 and 8, the drive will not
power-up until receipt of the START/STOP command with the Start bit
set accordingly. For remote operation of this feature it is only
necessary to connect pin 8 to ground.
The state of this pin is only monitored on removal of the internal
reset to the drive after power has been applied to the drive.

 P4  Parity
     9-10 CLOSED  Enable parity

When a jumper is connected across pins 9 and 10, the drive will
enable parity checking. The use of this jumper excludes the enabling/
disabling of parity by the use of the MODE SELECT command. For remote
operation of this feature it is only necessary to connect pin 10 to



Notes on Installation

Drive Mounting and Installation
When installing the drive into an enclosure, the breather holes on
the drive top cover must not be obstructed. At least 0.1 inch
clearance must be provided between the top cover and the host frame.

There must be at least 0.1 inch clearance between the drive housing
and the host frame to ensure functional vibration isolation.

The drive may be mounted in any orientation and is supplied complete
with threaded mounting bracket. The drive is mounted using 6/32 UNC
screws with maximum engagement of 0.25 inch.

The drive installation must provide adequate air flow to ensure that
the maximum casting temperature of the head/disk assembly does not
exceed 60*C.

Physical Description
SCSI devices are daisy-chained together using a common cable. Both
ends of the cable are terminated. All signals are common between
SCSI devices.

The RO 3000TP uses single-ended drivers and receivers, which allow a
maximum cable length of six metres.

Cable Requirements
A 50-conductor flat cable or 25-signal twisted-pair cable shall be
used. The maximum cable length shall be 6.0 metres (19.7 ft).

A stub length of no more than 0.1 metres (3.94 in) is allowed off the
mainline interconnect within any connected equipment.

A minimum conductor size of 28 AWG shall be employed to minimize
noise effects and ensure proper distribution of optional terminator

Connector Requirements
The drive connector is a 50-conductor connector consisting of two
rows of 25 male pins with adjacent pins 2.54 mm (0.1 in) apart.

The cable connector shall be a 50-conductor connector consisting of
two rows of 25 female contacts with adjacent contacts 2.54 mm
(0.1 in) apart. The 3M P/N 3425-3000 cable connector is recommended.

The power connector is a 4 pin AMP Mate-N-Lock mounted on the end of
the PCB. The recommended mating connector is AMP P/N 1-480424-0 (or
equivalent) socket housing using AMP pin P/N 350078-4 (or

 Electrical Description
 All assigned signal are terminated with 220 ohms to +5V (nominal) and
 330 ohms to ground at each end of the cable. All signals use open-
 collector drivers. The terminators are removable.

Output Characteristics
Each signal driven by the RO 3000TP has the following output
characteristics when measured at the drive's connector:

     Signal assertion               = 0.0 volts dc to 0.4 volts dc.

     Minimum driver output capacity = 48 milliamps (sinking) at 0.5
                                      volts dc.

     Signal negation                = 2.5 volts dc to 5.25 volts dc.

Input Characteristics
Each signal received by the RO 3000TP shall have the following input
characteristics when measured at the drive's connector:

     Signal true                    = 0.0 volts dc to 0.8 volts dc.

     Maximum toatl input load       = -0.4 milliamp at 0.4 volts dc.

     Signal false                   = 2.0 volts dc to 5.25 volts dc.

     Minimum input hysteresis       = 0.2 volts dc.

Terminator Power (Optional)
The RO 3000TP is configured to supply terminator power, (TERMPWR),
with the following characteristics:

VTERM = 4.0 volts dc to 5.25 volts dc.

800 milliamps minimum source drive capability.

1.0 milliamp maximum sink capability.

Communication on the SCSI bus is allowed between only two SCSI
devices at any given time. There is a maximum of eight SCSI devices.

Sample SCSI Configurations

   +--------+        +-----+ Single Initiator, Single Target
   +--------+SCSI Bus+-----+

   +--------+SCSI    +-----+ Single Initiator, Multiple Target
   +--------+Bus  |  +-----+
                  |  +-----+

   +--------+SCSI Bus+-----+ Multiple Initiator, Multiple Target
   +--------+ |   |  +-----+
   +--------+ |   |  +-----+
   |Computer+-+   +--+DRIVE|
   +--------+     |  +-----+
                  |  +-----+
                  |  +-----+
                  |  +-----+
                  |  +-----+
   +--------+     |  +-----+
   +--------+        +-----+



General Description
The RO 3000TP series of disk drives are random access storage devices
which use three or five 95mm magnetic disks to provide formatted
capacities of 112MB (3139TP) and 210MB (3259TP). This drive has a
fixed physical format of 512 bytes per sector, with up to 42 sectors
per track.

A microprocessor is used to control various drive functions including
command execution, and head positioning.

The positioning of the data heads is accomplished using a rotary
voice-coil actuator with a dedicated servo surface plus embedded
servo data offering improved positioning accuracy at high track

The drive communicates with a host computer system via the Small
Computer System Interface (SCSI) bus.

The following features are supported:

 - 64K Bytes dual ported FIFO data buffer, configured as a
   intelligent cache
 - Will support a logical sector size of 512 bytes
 - Disconnected operations with arbitration for reselection
 - Command linking
 - ECC error detection and correction using 48 bit polynominal
 - Average data transfer rate of 1.25 MBytes/second
 - 1 : 1 interleave factor
 - Operation with arbitrating and non-arbitrating hosts
 - Extended SCSI command set
 - Diagnostics and error reporting
 - Hardware parity link option
 - Wait spin-up link option
 - Low power standby mode when data access not occurring
 - Frequency Locking with Hall-less DC motor
 - Buffer ratio disconnects supported

Defect Handling
Disc defects are handled by the RO 3000TP using a sector sparing
technique. During manufacture the drive is formatted using a format
control code of 1EH. After this format, the drive allows the
initiator access to all physical sectors. The drive is tested in this
mode and any defective sectors are entered into a list known as the
Primary Defect List or P-List. The P-List is stored along with the
G-LIST in sectors 2-5 and 18-21 of the special Maintenance Track.
This track is physically Cylinder -1, Head 0 and is NOT part of the
logical address space normally available to the user. The P-List can
only be altered or erased by reformatting the maintenance track
(Command E1H) or reformatting the entire drive (Command 04H) using
format control codes 1EH or 16H.

LED Error Codes
Under certain fault conditions, the following error codes will appear
on the SELECT LED on the front panel. A four bit binary code is used
(long flash = 1, short flash = 0) with the most significant bit
occuring first.

 HEX CODE  Definition
    01     The drive has detected that the spindle motor speed is out
           of tolerance ( 10%).
    06     After stepping the maximum number of cylinders, the drive
           could not achieve correct track zero status.
    07     The spindle motor did not start at power up.
    08     Spindle motor failed initial  1% speed check at power up.
    0A     No track crossing signal during a seek.
    0B     No servo data.
    0C     +12V supply failure.
    0D     Hardware Interrupt Error.

All the above error codes are designatd FATAL, and resetting of the
drive can only be accomplished by powering off, then on again.

If the drive has a FATAL error, it will switch off power to both the
voice coil and spindle motors and flash the fatal error code on the
SELECT LED on the front panel. The drive will still respond to
commands sent across the SCSI interface, but will not execute any of

 Access Time
 Single cylinder:        5 ms (max)
 Average cylinder seek: 18 ms (typ)
                        20 ms (max)
 All cylinders:         38 ms (typ)
                        42 ms (max)
 Head switch time:       4 ms

Average latency: 8.33ms (when accessing data not stored in the

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.

Data Transfer Rate
Disk Data Rate
Outer Zone - 12 MBits/sec
Inner Zone - 10 MBits/sec

SCSI Transfer Rate
Average - 1.25 Mbytes/sec
Maximum - 5 Mbytes/sec

Service Goals
No preventative maintenance is required and there are no adjustments
on the drive. The repairs that may be effected on-site are replace-
ment of the electronics board. The mean time to repair (MTTR) includ-
ing initial verification is 0.25 hours.

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