M 6 1 2 8    MINISCRIBE

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                                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders    1024|     |     |
Capacity form/unform   110/  128 MB        Heads           8|     |     |
Seek time   / track  28.0/ 6.0 ms          Sector/track   26|     |     |
Controller           RLL / ST506           Precompensation   512
Cache/Buffer               KB              Landing Zone
Data transfer rate    0.938 MB/S int       Bytes/Sector      512
                      0.938 MB/S ext
Recording method     RLL                            operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C        10 45    |    -40 60
Power: sleep              W     Humidity     %         8 80    |      8 80
       standby            W     Altitude    km    -0.061  3.048|        12.192
       idle               W     Shock        g         2       |     35
       seek          26.1 W     Rotation   RPM      3600
       read/write    14.1 W     Acoustic   dBA        45
       spin-up            W     ECC        Bit
                                MTBF         h      25000
                                Warranty Month
Lift/Lock/Park     YES          Certificates     CSA,FCC,IEC380,TUV,UL478,VDE 

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MINISC.  6032/6053/6079/6085/6128  PRODUCT MANUAL P/N 1011 REV. G

  +---------------------------------------------------------+
  |                                                         |XX
  |                                                         |XX J2
  |                                                         |XX
  |                                                         |X1
  |                                                         |
  |                                                         |
  |                                                         |
  |                                                SEL +--+4|XX
  |                                   Terminator       |  |3|XX J1
  |                                  14---------8      |  |2|XX
  |                                   |         |      +--+1|XX
  |                                   1---------7           |XX
  |                         +--+        RP20                |XX
  |                       J9+--+                            |X1
  |                                                         |
  |                                                         |X1 Power
  |                                                         |XX J3
  +---------------------------------------------------------+



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MINISC.  6032/6053/6079/6085/6128  PRODUCT MANUAL P/N 1011 REV. G

 Jumper setting
 ==============

 SEL  Drive Select
 -----------------
 As shipped, the jumper is positioned for Drive Select 1 (pins 1 to 8
 shorted).

       +------+                  +------+
       | xxxx | Drive ID 1       | 1  8 | Drive ID 2
       | 2  7 |                  | xxxx |
       | 3  6 |                  | 3  6 |
       | 4  5 |                  | 4  5 |
       +------+                  +------+


       +------+                  +------+
       | 1  8 | Drive ID 3       | 1  8 | Drive ID 4
       | 2  7 |                  | 2  7 |
       | xxxx |                  | 3  6 |
       | 4  5 |                  | xxxx |
       +------+                  +------+


 J9  Drive Exercise Option
 -------------------------
 As shipped, the Exerciser Mode jumper J9 is open for normal
 operation. When J9 is shorted with a jumper, the drive will be
 offline to the system and enter a seek exercise routione.

      OPEN     Normal Operation
      CLOSED   Seek Exercise

 The microprocessor performs a series of "wake up" diagnostics upon
 application of power. If an error is detected, the microprocessor
 will flash an error code by blinking the activity LED. Some errors
 may not allow the drive to return to the program until power is
 cycled.

 If no errors are detected, the microprocessor checks the configura-
 tion of the diagnostic Jumper J9. If installed, the drive enters a
 seek exercise routine. If removed (normal operation) the drive will
 remain in an idle state waiting for control signals. If an error is
 detected during the exercise routine an error code will be flashed by
 blinking the activity LED.

 Note: The drive select jumper can be used to initiate the J9 exer-
 cise.



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MINISC.  6032/6053/6079/6085/6128  PRODUCT MANUAL P/N 1011 REV. G

 Notes on installation
 =====================

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

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

 The drive may be mounted in any attitude except on its end and must
 not exceed an inclined pitch of five degrees.


 Mechanically isolated mounting points
 -------------------------------------
 Four side mounting and four base mounting points are provided to the
 customer. Each mounting point is mechanically isolated from the
 drive. Additionally, four side mounting points are provided which are
 compatible with a full height floppy disk drive.


 Mounting Configuration
 ----------------------
 The Miniscribe 6000 series of full height drives are designed to be
 used in applications where the unit may experience shock and
 vibration at greater levels than larger and heavier disk drives.

 The drive is mounted using 6-32 screws, 1/4 inch maximum penetration.
 The customer should allow adequate ventilation to prevent the drive
 from exceeding the specified operating environmental temperature.
 Excessive operating temperature will reduce MTBF and specified data
 reliability.


 Cabling
 -------
 Attach interface cables in the following order: P4, P1, P2, P3, with
 Connectors to J4, J1, J2 and J3 respectively. If multiple drives are
 to be interconnected, remove the terminator packs in all but the
 last drive of the daisy chain.


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

       HOST
   +-----------+                                +-----------------+
   |           +---o---Control------------------+P1     Drive 1   |
   |           |   |    +-------Data------------+P2               |
   |           |   |    |             +-Power---+P3  P4    ...    |
   |           |   |    |             |         +-----+-----------+
   |           |   |    |             |    +-Frame----+
   |           |   |    |             |    |    +-----------------+
   |Controller |   o----+-------------+----+----+P1     Drive 2   |
   |           |   |    | +-----------+----+----+P2               |
   |           |   |    | |           o----+----+P3  P4    ...    |
   |           |   |    | |           |    |    +----+------------+
   |           |   |    | |           |    o---------+
   |           |   |    | |           |    |    +-----------------+
   +-----------+   o----+-+-----------+----+----+P1     Drive 3   |
   |           |   |    | | +---------+----+----+P2               |
   |           +---+----+ | |         o----+----+P3  P4    ...    |
   |           +---+------+ |         |    |    +-----+-----------+
   |           |   |        |         |    o----------+
   |Data       +---+--------+         |    |    +-----------------+
   |Separator  |   +------------------+----+----+P1     Drive 4   |
   |           +----------------------+----+----+P2               |
   |           |                      o----+----+P3  P4    XXX    |
   +-----------+                      |    |    +-----+-----------+
                       DC voltages----+    o----------+
                                           |
                       Frame Ground--------+


 ... = Terminator Pack removed

 XXX = Terminator Pack installed


 Terminators
 -----------
 Each drive is shipped with a terminator pack RP 20 to provide the
 220/330 ohm termination for the Controller Input Signals. If multiple
 drives are configured in a daisy chain configuration, the terminator
 pack must be removed from all except the last unit on the daisy
 chain.


 P1 Control Signal Connector
 ---------------------------
 Connection to P1 is through a 34 pin PCB edge connector. The pins are
 numbered 1 through 34 with the odd pins located on the component side
 of the Printed Circuit Board. A key slot is provided between pins 4
 and 6.

 The recommended mating connector (J1) is AMP Ribbon Connector, P/N
 88373-3.


 P2 Data Signals Connector
 -------------------------
 Connection to P2 is through a 20 pin edge connector. The pins are
 numbered 1 through 20 with the odd pins located on the component side
 of the Printed Circuit Board. A key slot is provided between pins 4
 and 6.

 The recommended mating connector (J2) is AMP Ribbon Connector,
 P/N 88373-6.


 P3 DC Power Connector
 ---------------------
 DC power connector (P3) is a 4 pin AMP Mate-N-Lock Connector, mounted
 on the PCB.

 The recommended mating connector (J3) is AMP P/N 1-480424-0 utilizing
 AMP pins P/N 350078-4.

 Suggested wire size: 18 AWG

       +------------+    1 = +12 Volts DC
       | 4  3  2  1 |    2 = +12 Volts Ground Return
       +------------+    3 = + 5 Volts Ground Return
                         4 = + 5 Volts DC


 P4 Frame Ground Connector
 -------------------------
 Fasten AMP P/N 61761-2.

 The recommended mating connector is AMP P/N 62187-1.

 If used, the hole in P4 will accommodate a wire size of 18 AWG max.


 Electrical Interface
 --------------------
 The interface to any MiniScribe 6000 can be divided into three
 sections, each of which is physically separated: Control Signals,
 Data Signals and DC Power.

 All control Signals are digital in nature (open collector TTL), and
 either provide signals to the drive (input) or signals to the
 collector (output). The Data Signals are differential in nature and
 provide data either to (write) or from (read) the drive.

 The interconnecting cables between the drive and controller may be
 flat ribbon or twisted pairs of a length not to exceed 20 feet. The
 signal  return lines and ground lines for P1 and P2 should be
 grounded at the controller.

 The voltage return lines of P3 should only be grounded at the power
 supply.

 Connector P4 is a spade lug connector tied to frame ground.



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                      F   E   A   T   U   R   E  S
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MINISC.  6032/6053/6079/6085/6128  PRODUCT MANUAL P/N 1011 REV. G

 Introduction
 ------------
 The Miniscribe 6000 series of disk drives are full height random
 access storage devices of 32, 53, and 85 megabytes (MFM Mode), 79 and
 128 megabytes (RLL mode) (unformatted capacities). The drives contain
 up to five oxide 5 1/4 inch disks and utilize Whitney Style flexure
 technology. With one disk surface dedicated to continuous servo data,
 each other surface employs a movable head to service the data tracks.

 High performance and high unit reliability are achieved by the utili-
 zation of microprocessor control, a linear voice coil, and a closed
 loop servo positioning system. The heads, disks, and actuator
 assemblies are within a sealed enclosure containing a recirculating
 and breather filter to supply clean air and equalized pressure to the
 head and disk environment. Quality mechanical construction with a
 sophisticated single printed circuit board allows for maintenance
 free operation throughout the life of the drive.

 The 6000 series uses the industry standard ST506/412 interface. The
 6032, 6053, and 6085 MFM models have a 5 megabit per second transfer
 rate. The 6079 and 6128 RLL models utilize the 7.5 megabit per
 second data transfer rate. The drives also feature power up
 diagnostics, buffered seek, a brushless DC spin motor, dedicated
 shipping zone and automatic locking actuator.


 Seek time
 ---------
 (Including settling time)   |   6000    |
 ----------------------------+-----------+
 Single Track                |   6 ms    |
 Average                     |  28 ms    |
 Maximum                     |  55 ms    |
 Average Latency             |   8.33 ms |
 ----------------------------+-----------+

 Start time (max)  20 seconds from power on to   -READY
 Stop time  (max)  10 seconds from power removal


 Reliability and Maintenance
 ---------------------------
 MTBF                     25,000 POH (At 25*C Operating Environment)
 MTTR                     30 minutes
 Preventive Maintenance   None required
 Component Design Life    5 years


 Media Defects
 -------------
 Media defects are physical characteristics of the recording media
 resulting in repetitive read errors when a functional drive is
 operated within its specified operating conditions.

 A single defect is defined as beeing less than two bytes in length. A
 multiple defect is defined as up to three contiguous single defects.

 During the manufacture/test process, a certification test, consisting
 of a media verification, evaluates each drive and identifies the
 location of each media defect. These defects are labeled on the
 drives flaw map by head and cylinder address, and number of bytes
 from index.

 Media defects as shipped from MiniScribe:

                                6032  6053  6085  6079  6128
 Maximum defects per drive:      32    53    85    79    128
 Maximum defects per surface:    20    20    20    20    20

 These defects may be a combination of single or multiple type
 defects.

 Cylinder zero shall be error free.


 Magnetic Field
 --------------
 The externally induced magnetic flux density may not exceed 3 Gauss
 at the disk surface.


 Drive Mechanism
 ---------------
 A brushless DC direct drive motor rotates the spindle a 3600 rpm.
 The motor/spindle assembly is dynamically balanced to provide minimal
 mechanical runout to the disks. A dynamic brake is used to provide a
 fast stop to the spindle motor when power is removed.


 Air Filtration System
 ---------------------
 Within the sealed enclosure, a 0.3 micron filter along with a
 breather filter provides a clean, equalized pressure environment to
 the HDA for the life of the drive.


 Head Positioning System
 -----------------------
 The Read/Write and servo data heads are mounted on a ball bearing
 supported linear carriage, positioned by a linear voice coil motor,
 and driven by a closed loop servo system. This design allows for an
 increase in the number of data tracks. Position reference is made to
 tracks recorded on the dedicated servo surface located on the bottom
 side of the bottom disk.


 Track Zero Detection
 --------------------
 Track Zero detection utilizes data encoded at the factory on the
 servo disk, which is read by the servo head. The servo disk is the
 bottom surface of the disk closest to the printed circuit board
 (PCB).


 Automatic carriage retract and locking
 --------------------------------------
 When power is removed from the drive, the carriage will automatically
 retract and be latched in a non data area located at the inner most
 portion of the disk.


 Driver/Receiver charateristics
 ------------------------------
 Low state   (true):  0.0 to 0.4 VDC, -40ma max.
 High state (false):  2.5 to 5.25 VDC, 250 a


 Write Precompensation
 ---------------------
 In recording, to optimize data integrity and meet the error rate
 specification, write data presented to the controller may need to be
 precompensated from cylinder 512 and up. The need for write pre-
 compensation may vary with controller manufacturers.