
1 9 9 1   W D         S C O R P I O   9    MICROPOLIS
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders    4356|     |     |
Capacity form/unform  9100/10741 MB        Heads          27|     |     |
Seek time   / track  12.0/ 2.0 ms          Sector/track     |     |     |
Controller           SCSI2 DI/WI/FAST      Precompensation
Cache/Buffer           512 KB SEGMENTED    Landing Zone
Data transfer rate          MB/S int       Bytes/Sector      512
                     20.000 MB/S ext SYNC
Recording method     RLL                            operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C        10 50    |    -40 65
Power: sleep              W     Humidity     %        10 90    |     10 90
       standby            W     Altitude    km    -0.061  3.048| -0.305 15.240
       idle          30.5 W     Shock        g         2       |     30
       seek          33.5 W     Rotation   RPM      5400
       read/write         W     Acoustic   dBA        40
       spin-up            W     ECC        Bit   126,REED SOLOMON
                                MTBF         h    1000000
                                Warranty Month
Lift/Lock/Park     YES          Certificates


**********************************************************************
                        L   A   Y   O   U   T
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MICROPL. 1991B  PRELIMINARY PRODUCT DESCRIPTION 110879 REV. 1 , 1994

  +---------------------------------------------------------+
  |                                                         |XX
  |  Component Side                                         |XX J2
  |  No. 140222                                             |XX
  |                                          W1+-W2         |1X
  |                                          W3+-+          |
  |                                                     +RN3|XX
  |                                                     ||  |XX
  |                                                     ||RN1XX
  |                                                     |||||XX
  |                                                     ++|||XX J1
  |                                                     ++|||XX
  |                                                     ||++|XX
  |                                                     ||  |XX
  |                                                     ||  |XX
  |  +-+J11                                             +RN2|  1
  |  +-+LED Connector             Frame Ground++W9          |XX J3
  |                                           ++            |XX
  +---------------------------------------------------------+  1






     +--------------------------------------+
     |         ++J4                         |
     |         ++                           |
     |    ++J5                              |
     |    ++                                |
     |                                      |
     |   J2             J1            J3    |
     +..........-XXXXXXXXXXXXXXXXXX-XXXXXXXX+
     +-Multi---1---Signal---------1--------1+
                                     Power



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                      J   U   M   P   E   R   S
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MICROPL. 1991B  PRELIMINARY PRODUCT DESCRIPTION 110879 REV. 1, 1994

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

 x = Factory default


 J2  Multi-Function Connector
 ----------------------------

 Spindle Control Option SPIN 0--+
 Spindle Delay Option SPIN 1-+  |  +------------ID3
 Write Protect Option-----+  |  |  |  +---------ID2
 Bus Parity Check Option+ |  |  |  |  |  +------ID1
 Remote LED---+         | |  |  |  |  |  |   +--ID0
          +--++-+--+--+-+++-++-++-++-++-++-+-++ +-----
          |23|21|19|17|15|13|11|09|07|05|03|01+-+
          |24|22|20|18|16|14|12|10|08|06|04|02+-+  J1
          ++-+-++-++-++--+--+--+--+--+--+--+--+ +-----
       +5V-+   |  |  |
 Remote LED +5V+  |  |
 Slave Sync Signal+  +Master Sync Signal (MS)


 Note: Pins 2, 4, 6, 8, 10, 12, 14 and 16 are tied to Ground.

 Pins: 17, 19, 23 are RESERVED.


 Multi-Function Connector J2 Pin Assignments
 -------------------------------------------
 +---+---------------+---+--------------+
 |Pin| Signal Name   |Pin|Signal Name   |
 +---+---------------+---+--------------+
 | 1 |ID0            | 2 |GROUND        |
 +---+---------------+---+--------------+
 | 3 |ID1            | 4 |GROUND        |
 +---+---------------+---+--------------+
 | 5 |ID2            | 6 |GROUND        |
 +---+---------------+---+--------------+
 | 7 |ID3            | 8 |GROUND        |
 +---+---------------+---+--------------+
 | 9 |SPIN0          |10 |GROUND        |
 +---+---------------+---+--------------+
 |11 |SPIN1          |12 |GROUND        |
 +---+---------------+---+--------------+
 |13 |WPROT          |14 |GROUND        |
 +---+---------------+---+--------------+
 |15 |PARITY         |16 |GROUND        |
 +---+---------------+---+--------------+
 |17 |RESERVED       |18 |MASTER SYNC MS|
 +---+---------------+---+--------------+
 |19 |RESERVED       |20 |SLAVE SYNC SS |
 +---+---------------+---+--------------+
 |21 |Remote LED     |22 |Remote LED +5V|
 +---+---------------+---+--------------+
 |23 |RESERVED       |24 |+5V           |
 +---+---------------+---+--------------+


 J2  SCSI ID
 -----------
 Up to sixtheen devices (the host and fifteen targets) can be attached
 to the SCSI bus. In multiple-device systems, each drive must have its
 own unique ID.

   +----------+-------------------------------+
   | SCSI ID  |       Jumper Location         |
   |          |             PINS              |
   |          |  ID3  |  ID2  |  ID1  |  ID0  |
   +----------+-------+-------+-------+-------+
   |    0     | OPEN  | OPEN  | OPEN  | OPEN  |
   |    1     | OPEN  | OPEN  | OPEN  | CLOSED|
   |    2     | OPEN  | OPEN  | CLOSED| OPEN  |
   |    3     | OPEN  | OPEN  | CLOSED| CLOSED|
   |    4     | OPEN  | CLOSED| OPEN  | OPEN  |
   |    5     | OPEN  | CLOSED| OPEN  | CLOSED|
   |    6     | OPEN  | CLOSED| CLOSED| OPEN  |
   |    7     | OPEN  | CLOSED| CLOSED| CLOSED|
   |    8     | CLOSED| OPEN  | OPEN  | OPEN  |
   |    9     | CLOSED| OPEN  | OPEN  | CLOSED|
   |   10     | CLOSED| OPEN  | CLOSED| OPEN  |
   |   11     | CLOSED| OPEN  | CLOSED| CLOSED|
   |   12     | CLOSED| CLOSED| OPEN  | OPEN  |
   |   13     | CLOSED| CLOSED| OPEN  | CLOSED|
   |   14     | CLOSED| CLOSED| CLOSED| OPEN  |
   | x 15     | CLOSED| CLOSED| CLOSED| CLOSED|
   +----------+-------+-------+-------+-------+


 SPIN0/SPIN1  Spindle Control Option
 -----------------------------------
 SPIN0 CLOSED
 SPIN1 OPEN   Spindle motor starts when START UNIT command is
              received.

 SPIN0 OPEN   (default)
 SPIN1 OPEN   Spindle motor starts at power-on.


 SPIN0/SPIN1  Spindle Delay Option
 ---------------------------------
 SPIN1 CLOSED
 SPIN0 OPEN   Spindle start-up is delayed based on SCSI ID (12 seconds
              per ID).

 SPIN1 OPEN   (default)
 SPIN0 OPEN   Spindle motor starts at power on.


 Spindle Synchronization
 -----------------------
 The Rotational Position Locking field (MODE SELECT command, Page Code
 04h) is used to specify spindle synchronization operation.

 Unsynchronized: If the drive is set to Unsynchronized (RPL = 00b), it
 ignores the SLAVE SYNC signal.

 Slave: If the drive is set to Slave (RPL = 01b), it does not generate
 the MASTER SYNC signal or the SLAVE SYNC signal but synchronizes its
 index to the SLAVE SYNC signal supplied by an external source.
 Signal termination is placed on the SLAVE SYNC signal at the first
 and last drive in the chain only.

 Master: If the drive is set to Master (RPL = 10b), it generates the
 SLAVE SYNC output signal for use directly by the slave drives.
 Signal termination is placed on the SLAVE SYNC signal at the first
 and last drive in the chain only.

 Master Control: If the drive is set to Master Control (RPL = 11b), it
 generates the MASTER SYNC signal. This output is used by the
 controller to generate the SLAVE SYNC signal for the slaves.
 Signal termination is placed on the MASTER SYNC signal at the first
 and last drive in the chain only. Signal termination is placed on
 the SLAVE SYNC signal at the first and last drive in the chain only.


 WPROT  Write Protect Option
 ---------------------------
 WPROT CLOSED  Drive is write protected.
 WPROT OPEN    Drive is not write protected. (default)


 PARITY  Bus Parity Check Option
 -------------------------------
 PARITY CLOSED  Drive neither generates nor detects parity.
        OPEN    Drive generates parity and has parity detection
                enabled. (default)


 RN1/RN2/RN3  Interface Termination
 ----------------------------------
 Terminators INSTALLED (default)
             Drive is terminated.

 Terminators OMITTED
             Drive is not terminated.



 W1/W2/W3  Bus Termination Power Option
 --------------------------------------
   +---+   +---W2  +---+
  W1xxx|   |o X|   |o o|
   |o o|   |o X|   |xxxW3
   +---+   +---+   +---+

 W1  CLOSED (default)
     Drive provides terminator power.

 W2  CLOSED
     Host system provides terminator power.

 W3  CLOSED
     Drive provides terminator power to the BUS.


 W9  Frame Ground Option
 -----------------------
 W9  CLOSED
     Frame ground is connected to logic ground.

 W9  OMITTED
     Frame ground is not connected to logic ground.(default)



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                      I   N   S   T   A   L   L
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MICROPL. 1991B  PRELIMINIARY PRODUCT DESCRIPTION 110879 REV. 1, 1994

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

 Recommended mounting orientation
 --------------------------------

            horizontally             vertically
         +-----------------+   +--+             +--+
         |                 |   |  +-----+ +-----+  |
         |                 |   |  |     | |     |  |
       +-+-----------------+-+ |  |     | |     |  |
       +---------------------+ |  |     | |     |  |
                               |  |     | |     |  |
                               |  |     | |     |  |
                               |  +-----+ +-----+  |
                               +--+             +--+

 Dimensions and Mounting
 -----------------------
 The drive uses industry-standard mounting techniques for 5 -inch
 full-height Winchester disk drives.

 The drive is designed such that the outer frame should be hard-
 mounted to the host equipment; no additional/external shock mounts
 should be used.

 Recommended orientation is vertical on either side, or horizontal
 with the Device Electronics board down; other mounting orientations
 may be used.

 No matter what mounting orientation is used, Micropolis specifies
 that the maximum HDA casting temperature not exceed 60*C (140*F).


 Mounting Screws
 ---------------
 2 per side 6-32 UNC-2B
 4 on bottom 6-32 UNC-2B

 Caution: The mounting screws must be selected so that they do not
 penetrate the bottom mounting holes by more than 0.20 inches or the
 side mounting holes by more than 0.156 inches. Screws that are too
 long may short to PCBA components.


 Single-Ended Interface Electrical Characteristics
 -------------------------------------------------
 Interface control and status signals are digital (open collector TTL)
 using industry-standard transmitters and receivers which provide
 a terminated system.

 The assigned signals are terminated with 220 ohms to +2.85V
 (nominal). All signals use open-collector or three-state drivers.

 For active termination, the assigned signals are terminated with 110
 ohms to +2.85V (nominal). For passive termination, the signals are
 terminated with 220 ohms to +5V (nominal) and 330 ohms to ground. All
 signals use open-collector or tri-state drivers.

 Single-ended drivers and receivers allow a maximum cable length of
 six meters (primarily for connection within a cabinet).
 Signal transmission requires a single 68-conductor (flat or twisted
 pair) cable. A characteristic impedance of 100 ( 10%) ohms is
 recommended.

   a. Input Characteristics

      Each of the drive's signal receivers has the following
      characteristics when measured at the interface connector.

      1) Low-level input voltage (Signal true) = 0.0 VDC to 0.8 VDC

      2) High-level input voltage (Signal false) = 2.0 VDC to 5.25 VDC

      3) Low-level input current = -0.4 milliamps at 0.5 VDC

      4) High-level input current = 0.1 milliamps at 2.7 VDC

      5) Minimum input hysteresis = 0.2 VDC

      6) Maximum input capacitance = 25 pF

   b. Output Characteristics

      Each of the drive's signal drivers has the following
      characteristics when measured at the interface connector.

      1) Low-level input coltage (Signal assertion) = 0.0 VDC to 0.5
                                                      VDC
      2) High-level input voltage (Signal negation) = 2.5 VDC to 5.25
                                                      VDC
      3) Minimum driver output capability = 48 milliamps (sinking) at
                                            0.5 VDC.

   c. Terminator Power (TERMPWR at Pins 33,34,35, and 36)

      Terminator Power has the following requirements:

      V(TERM) = 4.25 VDC to 5.25 VDC

      1500 milliamps minimum source drive capability, with 2.0 amp
      recommended current limiting (e.g., a fuse).

      The drive will have a terminator power bus load of 1.0-milliamp,
      maximum (except for the purposes of providing power to an
      internal terminator).

 The drive provides keyed connectors to prevent accidental grounding
 or misconnection of terminator power.


 Signal Connector J1
 -------------------
 J1 is a 68-pin interface connector. The signals on J1 include the
 16-bit SCSI bus and various control and handshaking lines.

 Recommended Cable:    AMP P/N 2-57013-1 or equivalent
 Mating connector:     AMP P/N 786090-7 or equivalent


 J2 Multi-Function Connector/Jumper Block
 ----------------------------------------
 J2 is a 24-pin, multi-function connector/jumper block. This
 connector is used for device addressing and various other options.


 J3  DC Power Connector
 ----------------------
 J3 is a 4-pin connector used to supply +5V and +12V to the drive.

    Mating Connector:   AMP 1-480424-0 or equivalent
                Pins:   AMP 350078-4
 Suggested Wire Size:   18 AWG

 Pin 1  +12V
 Pin 2  +12 Return
 Pin 3  + 5 Return
 Pin 4  + 5V


 Ground Connectors J4 and J5
 ---------------------------
 3/16-inch spade lugs J4 and J5 are provided for grounding. Systems
 characteristics determine proper ground connection.

 Mating connector: AMP 60972-2 or equivalent.


 Multiple-Drive Systems
 ----------------------
                                             Drive #1
  +------HOST------+                 +-----------------+
  | +-----------+  +--+-SCSI-BUS-----+ J1              |
  | |Terminators|  |  |       +------+ J3   J4/J5      |
  | +-----------+  |  |       |      +--------+--------+
  |                |  |       |               +------------------+
  +----------------+  |       |              Drive #2            |
                      |       |      +-----------------+         |
                      +-------+------+ J1              |         |
                      |       o------+ J3   J4/J5      |         |
                      |       |      +--------+--------+         |
                      |       |               +------------------+
                      |       |              Drive #3            |
                      |       |      +-----------------+         |
                      +-------+------+ J1              |         |
                      |       o------+ J3   J4/J5      |         |
                      |       |      +--------+--------+         |
                      |       |               +------------------+
                      |       |              Drive #4            |
                      |       |      +--------------+--+         |
                      +-------+------+ J1           |T |         |
                              o------+ J3   J4/J5   +--+         |
           --DC-Voltages------+      +--------+--------+         |
           ---GROUND--------------------------+------------------+

 T = TERMINATORS

 Terminators are installed ONLY in the last physical drive in the
 control chain.

 Connectors J4 and J5 are provided for grounding; system character-
 istics determine the proper ground connection.


 Adjustments and Maintenance
 ---------------------------
 The drives requires no adjustments or periodic maintenance;
 additionally, no mechanical adjustments are required to prepare a
 system for handling or shipment.


 Field-Replacable Components
 ---------------------------
 The concept of repair by replacement of complete functional
 components is utilized in the drive, resulting in an MTTR of less
 than 15 minutes.


 Temperature Measurements
 ------------------------
 Micropolis specifies the maximum HDA casting temperature to be 60*C
 (140*F). Not exceeding this temperature will ensure that the
 head-to-media interface never exceeds its temperature limit.

 If the HDA casting temperature measurement cannot be made, the
 ambient air temperature around the drive must be kept at or below
 50*C (122*F).



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                      F   E   A   T   U   R   E  S
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MICROPL. 1991B  PRELIMINARY PRODUCT DESCRIPTION 110879 REV. 1, 1994


 Description
 -----------
 This Product Description describes the Micropolis model 1991B
 (16-bit, wide, single-ended) Rigid Disk Drive. This drive model is a
 member of the Micropolis SCORPIO family of high-performance, 5 -inch,
 full-height Disk Drives.

 These drive provides OEMs with random-access, high-speed, data
 storage and meet the needs of diverse applications environments.
 The drive is ideal for high-capacity database environments and
 graphics, audio/video, and multi-media applications where very high
 capacity, low cost-per-megabyte storage is required. The drive is
 compatible with the "ANSI CCS" version and the "SCSI-2" version of
 the industry-standard Small Computer System Interface (SCSI)
 specification.


 DIFFERENTIAL INTERFACE IS OPTIONAL.


 Some Features of the Drive
 --------------------------
 - Positive media protection is achieved during spin down (due to a
   STOP UNIT command or power off) by automatically retracting and
   locking the positioner in a data-free landing zone.

 - N-Segment Read-Ahead algorithm improves read performance by
   allowing many accesses to be serviced from the cache buffer (512K
   or optional 2MB).

 - Optional, Write-Behind Caching provides dramatic improvement in
   write performance by appending multiple write commands per disk
   revolution.

 - In-Line Defect Management (sector slipping) provides maximum
   throughput.

 - Data Integrity is ensured with CRC through the buffer, 126-bit
   Reed-Solomon ECC on-the-fly, and automatic retries using servo and
   data strobe offsets.


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

 At the time of manufacture, a media test system evaluates every
 drive and identifies each media defect location. The defective
 areas are identified by head address (HD), cylinder address (CYL),
 and number of bytes from Index (BFI).

 The list of manufacturer-found defects is stored on the drive in a
 reserved, write-protected area accessible by the SCSI controller.
 This list is known as the MDL (Manufacturers Defect List) or PList
 (Primary Defect List). A printed listing of the defects is also
 shipped with each drive. The entries it contains can be mapped out
 (reassigned) automatically at format control parameter bits.


 Seek Time
 ---------

                                          | 1991B  |
        ----------------------------------+--------+
        Track-to-Track  read   msec. typ. |   1.4  |
                        write  msec. typ. |   2.4  |
                       Average msec. typ. |  12    |
                               msec. max. |  28    |
        Latency                msec. avg. |   5.56 |
        ----------------------------------+--------+


 Recording Media
 ---------------
 Aluminium disks, each 130 millimeters (5 -inches) in diameter, are
 mounted on the spindle assembly. The recording surface on each disk
 is a thin coating of magnetic material.


 Air Filtration System
 ---------------------
 The drives are designed to provide contamination control within the
 HDA throughout the life of the drive with zero maintenance.

 Air within the HDA is continuously recirculated and filtered through
 a high efficiency filter. Air is ducted to and from the filter for
 maximum pressure recovery and filter efficiency. Air within the HDA
 may only enter the drive through a high-efficiency breather filter.


 Braking
 -------
 The heads contact a start/stop (landing zone) area of the disk
 surface which is not used for data storage when the disk are not
 spinning and during start and stop cycles. Dynamic braking is used to
 stop the spindle quickly.


 Frame (Outer Chassis)
 ---------------------
 The HDA is suspended within the outer frame on shock isolators/
 absorbers. This method of construction protects the HDA from
 mounting-related disortion or stress, and shock and vibration. The
 drive is designed such that the outer frame should be hard-mounted to
 the host equipment; no additional/external shock mounts should be
 used.


