
1 9 3 6   A V    MICROPOLIS
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders    2759|     |     |
Capacity form/unform  3022/ 3571 MB        Heads          21|     |     |
Seek time   / track  12.0/ 1.8 ms          Sector/track     |     |     |
Controller           SCSI2 SI/FAST         Precompensation
Cache/Buffer           256 KB WRITE/PARITY Landing Zone
Data transfer rate          MB/S int       Bytes/Sector      512
                     10.000 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               W     Shock        g         2       |     40
       seek          31.0 W     Rotation   RPM      5400
       read/write         W     Acoustic   dBA        41
       spin-up            W     ECC        Bit
                                MTBF         h     250000
                                Warranty Month        60
Lift/Lock/Park     YES          Certificates                                  

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                        L   A   Y   O   U   T
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MICROPL. 1936S/D  PRODUCT DESCRIPTION 110827 REV. A

  +---------------------------------------------------------+
  |                                                    ++++ |XX
  | COMPONENT SIDE                                    W9++W8|XX ID2
  |                                          Terminator     |XX ID1
  |                                          +---RN4------+ |X1 ID0
  |                             +-+-+-+      +------------+ |
  |                             |.|.|.|                     |XX
  |                             |.|.|.|                W12+ |XX J1
  |                             |.|.|.|                  ++ |XX
  |                             |.|.|.|                 W1+ |XX
  |                             |.|.|.|                 W2| |XX
  |                             |.|.|.|                  ++ |XX
  |                             +++++++      Terminator     |XX
  |                            RN1 | +RN3    +---RN5------+ |XX
  |                                RN2       +------------+ |X1
  |                                                         |
  |                                                   +W11  |XX J3
  |                                                   ++    |XX Power
  +---------------------------------------------------------+  1






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



**********************************************************************
                      J   U   M   P   E   R   S
**********************************************************************
MICROPL. 1936S/D  PRODUCT DESCRIPTION 110827 REV. A

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

 x = Jumpers setting at factory


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


 Bus Parity Check Option-----+     +---------Spindle Control Option
                             |     |  +------ID2
   Write Protect Option---+  |     |  |  +---ID1
                          |  |     |  |  |   ID0
          +--+--+--+--+--++-++-+--++-++-++-+-++ +-----
          |  |  |  |  |  |13|11|  |07|05|03|01+-+
          |  |  |  |18|16|14|12|  |08|06|04|02+-+  J1
          +--+--+--++-++-+--+--+--+--+--+--+--+ +------
         Slave Sync-+  Master
                       Sync

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

 Multi-Function Connector J2 Pin Assignments
 -------------------------------------------
 +---+-------------+----------------+---+------------+---------------+
 |Pin| Signal Name |Description     |Pin|Signal Name |Description    |
 +---+-------------+----------------+---+------------+---------------+
 | 1 |ID0          |SCSI ID 0       | 2 |GROUND      |    -          |
 +---+-------------+----------------+---+------------+---------------+
 | 3 |ID1          |SCSI ID 1       | 4 |GROUND      |    -          |
 +---+-------------+----------------+---+------------+---------------+
 | 5 |ID2          |SCSI ID 2       | 6 |GROUND      |    -          |
 +---+-------------+----------------+---+------------+---------------+
 | 7 |SPIN0        |Spindle Control | 8 |GROUND      |    -          |
 +---+-------------+----------------+---+------------+---------------+
 | 9 |Reserved     |-               |10 |GROUND      |    -          |
 +---+-------------+----------------+---+------------+---------------+
 |11 |PARITY       |Bus Parity Check|12 |GROUND      |    -          |
 +---+-------------+----------------+---+------------+---------------+
 |13 |WPROT        |Write Protect   |14 |GROUND      |    -          |
 +---+-------------+----------------+---+------------+---------------+
 |15 |Not Connected|                |16 |MASTER SYNC |Master Spindle |
 |   |             |                |   |            |Synchronization|
 +---+-------------+----------------+---+------------+---------------+
 |17 |Not Connected|                |18 |SLAVE SYNC  |Slave Spindle  |
 |   |             |                |   |            |Synchronization|
 +---+-------------+----------------+---+------------+---------------+
 |19 |Not Connected|                |20 |Not         |               |
 |   |             |                |   |Connected   |               |
 +---+-------------+----------------+---+------------+---------------+
 |21 |SELECT_LED   |Select LED      |22 |Reserved    |               |
 +---+-------------+----------------+---+------------+---------------+
 |23 |+5V          |+5V Source      |24 |SELECT-5V   |+5V for Select |
 |   |             |                |   |            | LED           |
 +---+-------------+----------------+---+------------+---------------+


 J2  SCSI ID
 -----------
   +----------+-----------------------+
   | SCSI ID  |        Jumpers        |
   |          | ID2   | ID1   | ID0   |
   +----------+-------+-------+-------+
   |x   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|
   +----------+-------+-------+-------+

 Up to eight devices (the host and seven targets) can be attached to
 the SCSI bus. The 1936 drive has three ID jumpers. These three
 jumpers are used to assign one of the eigth SCSI ID bits (0 through
 7) to the drive.

 SCSI ID = 0; factory default configuration.

 In multiple-device systems, each drive must have its own unique ID
 bit.


 J2  Spindle Control Option
 --------------------------
     Pin 7-8 CLOSED  The drive must wait for an interface START UNIT
                     command to start the spindle motor.
             OPEN    The drive automatically starts the spindle motor
                     at power-on. (Factory default configuration)


 J2  Bus Parity Check Option
 ---------------------------
     Pin 11-12 CLOSED  The drive neither generates nor detects parity.
               OPEN    The drive generates parity and enables parity
                       detection.

 J2  Write Protect Option
 ------------------------
     Pin 13-14 CLOSED  The drive is write protected. CAUTION: The
                       drive can still be formatted.
               OPEN    The drive is not write protected. (Factory
                       default configuration)




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


 W1/W2/W12  Bus Termination Power Option
 ---------------------------------------

   +-----------------------+------------------------------------+
   |        Jumpers        |                                    |
   |  W1   |  W2   |  W12  |                                    |
   +-------+-------+-------+------------------------------------+
   | CLOSED| OPEN  | OPEN  |The drive provides terminator power |
   |       |       |       |to its on-board terminators         |
   |       |       |       |(Factory default configuration)     |
   +-------+-------+-------+------------------------------------+
   | OPEN  | CLOSED| OPEN  |Terminator power is provided by the |
   |       |       |       |host via interface cable J1, pin 26 |
   +-------+-------+-------+------------------------------------+
   | OPEN  | CLOSED| CLOSED|The drive provides terminator power |
   |       |       |       |to its on-board terminators and     |
   |       |       |       |also to the SCSI bus via interface  |
   |       |       |       |cable J1, pin 26 (TERMPWR)          |
   +-------+-------+-------+------------------------------------+

 A jumper is installed at W1, at W2, or at W2 and W12 to select the
 source of terminator power (+5V) for the SCSI bus terminator packs on
 the Device Electronics board.

 Do not install jumpers at both W1 and W12.


 W8/9  Spindle Synchronization Option
 ------------------------------------
 Jumpers installed (CLOSED) at W8 and W9 provide termination for the
 Spindle Synchronization signals (Slace Sync and Master Sync respect-
 ively).

 When the Spindle Synchronization option is to be implemented, the
 jumpers are removed from all drives except the last drive on the
 cable.

 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 (J2, pin 18) supplied by an external
 source.

 Master: If the drive is set to Master (RPL = 10b), it generates the
 SLAVE SYNC output signal (J2, pin 18) for use directly by the slave
 drives.

 Master Control: If the drive is set to Master Control (RPL = 11b), it
 generates the MASTER SYNC signal (J2, pin 16). This output is used by
 the controller to generate the SLAVE SYNC signal (J2, pin 18) for the
 slaves.


 W11  Frame Ground Option
 ------------------------
      W11  CLOSED  Frame ground is connected to logic ground
           OPEN    Frame ground is not connected to logic ground
                   (Factory default configuration)


 J3   DC Power and pin connector assignments
 -------------------------------------------
      +------------+   pin 1    +12 V
      | 1  2  3  4 |   pin 2    +12 V Return
      +------------+   pin 3    + 5 V Return
                       pin 4    + 5 V



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                      I   N   S   T   A   L   L
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MICROPL. 1936S/D  PRODUCT DESCRIPTION 110827 REV. A

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

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

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


 Dimensions and Mounting
 -----------------------
 The 1936 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 provided the ambient air temperature around the drive is
 kept at or below 50*C (122*F).

 The term "ambient" becomes imprecise when referencing a drive in a
 system, since it is difficult to determine where the air temperature
 should be measured. To help resolve this confusion, Micropolis
 specifies that the maximum HDA casting temperature (regardless of the
 air temperature around the drive) is 60*C (140*F). Not exceeding this
 temperature will ensure that the head-to-media interface never exceed
 its temperature limit.


 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 will short to PCBA components and/or prevent operation of the
 shock mount system.


 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, single-ended system.

 The assigned signals are terminated with 220 ohms to +5V (nominal)
 and 330 ohms to ground at each end of the cable. All signals use
 open-collector or three-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 50-conductor cable. A
 characteristic impedance of 100 ( 10%) ohms is recommended for un-
 shielded flat or twisted pair ribbon cable.

   a. Input Characteristics

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

      1)  Signal true = 0.0 VDC to 0.8 VDC
      2)  Maximum total input load = -0.4 milliamps at 0.5 VDC
      3)  Signal false = 2.0 VDC to 5.25 VDC
      4)  Minimum input hysteresis = 0.2 VDC

   b. Output Characteristics

      Each driven signal has the following characteristics when
      measured at the interface connector.

      1)  Signal assertion = 0.0 VDC to 0.5 VDC
      2)  Minimum driver output capability = 48 milliamps (sinking) at
                                             0.5 VDC.
      3)  Signal negation = 2.5 VDC to 5.25 VDC

   c. Terminator Power (TERMPWR at Pin 26)

      Terminator Power has the following requirements:

      V(TERM) = 4.25 VDC to 5.25 VDC

      800 milliamps minimum source drive capability, with 1.0 amp
      recommended current limiting (e.g., a fuse).

      1.0-milliamp maximum bus loading (except for the purposes of
      providing power to an internal terminator).

 Keyed connectors are provided to prevent accidental grounding or
 misconnection of terminator power.

 Interface Terminator packs provides proper termination for the
 single-ended interface lines. For a multiple-drive system, the
 terminator pack is installed in the last drive on the cable.


 DIFFERENTIAL Interface Electrical Characteristics
 -------------------------------------------------
 Differential interface signals consist of two signal lines which are
 denoted +SIGNAL and -SIGNAL.

 A signal is defined as true when the +SIGNAL is more positive than
 the -SIGNAL.
 A signal is defined as false when the -SIGNAL is more positive than
 the +SIGNAL.

 Differential drivers and receivers allow a maximum cable length of
 25 meters.

 Signal transmission requires a single 50-conductor cable. A
 characteristic impedance of 100 ( 10%) ohms is recommended for un-
 shielded flat or twisted pair ribbon cable.

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

 A stub length of no more than 0.2 meters is allowed off the main-line
 interconnection within any connected equipment.

   a. Input Characteristics

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

      I (input current on either input) =   2.0 milliamps, maximum
      Note: These characteristics include both receivers and passive
      drivers.

      This requirement is met with the input voltage varying between
      -7V and +12V, with power either on or off, and with hysteresis
       equaling 35 millivolts, minimum.

   b. Output Characteristics

      Each driven signal has the following characteristics when
      measured at the interface connector.

      VOL (low-level output voltage) = 1.7V maximum at IOL
           where IOL = 55 milliamps

      VOH (high-level output voltage) = 2.7V maximum at IOH
          where IOH = -55 milliamps

      VOD (differential voltage) = 1.0V minimum, with common-mode
          voltage ranges from -7 to +12

      VOL and VOH are measured between the output terminal and the
      SCSI device's logic ground reference.


   c. Terminator Power (TERMPWR at Pins 25 and 26)

      Terminator Power has the following requirements:

      V(TERM) = 4.0 VDC to 5.25 VDC

      600 milliamps minimum source drive capability, with 1.0 amp
      recommended current limiting (e.g., a fuse).

      1.0-milliamp maximum bus loading (except for the purposes of
      providing power to an internal terminator).

 The 1936D drive provides keyed connectors to prevent accidental
 grounding or misconnection of terminator power.

 Interface Terminator packs provide proper termination for
 the differential interface lines.


 Signal Connector J1
 -------------------
 J1 is a 50-pin connector. Signal interface connection is made via
 this connector. The signals on J1 include the 8-bit SCSI bus and
 various control and handshaking lines.

 Recommended Cable: 3M Scotchflex 3365/50 or equivalent.
 Mating connector:  3M P/N 3425-3000 or equivalent.


 J2 Multi-Function Connector/Jumper Block
 ----------------------------------------
 J2 is a 24-pin, multi-function connector/jumper block.


 J3  DC Power Connector
 ----------------------
 J3 is a 4-pin, keyed, AMP MATE-N-LOCK connector. Both +5V and +12V
 are supplied to the drive via this connector.

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


 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
 ----------------------
 Up to seven 1936 drives can be connected to a single host.

                                             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
 ---------------------------
 1936 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 1936, resulting in an MTTR of less
 than 15 minutes.


 Differential Interface
 ----------------------
 The 1936D differential interface drive is functionally and schematic-
 ally the same as the 1936S single-ended interface drive in all areas
 except those directly related to drivers, receivers, and control of
 the differential interface.

 The 1936D drive draws more power from the +5V power supply due to the
 differential transceivers; power drain from the +12V power supply re-
 mains the same as for the 1936S single-ended drive.



**********************************************************************
                      F   E   A   T   U   R   E  S
**********************************************************************
MICROPL. 1936S/D  PRODUCT DESCRIPTION 110827 REV. A


 Micropolis 1936S (single-ended) and 1936D (differential) high-
 performance, 5 -inch full-height Rigid Disk Drives provide OEMs with
 random-access, high-speed data storage and meet the needs of diverse
 applications environment. These drivers are compatible with the
 "ANSI CCS" and "SCSI-2" versions of the industry-standard Small
 Computer System Interface (SCSI) specification.


 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
 ---------

                                          | 1936   |
        ----------------------------------+--------+
        Track-to-Track  read   msec. typ. |   2    |
                        write  msec. typ. |   3    |
                       Average msec. typ. |  12    |
                               msec. max. |  28    |
        One-Third Stroke       msec. max. |  12.5  |
        Latency                msec. avg. |   5.56 |
        ----------------------------------+--------+


 1936D Drive Implementation
 --------------------------
 The 1936D drive is implemented using the same HDA mechanics and frame
 assembly as used for the 1936S and a new Device Electronics Board,
 which provides the functionality of the 1936S electronics but via the
 SCSI differential interface.

 The 1936 implementation is as follows:

  - Industry-standard differential interface.

  - Provides Terminator Power to Bus (jumper option).

  - Proteted against accidental misconnection by standard DIFFSENS
    signal.

  - Small increase in power consumption due to use of differential
    transceivers.

  - Industry-standard mounting.

  - Schematically identical to the 1936S except for differential
    drivers.

  - Uses the same SCSI control firmware as the 1936S for identical
    commands and features.

  - The 1936D mechanics is identical to the 1936S.



**********************************************************************
                      G   E   N   E   R   A   L
**********************************************************************
MICROPOL. AV LT

 What is an AV Drive?
 --------------------
 Today's demanding digital video and audio applications require disk
 drives to sustain a pre-determined minimum data transfer rate.
 Any interruptions in this data rate are detrimental to AV
 applications that require constant delivery of data at 30 frames per
 second minimum. In standard drives utilized for data processing
 requirements, the error correction and thermal calibration methods
 employed are not optimized for continuous delivery of data. These
 routine housekeeping tasks will procedure gaps in the data stream as
 long as 850 ms, resulting in jumps, gaps, and stutters in motion and
 sound when used in most AV applications.

 (MICROPOLIS 10/96)


 Installation Guide for IBM PC & Compatible
 ==========================================

 Daisy Chain Option Kit
 ----------------------
 The MICRODISK AV LT subsystem will normally be last SCSI device on
 the daisy chain. However, if you wish to daisy chain your MICRODISK
 AV LT subsystem to other SCSI devices, you will need one Daisy Chain
 Option Kit. This kit includes one each of the following items:

 - SCSI System Cable (right angle connector)
 - Daisy Chain (DCO) SCSI Backplane Cable
 - MHA Rear Cover

 Two SCSI system cables are available. Both cables have a Centronics
 50-pin connector at the MICRODISK AV LT end, and either a Centronics
 50-pin or mini-SCSI connector at the other end.

 NOTE
 Connect the SCSI system cable's right angle connector to the back of
 the module.


 Using the Daisy Chain Option Kit
 --------------------------------
 The MICRODISK AV LT subsystem will normally be the last SCSI device
 on the daisy chain. However, if you wish to daisy chain your MICRO-
 DISK AV LT subsystem to other SCSI devices, you will need one Daisy
 Chain Option Kit.

 To allow your MICRODISK AV LT subsystem to daisy chain to other SCSI
 devices, you will remove the SCSI Backplane Cable from a MICRODISK AV
 LT module (usually the TOP module in the stack), and replace it with
 a Daisy Chain SCSI Backplane Cable. You will then install the MHA
 rear cover, and connect the rightangle connector end of the SCSI
 system cable to the Daisy Chain SCSI Backplane Cable connector, and
 the other end (50-pin Centronics connector) to another SCSI device
 outside the MICRODISK AV LT subsystem.


 Installation Guide for IBM PC & Compatible
 ==========================================

 Cables/Cords
 ------------
 MICRODISK AV LT SCSI cables and AC power cords are manufactured to
 the industry standard for this type of application. MICRODISK AV LT
 module interconnect cables and cords have specific design features to
 maintain both aesthetics and uncompromising performance.

 Failure of any single power cord or SCSI cable will not cause data to
 be lost. Failure of a single cord or cable may sometimes cause all
 disk drive access to cease, but should never cause data stored on a
 MICRODISK AV LT drive to be lost.


 Getting Started
 ---------------
 There are several kits that may be shipped for assembly and installa-
 tion of a MICRODISK AV LT subsystem. The minimum MICRODISK AV LT
 subsystem requires at least:

 - One MICRODISK AV LT Module Kit.
 - One MICRODISK AV LT System Configuration Kit.
 - One SCSI/Power Cable Kit.
 - One SCSI host adapter.

 Depending on the configuration you may also need:

 - Additional SCSI host adapters.
 - One or more MICRODISK AV LT Module Kit(s).
 - One or Expansion Kit(s).
 - One or more MICRODISK AV LT Multiple Host Adapter (MHA) Option
   Kit(s) .
 - One or more MICRODISK AV LT Daisy Chain Option Kit(s).

 CAUTION
 Do not twist cable or cord connectors during unpacking or assembly;
 damage may occur.


 MICRODISK AV LT Module Kit
 --------------------------
 A MICRODISK AV LT Module Kit includes one each of the following
 items:

 - MICRODISK AV LT Module
 - Front Cover
 - Rear Cover
 - Hardware Registration Card
 - Read First Document

 To increase available storage capacity, modules may be assembled in a
 "stack".

 If you use more than nine modules in your MICRODISK AV LT subsystem,
 new stacks should be created to accommodate the additional modules.

 NOTE
 The maximum recommended number of modules in each stack is nine.

 Only seven SCSI devices can be connected to a single host adapter
 If you have more than seven modules in your stack, you must install a
 second host adapter and use a Multiple Host Adapter (MHA) Option Kit.

 If you create more than one stack, you will need one Expansion Kit
 and one SCSI/Power Cable Kit for each additional stack you create.


 System Configuration Kit
 ------------------------
 MICRODISK AV LT subsystems are assembled with the components included
 in the MICRODISK AV LT System Configuration Kit, Module Kit(s), and
 SCSI/Power Cable Kits. One System Configuration Kit is required per
 MICRODISK AV LT subsystem.

 The MICRODISK AV LT System Configuration Kit includes one each of the
 following items:

 - Top Cover
 - SCSI Terminator
 - Base Assembly (with Power Switch)
 - Read First Document
 - Assembly and Installation Guide.


 SCSI/Power Cable Kit
 --------------------
 One SCSI/Power Cable Kit is needed per stack. There are six types of
 cable kits to address the Centronics SCSI Connector (ISA) or mini-
 SCSI Connector (EISA/MCA) and three types of AC Power Cords
 available: U.S., U.K., or European:

 - U.S. Standard SCSI/Power Cable Kit
 - U.S. Mini-SCSI/Power Cable Kit
 - U.K. Standard SCSI/Power Cable Kit
 - U.K. Mini-SCSI/Power Cable Kit
 - European Standard SCSI/Power Cable Kit
 - European Mini-SCSI/Power Cable Kit

 Each type of SCSI/Power Cable Kit includes one each of the following
 items:

 - SCSI System Cable (Centronics SCSI)
 - AC Power Cord


 Expansion Kit
 -------------
 One Expansion Kit is necessary for every new stack you create.

 An Expansion Kit includes one each of the following items:

 - Top Cover
 - SCSI Terminator
 - Base Assembly (with Power Switch)


 Multiple Host Adapter Option Kit
 --------------------------------
 One MHA Option Kit, required for each additional host adapter used
 in any single stack, includes one each of the following items:

 - SCSI System Cable (right angle connector)
 - MHA SCSI Backplane Cable
 - SCSI Terminator
 - MHA Rear Cover

 Two SCSI system cables are available. Both cables have a Centronics
 50-pin connector at the MICRODISK AV LT end, and either a Centronics
 50-pin, mini-SCSI, or mini-SCSI connector at the host adapter end.

 NOTE
 Connect the SCSI system cable's right angle connector to the back of
 the module.


 Compatible SCSI Host Adapters
 -----------------------------
 Your computer needs at least one SCSI host adapter in order to
 communicate with modules in a MICRODISK AV LT subsystem. If you need
 a SCSI host adapter or have any questions, please contact your
 dealer. The following is a table showing the recommended MICRODISK AV
 LT compatible SCSI host adapters:
 +----------------+--------------------------------------+
 |                |              Architecture            |
 |Company         |    ISA       |    EISA     |  MCA    |
 +----------------+--------------+-------------+---------+
 |ADAPTEC         |AHA1540B/42B  |AHA1740/42A* |AHA1640* |
 |                |AHA1540C/42C  |             |         |
 +----------------+--------------+-------------+---------+
 |ALWAYS TECH.    |IN2000*       |             |         |
 +----------------+--------------+-------------+---------+
 |BUSTEK/BUSLOGIC |BT540/42      |BT740/42*    |         |
 +----------------+--------------+-------------+---------+
 |DPT             |PM2011        |PM2012B/90   |         |
 |                |              |PM2012B/95   |         |
 +----------------+--------------+-------------+---------+
 |DTC             |DTC3180A/3280A|DTC3190      |         |
 |                |              |DTC3290      |         |
 +----------------+--------------+-------------+---------+
 |FUTURE DOMAIN   |TMC1660*      |             |         |
 |                |TMC1670*      |             |         |
 |                |TMC1680*      |             |         |
 +----------------+--------------+-------------+---------+
 |MYLEX           |              |DCE376*      |         |
 +----------------+--------------+-------------+---------+
 |ULTRASTOR       |ULTRA14F*     |ULTRA24F*    |         |
 +----------------+--------------+-------------+---------+

 * These host adapters do not accept the standard 50-pin SCSI
   connector cable. Please contact your reseller to obtain the
   appropriate cable if you have one of these host adapters.


 Host Adapter Considerations
 ---------------------------
 - One MHA Option Kit is required for each additional host adapter you
   add to an existing stack.

 - When installing host adapters, ensure that there are no port
   address or IRQ conflicts with other cards already installed or
   planned for installation. Refer to your host adapter documentation
   for specific details.


 MICRODISK AV LT Assembly
 ------------------------
 A MICRODISK AV LT subsystem may be as small as one module, or you can
 add modules to increase storage capacity and create multiple stacks
 if you so desire.

 The minimum MICRODISK AV LT configuration requires on MICRODISK AV LT
 Module Kit, one System Configuration Kit, one SCSI cable, one power
 cord, and one SCSI host adapter.


 Terminator
 ----------
 The terminator must installed in the last module in the chain for
 each SCSI bus (Host Adapter).


 MICRODISK AV LT Series Disk Drives
 ----------------------------------
 Each module in a MICRODISK AV LT subsystem contains a MICRODISK AV LT
 Series disk drive. MICRODISK AV LT Series disk drives are engineered
 specifically for multimediam high-end graphics, and digital audio/
 video applications.

 MICRODISK AV LT Series disk drives have the highest minimum sustained
 data rate in the industry in their class at 3.0 MB/sec, and a maximum
 sustained uninterrupted data rate of 2.9 MB/sec. Industry standard
 high capacity data processing drives are not designed for high
 sustained, uninterrupted data rates - factors which are required for
 real-time recording and playback of digital audio/video data.
 Standard drives perform short, random "burst" transfers, leaving gaps
 in the data stream.


 MICRODISK AV LT Formatting/Partitioning
 ---------------------------------------
 Your MICRODISK AV LT subsystem modules need to be formatted and
 partitioned before they can be used for data storage. To perform
 these functions, use the disk formatting/partitioning utility
 program(s) that you received as part of your operating system
 software.
 The utilities prepare your MICRODISK AV LT modules for use. Under
 normal circumstances you will only need to format and partition each
 MICRODISK AV LT module once.

 NOTE
 Because each module in a MICRODISK AV LT stack is a separate,
 independent SCSI device, you must format and partition each MICRODISK
 AV LT module separately.


 Formatting the Hard Disk
 ------------------------
 Formatting lays down distinct patterns on the disk which set up the
 disk's organizational structure. You normally need to format the disk
 only once.


 Installing Partitions
 ---------------------
 Partitioning prepares a hard disk for use by the PC. Partitions allow
 you to divide the space available on the hard disk into separate
 areas which appear on the desktop as separate logical disk drives
 (volumes). This allows more flexible management of files (i.e., you
 can use one partition for word processing, another for database work,
 etc.).

 Management of back-up also becomes easier with a wellorganized and
 partitioned hard disk. A large hard disk with many small files takes
 up a lot of disk space because of the way the filing system allocates
 disk space. You can save space by partitioning the hard disk into
 smaller volumes.

 Carefully plan your partitions, as you cannot change partitions with-
 out erasing your data. If you choose to alter the sizes or types of
 partitions, you should:

 1. Back up all your files
 2. Make partitioning changes
 3. Restore the files to their new volumes.

 CAUTION
 Remember, you can change partitions later, but all the information
 stored on them will be lost. Make sure you have all data from these
 partitions backed-up before changing the partitions.

 It is not necessary to reformat the disk to redefine the partitions.


 MICRODISK AV LT Operation
 -------------------------
 The MICRODISK AV LT subsystem MUST be turned on prior to, or at the
 same time as, your computer.

 The MICRODISK AV LT subsystem MUST be turned on whenever your
 computer is on.


