
2 1 1 2   W S    MICROPOLIS
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/HH               Cylinders    1748|     |     |
Capacity form/unform  1050/ 1214 MB        Heads          15|     |     |
Seek time   / track  10.0/ 2.0 ms          Sector/track     |     |     |
Controller           SCSI2 SI/WIDE         Precompensation
Cache/Buffer           512 KB READ-AHEAD   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         5 50    |    -40 65
Power: sleep              W     Humidity     %        10 90    |     10 95
       standby       12.0 W     Altitude    km    -0.061  3.048| -0.305 15.250
       idle               W     Shock        g        10       |     60
       seek          13.5 W     Rotation   RPM      5400
       read/write         W     Acoustic   dBA        36
       spin-up            W     ECC        Bit   64
                                MTBF         h     300000
                                Warranty Month
Lift/Lock/Park     YES          Certificates



**********************************************************************
                        L   A   Y   O   U   T
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MICROPL. 2112WS  PRODUCT DESCRIPTION 135863 REV. A

  +------------------------------------------------------------+
  |                                                       ID0-+SCSI J9
  |                                                    +J2  | || ID
  |                                          W10-+ RN1+|| ID3-+|
  |  ++J7 Remote LED Connector                 +-W11 ||++   +--+
 ++++++                                              ||+RN2 |XXXJ1
 ++++W4 LED Option               ID0+-+              ||||+W1|XXX
  |                              ID1| |              ++|||W2|XXX
  |                              ID2| |            RN3+|||| |XXX
  |                              ID3| |              ||+++W13XXX
  |  COMPONENT SIDE              PTY| |              ||     |XXX
  |                              WP | |              ||     |XXX
  |                              SP0| |              ++     |XXX
  | +-+ID3                       SP1+-+                     |XXX
  | | |   SCSI ID                                           |XXX
  | +-+ID0                                                  |   1
  |                                    +-------+            |XXXJ3
  |                                    +++++++++            |XXXPower
  +---------------------------------------------------------+   1






   Connector J2 (detail)
   ---------------------
   J2, Right-angle Spindle Sync connector mounted on solder side (far
   side).

   Pin 1 Slave Sync; 2 Not Connected; 3 Master Sync; 4 Ground;


              +-+-+-------------------------
              | +-+
              |
              |
              |
              | +-1-2-3-4--+
              | | ++++++++ J2+----J1----
              +-+-++++++++-+-+o o o o o
              +--++++++++----+o o o o
              |  ++++++++J9  +-------
              +-ID0------------------



**********************************************************************
                      J   U   M   P   E   R   S
**********************************************************************
MICROPL. 2112WS  PRODUCT DESCRIPTION 135863 REV. A

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

 x =  Factory default configuration

 SCSI ID
 -------
 NOTE: THERE ARE THREE IDENTICAL GROUPS OF ADDRESS JUMPERS ON THE
 DEVICE ELECTRONICS BOARD - ONE GROUP IS NEAR THE LED; THE SECOND
 GROUP IS IN LINE WITH SP0, SP1, WP AND PTY; AND THE THIRD GROUP IS
 ADJACENT TO CONNECTOR J1. DON NOT USE MORE THAN ONE GROUP AT THE SAME
 TIME!

   +----------+-------------------------------+
   | SCSI ID  |           Jumpers             |
   |          | 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|
   +----------+-------+-------+-------+-------+


 Up to sixteen devices (the host and fifteen targets) can be attached
 to the SCSI bus. The 2112WS has four ID jumpers. These jumpers are
 used to assign one of sixteen SCSI ID bits (0 - 15) to the drive.

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


 Interface Termination
 ---------------------
    Terminators installed at RN1, RN2, and RN3:
 x  Drive provides termination for the interface lines.

    Terminators ommitted:
    Drive does not provide termination for the interface lines.


 SP0/SP1  Spindle Control Option
 -------------------------------
    SP0  CLOSED
    SP1  OPEN    Spindle motor starts when START UNIT command is
                 received.
 x  SP0  OPEN    Spindle motor starts at power-on.



 SP0/SP1  Spindle Delay Option
 -----------------------------
    SP1  CLOSED
    SP0  OPEN    Spindle start-up is delayed based on SCSI ID (12
                 seconds per ID).
 x  SP1  OPEN    Spindle start-up delay is disabled.



 PARITY  Bus Parity Check Option
 -------------------------------
     PTY CLOSED  The drive neither generates nor detects parity.
  x      OPEN    The drive generates parity and and has parity
                 detection enabled.


 WP  Write Protect Option
 ------------------------
     WP CLOSED  The drive is write protected.
  x     OPEN    The drive is not write protected.


 W1/W2/W13  Bus Termination Power Option
 ---------------------------------------

   +-----------------------+------------------------------------+
   |        Jumpers        |                                    |
   |  W1   |  W2   |  W13  |                                    |
   +-------+-------+-------+------------------------------------+
   | CLOSED| OPEN  | OPEN  |The drive provides local terminator |
   |       |       |       |power.                              |
   +-------+-------+-------+------------------------------------+
   | OPEN  | CLOSED| OPEN  |Host system provides local          |
   |       |       |       |termination power.                  |
   +-------+-------+-------+------------------------------------+
  x| CLOSED| OPEN  | CLOSED|Drive provides local terminator     |
   |       |       |       |power and terminator power to BUS.  |
   +-------+-------+-------+------------------------------------+


 W4  Remote LED Option
 ---------------------
 x   W4  CLOSED  LED on Device Electronics board is enabled.
         OPEN    LED (user supplied) at J7 is enabled.


 W10/11  Spindle Sync Termination
 --------------------------------
    W10/W11  CLOSED  Spindle Sync is terminated
             OPEN    Spindle Sync is not terminated

 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 1) generated by an external
 source.

 Signal termination is placed on the SLAVE SYNC signal at the first
 device and the last device in the chain only.

 Master: If the drive is set to Master (RPL = 10b), it generates the
 SLAVE SYNC signal (J2, pin 1) for use directly by the slave drives.

 Signal termination is placed on the SLAVE SYNC signal at the first
 device and the last device in the chain only.

 Master Control: If the drive is set to Master Control (RPL = 11b), it
 generates the MASTER SYNC signal (J2, pin 3). This output is used by
 the controller to generate the SLAVE SYNC signal (J2, pin 1) for the
 slaves.

 Signal termination is placed on the MASTER SYNC signal at the first
 device and the last device in the chain only.

 Signal termination is placed on the SLAVE SYNC signal at the first
 device and the last device in the chain only.



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



**********************************************************************
                      I   N   S   T   A   L   L
**********************************************************************
MICROPL. 2112WD/2112WS  PRODUCT DESCRIPTION 135863 REV. A

 Notes on Installation
 =====================

 Recommended mounting orientations
 ---------------------------------

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

 The drives use industry-standard mounting for 3 -inch full-height
 Winchester disk drives.

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

 Recommend 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).


 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 mount-
 ing holes by more than 0.156 inches.

 Screws that are too long will short to PCBA components and/or prevent
 proper operation of the shock mount system.


 Mounting holes
 --------------
 3 per side and 4 on bottom #6-32 UNC-2B thru.


 Multiple-Drive Systems
 ----------------------

                                             Drive #1
  +------HOST------+                 +-----------------+
  | +-----------+  +--+-SCSI-BUS-----+ J1              |
  | |Terminators|  |  |       +------+ J3    J4        |
  | +-----------+  |  |       |      +--------+--------+
  |                |  |       |               +------------------+
  +----------------+  |       |              Drive #2            |
                      |       |      +-----------------+         |
                      +-------+------+ J1              |         |
                      |       o------+ J3    J4        |         |
                      |       |      +--------+--------+         |
                      |       |               +------------------o
                      |       |              Drive #3            |
                      |       |      +-----------------+         |
                      +-------+------+ J1              |         |
                      |       o------+ J3    J4        |         |
                      |       |      +--------+--------+         |
                      |       |               +------------------o
                      |       |              Drive #4            |
                      |       |      +--------------+--+         |
                      +-------+------+ J1           |T |         |
                              o------+ J3    J4     +--+         |
           ---DC-VOLTAGES-----+      +--------+--------+         |
           ---GROUND--------------------------o------------------+

 T = TERMINATORS

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

 Connection J4 is provided for grounding; system characteristics
 determine the proper ground connection.


 J1 Signal Connector
 -------------------
 Recommended Cable:    AMP P/N 2-57013-1 or equivalent
 Mating connector:     AMP P/N 786090-7 or equivalent


 J2 Spindle Synchronization connector
 ------------------------------------
 Recommended mating connector: MOLEX 10-11-2043 or equivalent
 Pins:                         MOLEX 08-50-0005
 Suggested wire size:          22-24 AWG for all pins


 J3 Power Connector
 ------------------
 Recommended mating connector: AMP 1-480424-0 or equivalent
 Pins:                         AMP 350078-4
 Suggested wire size:          18 AWG (minimum) for all pins.


 J4 Ground Connector
 -------------------
 3/16-inch spade lug J4 is provided for grounding. System character-
 istics determine proper ground connection.

 Recommended mating connector: AMP 60972-2 or equivalent


 J7 Remote LED Connector
 -----------------------
 Recommended mating connector: Dupont 69305-002 or equivalent
 Pins:                         Dupont 77138-001
 Suggested wire size:          26-30 AWG for all pins



 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.

 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.


 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 68-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 33, 34, 35, and 36)

      Terminator Power has the following requirements:

      V(TERM) = 4.0 VDC to 5.25 VDC

      1000 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 drive provides keyed connectors to prevent accidental
 grounding or misconnection of terminator power.


 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.


 Data Transfers
 --------------
 The drives are capable of transferring data up to 20 MBytes/sec in
 synchronous mode and 5 MBytes/sec in asynchronous mode.



**********************************************************************
                      F   E   A   T   U   R   E  S
**********************************************************************
MICROPL. 2112WD/2112WS  PRODUCT DESCRIPTION 135863 REV. A


 The single-ended and differential interface drive is 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 time by appropriate format control parameter bits.


 Seek Time
 ---------

        ----------------------------------+--------+
        Track-to-Track  read   msec. typ. |   1.5  |
                        write  msec. typ. |   2.5  |
                       Average msec. typ. |  10    |
                               msec. max. |  25    |
        Latency                msec. avg. |   5.56 |
        ----------------------------------+--------+


 Internal Data Rate
 ------------------
 24 to 40 MHz

 Sector Size = Variable; programmable up to 4096 bytes.


 Specific Features of the Drives
 -------------------------------
 2112WS Drive
 - Industry-standard 68-pin, single-ended interface connection.

 - 13.5 Watts (46.1 Btu/hr) typical power dissipation.

 - Industry-standard mounting.

 - Active termination for improved bus termination/compatibility.


 2112WD Drive
 - Industry-standard 68-pin, differential interface connection.

 - 15.5 Watts (52.9 Btu/hr) typical power dissipation.

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

 - Protected against accidental misconnection by standard DIFFSENS
   signal.

 - Industry-standard mounting.

 - Schematically identical to the Single-Ended models except for
   termination, differential drivers/receivers, and SCSI Interface
   Connector pin assignments.

- Uses the same SCSI control firmware for identical command and
  feature set to Single-Ended models.

- Differential mechanics identical to Single-Ended.


