
1 5 9 8 - 1 4    MICROPOLIS
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders    1925|     |     |
Capacity form/unform   965/ 1122 MB        Heads          14|     |     |
Seek time   / track  14.5/ 4.0 ms          Sector/track   71|     |     |
Controller           SCSI2 SINGLE-ENDED    Precompensation
Cache/Buffer               KB              Landing Zone
Data transfer rate          MB/S int       Bytes/Sector      512
                      4.000 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       28.0 W     Altitude    km    -0.061  3.048| -0.305 15.250
       idle               W     Shock        g         2       |     20
       seek          33.0 W     Rotation   RPM      3600
       read/write         W     Acoustic   dBA        47
       spin-up            W     ECC        Bit
                                MTBF         h     150000
                                Warranty Month
Lift/Lock/Park     YES          Certificates                                  

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MICROPL. 1590 SERIES  TECHNICAL MANUAL 105099 REV. A

  +---------------------------------------------------------++-+ J2
  |                                                  +-+W5  || |
  |                                                  +-+    || |ID 2
  |                                                  +-+W4  || |ID 1
  |                                                  +-+    |+-+ID 0
  |       COMPONENT SIDE                               +-+  |XX
  |                                                    | |  |XX
  |                                                  RN9 |  |XX J1
  |                                                    | |  |XX
  |                                                    | |  |XX
  |                                                    +-+  |XX
  |                                                  +----+ |XX
  |                                                  +----+ |XX
  |                                                  W1  W2 |XX
  |                                             +---+       |X1
  |                             Frame Ground    +---W11     |
  |                             Option     +-+W28           |XX Power
  |                                        +-+              |XX J3
  +---------------------------------------------------------+






     +--------------------------------------+
     |       +--+J4                         |
     |       +--+                           |
     |                                      |
     |  +--+J5                              |
     |  +--+                                |
     |   J2             J1           J3     |
     |.......... XXXXXXXXXXXXXXXXXX XXXXXXXX|
     +-------+++------------------1--------1+
           ID210                     Power



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                      J   U   M   P   E   R   S
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MICROPL. 1590 SERIES  TECHNICAL MANUAL 105099 REV. A

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

 x = Jumpers setting at factory


 Differential Board
 ------------------
 While jumpers may be located in different locations on the differen-
 tial board, the nomenclature is consistent with the standard SCSI
 board. Board markings will identify each option. For example, when a
 jumper is installed at W2, terminator power is provided by the host
 system via interface cable J1, pin 26.


 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 1590 disk drives have three ID jumpers which are
 used to assign one of the eight SCSI ID bits (0 - 7) to the drive.

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

 Interface Terminator pack RN9 provides proper termination for the
 interface, in a multiple-drive system, the terminator pack is
 installed in the last drive on the system.



 J2  Operator Panel Option
 -------------------------
 J2, Pin 19 and J2, Pins 21 through 23 are provided for interfacing
 the drive to a user-supplied operator panel.

 J2 Pin 19  Logic ground

        20  Not used

        21  Write Protect Input. Logic Ground disables writing and
            lights the Write Protect LED.

        22  Ready output. Logic ground indicates the drive is Ready
            and lights the Ready LED.

        23  +5V source for the LEDs.


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


 W1/W2/W11  Bus Termination Power Option
 ---------------------------------------

   +-----------------------+------------------------------------+
   |        Jumpers        |                                    |
   |  W1   |  W2   |  W11  |                                    |
   +-------+-------+-------+------------------------------------+
   | 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)          |
   +-------+-------+-------+------------------------------------+

 Under normal conditions, TERMPWR is sourced by SCSI Initiators.
 There may be some unique system configurations which needs a target
 to supply TERMPWR to the cable, W11 is provided for this requirement.


 W4  Bus Parity Check Option
 ---------------------------
     CLOSED  The drive neither generates nor detects parity.
     OPEN    The drive generates parity and enables parity detection.
             (Factory default configuration)


 W5  Spindle Control Option
 ---------------------------
     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)



 W28 Frame Ground Option
 ------------------------
     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
 -------------------------------------------
 -------------------+
 --+  +-----J3-----+|  pin 1    +12 VDC
  1|  | 4  3  2  1 ||  pin 2    +12 Volts Return
  -+  +------------+|  pin 3    + 5 Volts Return
  ------------------+  pin 4    + 5 VDC



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MICROPL. 1590 SERIES  TECHNICAL MANUAL 105099 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 1590 series uses industry-standard mounting techniques for
 5 -inch Winchester disk drives.

 Recommended orientation is vertical on either side, or horizontal
 with the Device Electronics board down.


 Mounting Screws
 ---------------
 2 per side 6-32 UNC-2B x 0.156 max deep.
 4 on bottom 6-32 UNC-2B x 0.20 max deep.


 Caution: The mounting screws must be selected so that they do not
 penetrate the bottom mounting holes more than 0.20 inches and the
 side mounting holes 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.


 Signal Connector J1
 -------------------
 J1 is a 50-pin connector on the Device Electronics board. 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


 Multi-Function Connector J2
 ---------------------------
 J2 is a 24-pin connector on the Device Electronics board and is used
 for connecting the drive to a user-supplied Operator Panel.


 Power Connector J3
 ------------------
 J3 is a 4-pin keyed AMP MATE-N-LOCK connector on the Device
 Electronics board. Both +5V and +12V is supplied to the drive via
 this connector.

 Suggested wire size is 18 AWG.
 Recommended mating connector is AMP 1-480424-0 or equivalent.
 Recommended pins are AMP PN 60619-4 (loose)
                             61117-4 (strip)


 Ground Connectors J4/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



 Interface Terminator
 --------------------
 Interface Terminator pack RN9 provides proper termination for the
 interface lines. In multiple-device systems, the terminators are
 installed in the LAST device on the cable.


 Multiple 1590 System Configuration
 ----------------------------------
                                        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 |         |
           ---DC-VOLTAGES-----o------+ J3   J4/J5 +----+         |
                                     +--------+--------+         |
           ---GROUND--------------------------+------------------+


 T = Terminator

 Up to seven 1590 drives can be connected to a single host.


 SINGLE-ENDED Interface Electrical Characteristics
 -------------------------------------------------
 Interface control and status signals are digital (open collector TTL)
 using industry-standard transmitters and receivers.

 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 (flat or twisted
 pair) cable. A characteristic impedance of 100 ( 10%) ohms is
 recommended.

   a. Input Characteristics

      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).

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



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                      F   E   A   T   U   R   E  S
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MICROPL. 1590 SERIES  TECHNICAL MANUAL 105099 REV. A


 Media Defects
 -------------
 Media defects are physical characteristics of the media which result
 in repetitive read error 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 defects are logged on
 a label affixed to the drive. The defective areas are identified by
 head address (HD), cylinder address (CYL), and number of Bytes From
 Index (BFI). A printed listing of the defects is also shipped with
 each drive.

 In addition to listing the defects on the label and the printout, the
 defects are also mapped on the drive.


 Seek Time
 ---------

                                          | 1590   |
        ----------------------------------+--------+
        Track-to-Track         msec. typ. |   4    |
                       Average msec. typ. |  14.5  |
                       Maximum msec.      |  33    |
        One-Third Stroke       msec. max. |  15.5  |
        Latency                msec. avg. |   8.33 |
        ----------------------------------+--------+



 1598-15S/1595-8S Specifications
 -------------------------------
 The 1598-15S is a short stroke version of the 1590 Series drive
 specifically engineered for applications requiring very fast access.
 This is achieved by reducing the total number of accessible
 cylinders.

 The 1595-8S is a depopulated version of the 1590 Series drive
 specifically engineered for applications which require 389 Mbytes and
 20 MHz transfer rate at the lowest possible cost. (The other drives
 require a transfer rate of 15 MHz.) This is achieved by removing
 three disks and seven data heads. The total cylinders are then
 adjusted to obtain a capacity of approximately 389 Mbytes.


 Formatted Capacity Calculation
 ------------------------------
 The formatted capacity of the 1590 Series depends upon a number of
 user-selectable variables. One critical variable is sparing, either
 track-oriented or cylinder-oriented. The following formula is used to
 calculate the formatted capacity (C) of the 1590 Series using
 cylinder-oriented sparing:

 C = [(SPT x HDS) - (SPARE_SPC)] x (1925 - 3 - SPARE_CYL) x (BYTES)

 SPARE SPC is the number of spare sectors per cylinder. This variable
 is user programmable. The recommended value varies with each drive
 model as follows:

 1598-15 = 12    1597-12 = 9    1595-09 = 7
 1598-14 = 11    1596-11 = 9    1595-08 = 6
 1597-13 = 10    1596-10 = 8    1594-07 = 6


 1925 is the number of physical cylinders.

 3 cylinders are used by the drive and are not useraccessible.

 SPARE CYL is the number of spare cylinders. This variable is user
 programmable; a typical value for sparing is 3.

 BYTES is the bytes per sector (e.g., 1024, 512, etc.)


 Preventive Maintenance
 ----------------------
 Preventive maintenance is not required during normal use.


 Corrective Maintenance
 ----------------------
 There are no field-replaceable components within the sealed area;
 therefore, cleanarea integrity MUST NOT be violated. The Micropolis
 warranty will be invalidated if any of the screws in the Head/Disk
 Assembly are removed.


