
1 6 2 4    MICROPOLIS
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/HH              Cylinders    2099|     |     |
Capacity form/unform   668/  765 MB        Heads           7|     |     |
Seek time   / track  16.0/ 2.5 ms          Sector/track     |     |     |
Controller           SCSI2 SI/FAST         Precompensation
Cache/Buffer           256 KB SEGMENTED    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       13.6 W     Altitude    km    -0.061  3.048| -0.305 15.240
       idle          14.8 W     Shock        g         2       |     50
       seek               W     Rotation   RPM      3600
       read/write    14.0 W     Acoustic   dBA        41
       spin-up            W     ECC        Bit   64
                                MTBF         h     150000
                                Warranty Month        60
Lift/Lock/Park     YES          Certificates



**********************************************************************
                        L   A   Y   O   U   T
**********************************************************************
MICROPL. 1624  PRODUCT DESCRIPTION 110825 REV. A

  +---------------------------------------------------------++-+
  |                                               W2++      || 20  J2
  |                                                 ||++    || |
  |   COMPONENT SIDE                              W1++++W31 || |  ID2
  |                                                         || |  ID1
  |                                                  RN1-+  |1-2  ID0
  |                                        Interface  |  |  |XX
  |                                        Terminator |  |  |XX
  |                                                   |  |  |XX
  |                                                   +--+  |XX
  |                                                         |XX J1
  |                                                         |XX
  |W12 W13                                                  |XX
  |+----+                                                   |XX
  |+----+ LED                                               |  1
  |                                                 W8+--+  |XX J3
  |                                                   +--+  |X1 Power
  +---------------------------------------------------------+  (Solder
                                                                Side)






     +--------------------------------------+
     |     ++J4 HDA                         |
     |     ++                       ++J5    |
     |                              ++ Frame|
     |                                      |
     |                                 J3  1|
     |   J2    1        J1        1 xxxxxxxx|
     +..........-XXXXXXXXXXXXXXXXXX-xxxxxxxx+
     +-Multi-+++---Signal------------Power--+
             |||
             ||+--- SCSI ID0
             |+---- SCSI ID1
             +----- SCSI ID2



**********************************************************************
                      J   U   M   P   E   R   S
**********************************************************************
MICROPL. 1624  PRODUCT DESCRIPTION  110825 REV. A

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

 x = Jumpers setting at factory


 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 1624 disk 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.

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

 Interface Terminator pack RN1 provides proper termination for the
 interface lines. For a multiple-drive system, the terminator pack is
 installed in the last drive on the cable.


 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  Write Protect Option
 ------------------------
     Pin 11-12 CLOSED  The drive is write protected. CAUTION: The
                       drive can still be formatted.
               OPEN    The drive is not write protected. (Factory
                       default configuration)


 J2  Bus Parity Check Option
 ---------------------------
     Pin 13-14 CLOSED  The drive neither generates nor detects parity.
               OPEN    The drive generates parity and enables parity
                       detection. (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/W31  Bus Termination Power Option
 ---------------------------------------

   +-----------------------+------------------------------------+
   |        Jumpers        |                                    |
   |  W1   |  W2   |  W31  |                                    |
   +-------+-------+-------+------------------------------------+
   | 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 W31 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 W31.



 W8/9  Spindle Synchronization Option
 ------------------------------------
 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 20) supplied by an external
 source.

 Master: If the drive is set to Master (RPL = 10b), it generates the
 SLAVE SYNC output signal (J2, pin 20) 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 20) for the
 slaves.


 W12/W13  LED Color Option
 -------------------------
 A jumper is installed at W12 or W13 to select the color of the LED.

      W12  CLOSED  The red LED is selected
      W13  CLOSED  The green LED is selected (Factory default)


 W14  Frame Ground Option
 ------------------------
      W14  CLOSED  Frame ground is connected to logic ground
           OPEN    Frame ground is not connected to logic ground
                   (Factory default configuration)



**********************************************************************
                      I   N   S   T   A   L   L
**********************************************************************
MICROPL. 1624  PRODUCT DESCRIPTION 110825 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 1624 disk drive uses industry-standard mounting for 5 -inch
 half-height Winchester disk drives.

 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).

 Inasmuch as the drive frame acts as a heat sink to dissipate heat
 from the unit, the enclosure and mounting structure should be
 designed to allow natural convection of heat around the HDA and
 frame. If the enclosure is small or natural convection is limited,
 a fan may be required. In any case, no point on the HDA assembly
 should exceed 62*C (143*F).


 Mounting Screws
 ---------------
 4 per side 6-32 UNC-2B x 0.10 deep (thru hole).
 4 on bottom 6-32 UNC-2B x 0.22 deep

 Caution: To avoid restricting HDA sway space, the mounting screws
 must not penetrate the side mounting holes by more than .10 (+.00,
 -.03) inch or the bottom mounting holes by more than .20 (+.00, -.03)
 inch.

 Torque applied to the screws must not exceed 8 in-lbs.


 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).

 The 1624 disk drive provides keyed connectors to prevent accidental
 grounding or misconnection of terminator power.


 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 that is used
 for drive address selection.


 J3  DC Power Connector
 ----------------------
 J3 is a 4-pin, keyed, AMP MATE-N-LOCK connector on the Motor Control
 board. 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 1624 disk 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      |         |
                      |       |      +--------+--------+         |
                      |       |               +------------------o
                      |       |              Drive #3            |
                      |       |      +-----------------+         |
                      +-------+------+ J1              |         |
                      |       o------+ J3   J4/J5      |         |
                      |       |      +--------+--------+         |
                      |       |               +------------------o
                      |       |              Drive #4            |
                      |       |      +--------------+--+         |
                      +-------+------+ J1           |T |         |
                              o------+ J3   J4/J5   +--+         |
           --DC-Voltages------+      +--------+--------+         |
           ---GROUND--------------------------o------------------+

 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 1624 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 1624, resulting in an MTTR of less
 than 15 minutes.


 Multi-Segment Data Buffer/Cache
 -------------------------------
 The 256K data buffer is dynamically divided into segments with each
 segment holding data from different areas of the disk. This maximizes
 the improvement of read-ahead technology by greatly increasing the
 probability of a cache hit.

 This feature improves the performance of all types of systems; from
 single threaded DOS environments to complex architectures like UNIX
 with its own system caches.



**********************************************************************
                      F   E   A   T   U   R   E  S
**********************************************************************
MICROPL. 1624  PRODUCT DESCRIPTION  110825 REV. A


 Micropolis 1624 (single-ended) high-performance, 5 -inch half-height
 Winchester Disk Drives provide users with high-speed, random-access
 storage. The drives are fully compatible with the industry standard
 Small Computer System Interface (SCSI) and are designed to meet the
 needs of diverse applications environments.


 Some Features of the Drive
 --------------------------
 Programmable sector sizes from 180 to 4096 bytes in 1-byte in-
 crements.

 Automatic error recovery.

 Performance is enhanced by low SCSI command overhead and intelligent
 features such as read-ahead and sophisticated buffer management.

 SCSI-2 Tagged Command Queuing greatly increases performance by
 allowing the drive to optimize the execution sequence of command
 strings (from single or multiple initiation).


 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). A pronted listing of the
 defects is also shipped with each drive.

 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).

 The entries it contains can be mapped out (reassigned) automatically
 during the operation by appropriate use of the format control para-
 meter bits.


 Seek Time
 ---------

                                          | 1624   |
        ----------------------------------+--------+
                Adjacent Track msec.      |   2.5  |
                       Average msec.      |  16    |
                   Full Stroke msec.      |  30    |
              One-Third Stroke msec. max. |  16.5  |
        Latency                msec. avg. |   8.33 |
        ----------------------------------+--------+


