
1 6 6 4    MICROPOLIS
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/HH              Cylinders    1780|     |     |
Capacity form/unform   344/  389 MB        Heads           7|     |     |
Seek time   / track  15.0/ 4.0 ms          Sector/track   54|     |     |
Controller           ESDI                  Precompensation
Cache/Buffer               KB              Landing Zone
Data transfer rate    1.875 MB/S int       Bytes/Sector      512
                            MB/S ext
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       12.8 W     Altitude    km    -0.061  3.048| -0.305 15.240
       idle               W     Shock        g         2       |     20
       seek               W     Rotation   RPM      3600
       read/write    14.3 W     Acoustic   dBA        43
       spin-up            W     ECC        Bit
                                MTBF         h     150000
                                Warranty Month        60
Lift/Lock/Park     YES          Certificates                                  

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                        L   A   Y   O   U   T
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MICROPL. 1670 SERIES  PRODUCT DESCRIPTION 106179 REV. B

  +---------------------------------------------------------+
  |                                                         |+-+ J2
  |                                                         ||X|
  | COMPONENT SIDE                                          || | ID2
  |                                                         || | ID1
  |                                                         |+-1 ID0
  |                                                         |XX
  |                                             1-+    W1++ |XX J1
  |                                         RN9 | |      ++ |XX
  |                                   Terminator| |    W2++ |XX
  |                                             | |      || |XX
  |                                             +-+      +1 |XX
  |                                                         |XX
  |                                                         |X1
  |                                         (Spare) W14 +-+ |
  |                                                 W3  | | |XX Power
  |                                                 W9  +-+ |XX J3
  +---------------------------------------------------------+  1







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



**********************************************************************
                      J   U   M   P   E   R   S
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MICROPL. 1670 SERIES  PRODUCT DESCRIPTION 106179 REV. B

 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 1670 Series 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.


 J2  Multi-Function Connector/Jumper Block
 -----------------------------------------
 J2 is a 24-pin, multi-function connector/jumper block that is used
 for connecting 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 Connectors
 ------------------------
 3/16-inch spade lugs J4 and J5 are provided for grounding.
 System characteristics determine proper ground connection.


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

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

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



 W3  Spindle Control Option
 ---------------------------
     CLOSED  The drive must wait for a START UNIT command to start the
             spindle motor.
     OPEN    The drive automatically starts the spindle motor at
             power-on. (Factory default configuration)



 W9  Bus Parity Check Option
 ---------------------------
     CLOSED  The drive neither generates nor detects parity.
     OPEN    The drive generates parity and enables parity detection.
             (Factory default configuration)



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



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                      I   N   S   T   A   L   L
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MICROPL. 1670 SERIES  PRODUCT DESCRIPTION 106179 REV. B

 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 1670 series 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 air flow is restricted, a
 fan may be required.


 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 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 (Single-ended)
 ---------------------------------------------------
 Interface control and status signals are digital (open collector TTL)
 utilizing 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 receiverd signal 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 0.4 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 0.4 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) = 4.0 VDC to 5.25 VDC

      800 milliamps minimum source drive capability.

      1.0-milliamp maximum sink capability (except for the purposes of
      providing power to an internal terminator) with 1.0 mp
      recommended current limiting (e.g., a fuse).

 The 1670 Series 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.


 J3  DC Power Connector
 ----------------------
 J3 is a 4-pin, keyed, AMP MATE-N-LOCK connector on the Motor Control
 board. Both +5V and +12V is 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.


 Interface Terminator
 --------------------
 Interface Terminator pack RN9 provides proper termination for the
 interface lines. For a multiple-device system, the terminator pack
 is installed in the LAST drive on the cable.


 Multiple-Drive Systems
 ----------------------
                                             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          RN9 |         |
                              o------+ J3   J4/J5      |         |
           ---DC-VOLTAGES-----+      +--------+--------+         |
           ---GROUND--------------------------o------------------+

 Interface Terminator RN9 is 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 1670 Series 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 1670 Series, resulting in an MTTR of
 less than 15 minutes.


 Data Transfers
 --------------
 1670 drives are capable of transferring data at 4.0 MB/s in
 SYNCHRONOUS mode and 1.6 MB/s in ASYNCHRONOUS mode.


 Read-Ahead
 ----------
 The read-ahead function causes the 1670 drive to transfer the
 requested block into its buffer and continue to read sequential
 blocks until the buffer (or segment) is filled or another command is
 received.
 On subsequent request for data, the buffer will be checked for the
 requested blocks. If the data already resides in the buffer, it will
 be transferred to the host and no media access will be necessary.
 This results in a significant improvement in performance.


 Data Buffer
 -----------
 The 64K data buffer may be divided into segments, with each segment
 holding data from a different area of this disk.
 Segmentation of the buffer maximizes the impact of read-ahead,
 especially in a multi-tasking or multi-user environment. By
 allocating a segment to each task or user, the chances of "cache
 hits" and enhanced performance are greatly increased.



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                      F   E   A   T   U   R   E  S
**********************************************************************
MICROPL. 1670 SERIES  PRODUCT DESCRIPTION 106179 REV. B

 Command Pre-Processing
 ----------------------
 Whenever possible, the 1670 Series prepares the next command for
 execution (received from another host) while the current command is
 executing. This feature takes advantage of any "dead" time, where the
 drive's microprocessor would otherwise be inactive, such as during a
 seek.

 Like the read-ahead function, command pre-processing is a time
 management technique that makes full use of the capabilities of the
 1670 Series and enhances performance in multi-initiator systems.


 Seek Time
 ---------

                                          | 1670   |
        ----------------------------------+--------+
        Track-to-Track         msec. typ. |   4    |
                       Average msec. typ. |  16    |
                               msec. max  |  37    |
        One-Third Stroke       msec. max. |  17    |
        Latency                msec. avg. |   8.33 |
                 Nominal       msec. max. |  16.67 |
        ----------------------------------+--------+


 The 1670 Series has programmable sectors sizes from 128 to 4000 bytes
 in 1-byte increments.


 Defect Management
 -----------------
 The 1670 Series has two techniques available for defect management:
 track-oriented and cylinder-oriented.


 Disk/Spindle Assembly
 ---------------------
 Up to four magnetic disks (depending on the model) are mounted on the
 spindle assembly, which includes a threephase brushless DC motor
 (commutated by three Hall-effect sensors). The casting supports each
 end of the spindle.


 Interface
 ---------
 The 1670 Series is fully compatible with the Small Computer System
 Interface (SCSI) proposed by the American National Standards
 Committee.


 Formatted Capacity Calculation
 ------------------------------
 The formatted capacity of the 1670 Series depends upon a number of
 user-selectable variables. One very critical variable is sparing,
 either track-oriented or cylinder-oriented. The following formula is
 used to calculate the formatted capacity (C) of the 1670 Series
 using cylinder-oriented sparing:

 C = [(SPT x HDS) - (SPARE_SPC)] x (1249 - 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:

 1674-7 = 4
 1674-6 = 3
 1673-5 = 3
 1673-4 = 2

 1249 is the number of physical cylinders.

 3 cylinders are used by the drive and are not user accessible.

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


