
4 3 4 5   N S   T O M A H A W K   4 L P    MICROPOLIS
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/SLIMLINE         Cylinders    4811|     |     |
Capacity form/unform  4550/      MB        Heads          11|     |     |
Seek time   / track   7.9/ 1.0 ms          Sector/track     |     |     |
Controller           SCSI3 SI/ULTR/FA20    Precompensation
Cache/Buffer           512 KB MULTI-SEGMEN Landing Zone
Data transfer rate          MB/S int       Bytes/Sector      512
                     20.000 MB/S ext SYNC
Recording method     PRML                           operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C           50    |    -40 65
Power: sleep              W     Humidity     %         5 80    |      5 80
       standby            W     Altitude    km    -0.061  2.438| -0.305 15.240
       idle          10.0 W     Shock        g        10       |     60
       seek          12.0 W     Rotation   RPM      7200
       read/write         W     Acoustic   dBA        36
       spin-up            W     ECC        Bit   ON THE FLY
                                MTBF         h    1000000
                                Warranty Month
Lift/Lock/Park     YES          Certificates     ISO9002



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MICROPL. 4345 NS  PRODUCT DESCRIPTION 110944 REV. A,  09/96

   +---------------------------------------------------------------+
   |                                                               |
   | REAR VIEW                                                     |
   |                                                               |
   |+----------------------------------------------------POWER----+|
   ||+-------------------------------------------------+-------1-+||
   |||o o o o o o o o o o o o o o o o o o o o o o o o 1| X X X X |||
   |||o o o o o o o o o o o o o o o o o o o o o o o o o| X X X X |||
   ||+--------------SIGNAL-CONNECTOR-------------------+---------+||
   ++                                                   +5V     +12V


   +------OPTION-JUMPER---------------------------------------------+
   |    +-------------------1+                +-TEST-------+        |
   |    |:::::  ::  :::::::::|           LED+ | :::::::::: |        |
   +----+--------------------+-------------++-+-FACTORY----+--------+
   |                                                                |
   |                                                                |
   +----------------------------------------------------------------+



**********************************************************************
                      J   U   M   P   E   R   S
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MICROPL. 4345 NS  PRODUCT DESCRIPTION 110944 REV. A,  09/96

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

 * = Default


 Drive Option Selection
 ----------------------

                                    +------------------- SP1
                                    |        +---------- ID2
                                    |        |  +------- ID1
                                    |        |  |  +---- ID0
     W3 W2 W1 W4  KEY      KEY      |        |  |  |  +- Remote LED+
 +--+-++-++-++-++-++--+--+-++--+--+-++--+--+-++-++-++-++
 |35|33|31|29|27|25|23|21|19|17|15|13|11|09|07|05|03|01|
 +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 |36|34|32|30|28|26|24|22|20|18|16|14|12|10|08|06|04|02|
 +-++--+--+--+--+--+-++-++--+-++-++--+-++-++--+--+--+-++
   |                 |  |     |  WP    |  |           +- Remote LED-
   |                 |  |     PTY      |  |
   |                 |  |              |  +------------- RESERVED
   |                 |  |              +---------------- SP0
   +-----------------+--+-------------------------------RESERVED

 NOTE
 Pin 4, 6, 8, 10, 12, 14, 16, 18, 22, and 24 are tied to Ground.

 Option Jumper Block J2 is a 36-pin connector used for drive
 addressing and various configuration options.

 Test Connector is for factory use only - no jumper connections
 allowed.


 Single-Ended Configuration Options
 ----------------------------------

 SCSI ID
 -------
   +----------+-----------------------+ Up to eight devices (the host
   | SCSI ID  |        Jumpers        | and seven targets) can be
   |          | ID2   | ID1   | ID0   | attached to the SCSI Bus.
   +----------+-------+-------+-------+
   |    0     | OPEN  | OPEN  | OPEN  | ID jumpers ID0, ID1 and ID2
   |    1     | OPEN  | OPEN  | CLOSED| are used to assign one of
   |    2     | OPEN  | CLOSED| OPEN  | eight SCSI ID bits (0-7) to
   |    3     | OPEN  | CLOSED| CLOSED| the drive.
   |    4     | CLOSED| OPEN  | OPEN  |
   |    5     | CLOSED| OPEN  | CLOSED| In multiple-device systems,
   |    6     | CLOSED| CLOSED| OPEN  | each drive must have its own
   | *  7     | CLOSED| CLOSED| CLOSED| unique ID.
   +----------+-------+-------+-------+


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

    SP0 OPEN   (default)
    SP1 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).

    SP1 OPEN   (default)
    SP0 OPEN   Spindle motor starts at power on.


 WP  Write Protect Option
 ------------------------
    WP CLOSED  Drive is write protected.
    WP OPEN    Drive is not write protected. (default)


 PTY  Bus Parity Check Option
 ----------------------------
    PTY CLOSED  Drive neither generates nor detects parity.
        OPEN    Drive generates parity and has parity detection
                enabled. (default)


 W1/W2/W3  Bus Termination Power Option
 --------------------------------------

 W1  CLOSED (default)
     Drive provides local terminator power.

 W2  CLOSED
     Host system provides local terminator power (via J1).

 W3  CLOSED
     Drive provides terminator power (via J1) to the SCSI BUS.


 W4 Interface Termination
 ------------------------
   W4 *INSTALLED  Drive provides termination for the interface lines,
                  i.e., onboard termination is electrically enabled.

       OMITTED    Drive does not provide termination for the interface
                  lines; i.e., onboard termination is electrically
                  disabled.

 Remote LED
 ----------
 User-supplied LED connected to Remote LED: anode connected to J2 pin
 1; cathode connected to J2 pin 2.
 => Both LEDs (on Drive and remote location) are enabled.

 LED not connected (default) => LED on Drive is enabled.



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MICROPL. 4345NS  PRODUCT DESCRIPTION 110944 REV. A, 09/96

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

 Recommended mounting orientation
 --------------------------------

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

 Dimensions and Mounting
 -----------------------
 The drive uses industry-standard mounting For 3 1/2-inch 1-inch
 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.

 No matter what mounting orientation is used, Micropolis specifies
 that the maximum HDA casting temperature not exceed 60*C (140*F).


 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 may short to PCBA components.


 Interface Electrical Characteristics
 ------------------------------------
 Interface control and status signals, using SCSI-3 Fast-20 compliant
 transmitters and receivers which provide a terminated, single-ended
 system.

 Single-ended drivers and receivers allow a maximum cable length of
 3 meters for up to four devices and a maximum cable length of 1.5
 meters for greater that four devices.

 Signal transmission requires a single 50-conductor (flat or
 twisted-pair) cable.

 A characteristic impedance of 90 ( 6) 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 1.0 VDC

   2) High-level input voltage = (Signal false) 1.9 VDC to 5.25 VDC

   3) Low-level input current =  20 microamps at 0.5 VDC

   4) High-level input current =  20 microamps at 2.7 VDC

   5) Minimum input hysteresis = 0.3 VDC

   6) Maximum input capacitance = 25 pF


  b. Output Characteristics

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

   1) Low-level input voltage = 0.0 VDC to 0.5 VDC (signal assertion)

   2) High-level input voltage = 2.5 VDC to 3.7 VDC (signal negation)

   3) Minimum driver output capability = 48 milliamps (sink) at 0.5VDC


  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.


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

 Recommended Cable: 3M Scotchflex 3801/50 or equivalent.
 Mating connector:  3M P/N 3425-3000 or equivalent.


 J1A Power Connector
 -------------------
 J1A is a 4-pin connector used to supply +5V and +12V to the drive.

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

  pin 1    +12 VDC
  pin 2    +12 Volts Return
  pin 3    + 5 Volts Return
  pin 4    + 5 VDC


 2-pin Connectors (Remote LED, etc.)
 -----------------------------------
 Recommended mating connector: Berg 69305-002 or equivalent
 Pins: Berg 77138-001
 Suggested wire size: 26-30 AWG for all pins


 SCSI ID Connector (6-pin)
 -------------------------
 Recommended mating connector: Berg 90311-006 or equivalent
 Pins: Berg 77138-001
 Suggested wire size: 26-30 AWG for all pins


 36-Pin Option Connector
 -----------------------
 Recommended mating connector: Berg 90311-036 or equivalent
 Pins: Berg 77138-001
 Suggested wire size: 26-30 AWG for all pins


 Multiple-Drive Systems
 ----------------------
                                             Drive #1
  +------HOST------+                 +-----------------+
  | +-----------+  +--+-SCSI-BUS-----+ J1              |
  | |Terminators|  |  |       +------+ J1A             |
  | +-----------+  |  |       |      +-----------------+
  |                |  |       |
  +----------------+  |       |              Drive #2
                      |       |      +-----------------+
                      +-------+------+ J1              |
                      |       o------+ J1A             |
                      |       |      +-----------------+
                      |       |
                      |       |              Drive #3
                      |       |      +-----------------+
                      +-------+------+ J1              |
                      |       o------+ J1A             |
                      |       |      +-----------------+
                      |       |
                      |       |              Drive #4
                      |       |      +--------------+--+
                      +-------+------+ J1           |T |
                              o------+ J1A          +--+
           ---DC-VOLTAGES-----+      +-----------------+

 T = TERMINATORS

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


 Temperature Measurement
 -----------------------
 Micropolis specifies the maximum HDA casting temperature to be 60*C
 (140*F).

 Not exceeding this temperature will ensure that the head-to-media
 interface never exceeds its temperature limit.

 In order to achieve the HDA casting temperature specified above,
 forced air flow, around the HDA and Device Electronics board, may be
 required. For recommended air-flow cooling, refer to the following
 table:

   Air Temperature  | Air Flow - LFPM*
  ------------------+------------------
    25*C (77*F)     |      180
  ------------------+------------------
    50*C (122*F)    |      220

 * = Linear Feet Per Minute



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                      F   E   A   T   U   R   E  S
**********************************************************************
MICROPL. 4345NS  PRODUCT DESCRIPTION 110944 REV. A,  09/96


 Description
 -----------
 This Product Description describes the Micropolis model 4345NS
 (Narrow, single-ended) Rigid Disk Drive. The drive is a member of the
 TOMAHAWK family of high-performance, 3 1/2-inch, 1-inch high Rigid
 Disk Drives.

 The drive is compatible with the "ANSI CCS" version and the "SCSI-3"
 version of the industry-standard Small Computer System Interface
 (SCSI) specification. This drive provides OEMs with random-access,
 high-speed, data storage and meet the needs of diverse applications
 environments.


 Some Features of the Drive
 --------------------------
 - Positive media protection is achieved during spin down (due to a
   STOP UNIT command or power off) by automatically retracting and
   locking the positioner in a data-free landing zone.

 - N-Segment Read-Ahead algorithm improves read performance by
   allowing many accesses to be serviced from the 512K cache buffer.

 - In-Line Defect Management (sector slipping) provides maximum
   throughput.

 - Data Integrity is ensured with CRC through the buffer, state-of-
   the-art ECC on-the-fly, and automatic retries using servo and
   data strobe offsets.


 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) and cylinder address (CYL).

 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).


 Seek Time
 ---------

                                          | 4345NS |
        ----------------------------------+--------+
        Track-to-Track         msec. typ. |   1    |
                       Average msec. typ. |   7.9  |
        Maximum                msec.      |  19.0  |
        Latency                msec. avg. |   4.17 |
        ----------------------------------+--------+


 Recording Media
 ---------------
 Aluminium disks, each 95 millimeters (3 1/2 inches) in diameter, are
 mounted on the spindle assembly. The recording surface on each disk
 is a thin coating of magnetic material, with a carbon over-coat to
 protect it.


 Air Filtration System
 ---------------------
 The drives are designed to provide contamination control within the
 HDA throughout the life of the drive with zero maintenance.

 Air within the HDA is continuously recirculated and filtered through
 a high efficiency filter. A breather filter protects the HDA from
 from inward contamination migration during air pressure changes
 associated with drive temperature or atmospheric pressure variations.


 Braking
 -------
 The heads contact an area of the disk surface which is not used for
 data storage when the disk are not spinning and during start and
 stop cycles. Dynamic braking is used to stop the spindle quickly.


 SCAM Compliance
 ---------------
 The drive is Level 1 SCAM (SCSI Configured AutoMatically) compliant
 in Microsoft Windows 95 plug-and-play environments. Drive
 installation and configuration tasks are handled without any user
 intervention; i.e., plug the drive in, turn the system on, and it
 works. (Future capability)


