                  MICROPOLIS 4110 DISK DRIVE
                        SPECIFICATIONS

                                       
Unformatted Capacity:                 

Total Mbytes            -------------  1,205  ----------------       
Disk Platters           -----------------  5  ----------------       
Read/Write Heads        -----------------  9  ----------------        
Cylinders               -------------  2,428  ----------------        
Bytes per track         ----------  VARIABLE  ----------------
Megabytes per Surface   ------------  133.85  ----------------

Formatted Capacity  

Total Mbytes            -------------  1,052  ----------------        
Cylinders               -------------  2,415  ----------------
Bytes per Sector        ---------------  512  ----------------        
Sectors per Track       ----------- VARIABLE  ----------------

Last Block Addressed    ---------  2,053,879  ----------------


GENERAL SETUP (PC-Compatible)  ------------------------------------------------

    When using SCSI in a PC, the most common method is to run your       
    setup program and define No Drives Present. The SCSI Host Adapter    
    will automatically self-configure on power-up. To install the        
    drive, follow the manufacturer's instructions to use the on-board    
    BIOS routine or software that was supplied with the Host Adapter.   


GENERAL PERFORMANCE SPECIFICATIONS  -------------------------------------------

    Seek Time              Track-to-Track (read)                  1.5 msec
                           Track-to-Track (write)                 2.5 msec
                           Average (read)                         8.5 msec
                           Maximum                                 20 msec

    Average Rotational Latency                                   5.56 msec

    Start Time                                          20 seconds maximum
    Stop Time                                           20 seconds maximum

    Internal Data Rate                                    30.9 to 46.6 MHz

    Data Transfer Rate at Interface  
         Synchronous                                   Up to 10 Mbytes/sec
         Asynchronous                                  Up to  5 Mbytes/sec

    Spindle Speed                                                 5400 RPM
    Speed Variation                                              +/- 0.5 %


GENERAL FUNCTIONAL SPECIFICATIONS  --------------------------------------------

    Interface                                                  Fast SCSI-2
    Supports Full Common Command Set                                   YES
    Mounting Plane                                         Any orientation


RELIABILITY  ------------------------------------------------------------------

    Errors (these figures reflect baisc HDA error rates)
  
         Soft Read                                <= 10 in 10^11 bits read
         Hard Read                                <= 10 in 10^13 bits read
         Seek                                     <= 10 in 10^ 7 bits read

    MTBF (Mean Time Between Failure)                500,000 Power-On Hours

    MTTR (Maximum Time To Repair)                               15 Minutes


POWER REQUIREMENTS AND DISSIPATION  -------------------------------------------
  
    Specifications based on a typical drive with nominal voltage.
    Use of on board terminator may add 0.7 Watts

                         Start-up    Idle    Transfer    Seek
      +5V +/- 5%           0.5A      0.43A     0.67A     0.5A   typical
                           0.6A      0.50A     0.77A     0.6A   maximum

     +12V +/- 5%           1.3A      0.40A     0.40A     0.6A   typical
                           1.4A      0.50A     0.50A     0.7A   maximum
 
     Power dissipation,  Stand-by:                  6.25 Watts (21.3 BTU/Hr)
                         Positioning (average):     7.50 Watts (25.6 BTU/Hr)


SHOCK  ------------------------------------------------------------------------

     Operating
          No permanent damage or data corruption will occur when the drive is 
          subjected to shock up to the following levels, in one axis at a time.
      
                                 1/2 Sinusoidal             10 G, 11 msec
                                                            18 G, 3  msec
      Non-Operating
          The drive will sustain no damage if subjected to shock up to the 
          following levels.
               
               Packaged (in standard Micropolis shipping container)

                    Single Pack                       48 inches free fall
                    Multi-Pack                        36 inches free fall 
 
               Unpackaged
                
                    Free-fall drop                            0.75 inches
                    Topple test                               1.0  inches
                    1/2 sinusoidal                      60 G max, 11 msec
                                                       110 G max,  3 msec

VIBRATION AND ACOUSTIC NOISE  -------------------------------------------------

     Operating
          The drive can be operated and subjected to vibration up to the 
          following levels:
      
                                  5 -  40 Hz      0.006 inches, peak-peak
                                 40 - 500 Hz      0.5 G peak

          The drive will continue to operate and will have no unrecoverable 
          errors up to the following levels:

                                  5 - 500 Hz      2.5 G peak

     Non-Operating
          The drive will sustain no damage if subjected to vibration up to 
          the following levels:
      
                                  5 -  40 Hz      10 G peak

     Acoustic Noise                       Idling:       31 dBA (4.3 Bels)
                                          Seeking:      34 dBA (4.6 Bels)

ENVIRONMENTAL LIMITS  ---------------------------------------------------------

                                  OPERATING                STORAGE
     Ambient Temperature:         0 C to 55 C              -40 C to 65 C
                                  32 F to 131 F            -40 F to 149 F

     Temperature Gradient, Max:   2.0 C / 5 Minutes        24.0 C / Hour *
                                  3.6 F / 5 Minutes        43.2 F / Hour

     Relative Humidity            5 % to 95%               5% to 95%
                                  non-condensing           non-condensing

     Altitude                     -200 ft to 10,000 ft     -1,000 to 50,000 ft

     * This gradient should not be exceeded when moving the drive from storage 
       to operation.


GENERAL PHYSICAL SPECIFICATIONS  ---------------------------------------------- 

     Typical Drive    Height:    1.00 inches     25.4 millimeters
                       Width:    4.00 inches    101.6 millimeters
                       Depth:    5.75 inches    145.1 millimeters
               
                      Weight:    1.40 pounds     0.64 kilograms



DRIVE ADDRESSING AND INTERFACE TERMINATION  -----------------------------------


        +-------------------------------------------------------------+
        |##|                                                          |
   J1A  |##|                                                          |
        |##|                                                          |
        +--+                                                          |
        |##| :                                                        |
    J1  |##| :                                                  LED =(*)
        |##| :                                                        |
        |##| :                                                       +-+
        |##| :RN2                                                    |#|
        |##|        W3 ..     .. ID0                See next         |#|
        |##| :RN1   W2 ..     .. ID1                diagram for      |#| --+
        |##| :      W1 ..     .. ID2                other control    |#|   |
        |##| :                                      jumper settings  |#|   |
        |##| :                                                       |#|   |
        |##| :                                             W11 ..    +-+   |
        |##|                                               W10 ..     |    |
        +-------------------------------------------------------------+    |
                                                                           |
                                                                           |
                                                                           |
             23 21 19 17 15 13 11 09 07 05 03 01    Pin                    |
          +--------------------------------------+                     /|  |
  __(*)___|  O  O  O  O  O  O  O  O  O  O  O  O  |  (+) Positive      <-|--+
    LED   |  O  O  O  O  O  O  O  O  O  O  O  O  |  (-) Negative       \|
          +--------------------------------------+
             24 22 20 18 16 14 12 10 08 06 04 02    Pin
             +- +- +- +-    +- +- +- +-    +- +-
             |  |  |  |     |  |  |  |     |  |
             |  |  |  |     |  |  |  |     |  +-> SSYNC  Slave Sync Signal
             |  |  |  |     |  |  |  |     +----> MSYNC  Master Sync Signal
             |  |  |  |     |  |  |  +----------> PTY    Bus Parity Check Option
             |  |  |  |     |  |  +-------------> WP     Write Protect Option
             |  |  |  |     |  +----------------> SP1    Sindle Delay Option
             |  |  |  |     +-------------------> SP0    Spindle Control Option
             |  |  |  +-------------------------> ID2    SCSI ID Selector 2
             |  |  +----------------------------> ID1    SCSI ID Selector 1
             |  +-------------------------------> ID0    SCSI iD Selector 0
             +----------------------------------> LED    Remote LED 


SCSI ADDRESS JUMPERS (ID0, ID1, ID2)  -----------------------------------------
 
     Up to eight devices (the host and seven targets) can be attached to the 
SCSI bus at one time.
     ID jumpers ID0, ID1, and ID2 are used to assign one of eight SCSI iID bits 
(0-7) to the drive.
     Note also that there are two jumper sets to set SCSI id settings, one closer to the LED, the other in the middle of the board. We do not preconfigure the block closest to the LED (default set to 0) but do configure the middle block to SCSI id 7 (factory default configuration.
     In multiple device systems, each drive must have its own unique SCSI ID.

                     SCSI              Jumpers  
                    Address        ID2   ID1   ID0  
                    -------        ---   ---   ---  
                       0           out   out   out  
                       1           out   out    in  
                       2           out    in   out  
                       3           out    in    in  
                       4            in   out   out  
                       5            in   out    in  
                       6            in    in   out  
                       7            in    in    in  (Default)
  
 
INTERFACE TERMINATOR (RN1, RN2)  ----------------------------------------------

  The Interface Terminator factory installed at RN1 and RN2, which
  provides proper termination for the interface lines. When 
  daisy-chaining multiple drives, leave the terminators installed 
  only in the last physical drive (or drives) on the daisy chain 
  cable; remove the terminating resistors from each of the other drives 
  (or the host computer). 
 
BUS TERMINATION POWER OPTION (W1, W2, W3)  ------------------------------------

  A jumper is installed at W1, at W2, or at W2 and W3 to select the   
  source of terminator power (+5V) for the SCSI Bus terminator packs on 
  the device electronics board.

  When a jumper is installed at W1 (the factory default configuration), 
  the drive provides terminator power to it's on-board terminators, otherwise 
  known as local termination power.

  When a jumper is installed at W2 , terminator power is is provided by 
  the host system via the interface cable J1, pin 26 (TERMPWR).

  When a jumper is installl at both W1 and W3, the drive provides     
  terminator power to its on-board terminators and also to the SCSI bus 
  via interface cable J1, pin 26 (TERMPWR).

SPINDLE CONTROL OPTION  -------------------------------------------------------

  A jumper at SPIN0 is used to select the spindle control option.

  When a jumper is installed, the drive must wait for an interface 
  START UNIT command to start the spindle motor.

  When a jumper is NOT installed, (the factory default configuaration),
  the drive automatically starts the spindle motor at power-on.

SPINDLE DELAY OPTION  ----------------------------------------------------------

  A jumper at SPIN1 is used to select the spindle delay option 
  (spindle start-up is delayed based upon the SCSI ID). Delay time
  per ID is 12 seconds.

  When a jumper is installed, spindle delay is enabled.
 
  When a jumper is NOT installed, (the factory default configuaration),
  spindle delay is disabled.

BUS PARITY OPTION  ------------------------------------------------------------

  A jumper at PTY is used to select parity check option.

  When a jumper is installed, the drive neither generates nor detects parity.

  When a jumper is not installed (the factory default configuration), the drive 
  generates parity and has parity detection enabled.

WRITE PROTECT OPTION  ------------------------------------------------------- 

  A jumper at WP is used to write protect the drive. Please note that the

  When a jumper is installed, the drive is write protected.

  When a jumper is not installed (factory default configuration), data can be 
  written to the drive (

REMOTE LED SELECTOR  ----------------------------------------------------------
  
  When a remote LED is connected to the LED jumper, both LEDs (On device 
  electronics boards and remote location) are enabled.

  When a remote LED is not connected to the LED jumper, only the device 
  electronics board LED is enabled.

SPINDLE SYNCHRONIZATION OPTION  -----------------------------------------------

  Jumpers installed at W10 and W11 provide termination for the Spindle
  Synchronization signals (Slave Sync and Master Sync respectively).

  When Spindle Synchronization is to be implemented, jumpers W10 and W11
  are removed from all drives except the last drive on the cable.

  The Rotational Position Locking field(MODE SELECT command, Page Code 
  04h) is used to specify spindle synchronization operation; see       
  document #110366(Scsi Implementation in Micropolis "MZR" Products) and 
  ANSI-2 SCSI Standard.

  Unsynchronized:  If the drive is set to Unsynchronized(PRL=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 20). This output 
                   is used by the controller to generate the SLAVE SYNC 
                   signal(J2,pin 20) for the  slave drives.
