
2 1 1 2   A    MICROPOLIS
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/HH               Cylinders    1760| 1024| 1010|
Capacity form/unform  1050/ 1214 MB        Heads          15|   16|   16|
Seek time   / track  10.0/ 1.5 ms          Sector/track     |   63|   63|
Controller           IDE / AT              Precompensation
Cache/Buffer           512 KB SEGMENTED    Landing Zone
Data transfer rate          MB/S int       Bytes/Sector      512
                      5.600 MB/S ext
Recording method     RLL                            operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         5 50    |    -40 65
Power: sleep              W     Humidity     %        10 90    |     10 95
       standby            W     Altitude    km    -0.061  3.048| -0.305 15.240
       idle               W     Shock        g         5       |     60
       seek          13.0 W     Rotation   RPM      5400
       read/write    11.5 W     Acoustic   dBA        35
       spin-up            W     ECC        Bit   88,REED SOLOMON
                                MTBF         h     300000
                                Warranty Month        60
Lift/Lock/Park     YES          Certificates



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MICROPL. 2112A  PRODUCT DESCRIPTION 135814 REV. A

  +---------------------------------------------------------+
  |                                                         |XX J2
  |                                                         1xx Power
  |                                                         |XX
 ++ LED                                                     |XX
 ++                                                         |XX
  |                                                         |XX J1
  |                                               1-+       |XX
  |                                             W1+-+J6     |XX
  |                                             W2+-+       |XX
  |                                       Reserved+-+       |XX
  |                                       Reserved+-+       |XX
  |                                       Reserved+-+       |XX
  |                                                         |X1
  |                                                         |
  |                                                         |XX J3
  |                                                         |XX Power
  +----------------------------------xxxxxx-----------------+  1







     +--------------------------------------+
     |    ++J4                              |
     |    ++  Frame Ground                  |
     |                                      |
     |                                      |
     |                                      |
     |   J2             J1        1   J3    |
     +xxxxx1-XXXXXXXXXXXXXXXXXXXXXX-XXXXXXXX+
     +Power--------Signal------------Power-1+



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MICROPL. 2112A  PRODUCT DESCRIPTION 135814 REV. A

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

 Master/Slave Selection
 ----------------------
 The interface allows up to two drives (a Master and one Slave) to be
 attached to the AT/IDE bus.

 +----------------+-------------------------------------+
 |   Jumpers      |                                     |
 | W2      W1     |Description                          |
 +----------------+-------------------------------------+
 | CLOSED  CLOSED |Drive emulates both Master and Slave |
 |                |(The factory default definition)     |
 +----------------+-------------------------------------+
 | CLOSED  OPEN   |Drive is Master, Slave is present    |
 +----------------+-------------------------------------+
 | OPEN    CLOSED |Drive is Slave                       |
 +----------------+-------------------------------------+
 | OPEN    OPEN   |Drive is Master                      |
 +----------------+-------------------------------------+

 Drive emulates both Master and Slave:
 Specifies that one 2112A can emulate both the Master drive (Drive 0)
 and the Slave Drive (Drive 1). This option allows for existing host
 systems to utilize the full capacity of the drive.

 When the drive is configured as both the Master and the Slave, the
 Master's (Drive 0) capacity is set to 1024 logical cylinders, 16
 logical heads, and 63 logical sectors. This setting yield 528,482,304
 bytes. The Slave's Drive (Drive 1) is set to the remaining storage
 on the disk drive.

 For this configuration, the recommended drive type setting in the
 computer's CMOS memory is as follows:

   Drive 0: 1024 logical cylinders, 16 logical heads, 63 logical
            sectors
   Drive 1: 1010 logical cylinders, 16 logical heads, 63 logical
            sectors

 Note:
 The capacity of the 2112A drive may exceed the capacity that the host
 can access. This limitation stems from the communication link between
 the DOS and the BIOS. A typical limit is 1024 cylinders, 16 heads,
 and 63 sectors. For optimum use of the following options, the BIOS
 may need to be modified.

 Drive is Master, Slave is present:
 Specifies the Master Drive (Drive 0) when two 2112A drives are used
 in a system. The other drive is Slave.

 Drive is Slave:
 Specifies the Slave drive (Drive 1) when two 2112A drives are used in
 a system. The other drive is Master.

 Drive is Master:
 Specifies the Master drive (Drive 0) when one 2112A drive is used in
 a system.


 J2   DC Power and pin connector assignments
 -------------------------------------------
      +---------+   pin 1    +5 V
      | 1  2  3 |   pin 2    +12 V
      +---------+   pin 3    Return


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



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MICROPL. 2112A  PRODUCT DESCRIPTION 135814 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 2112A drive uses industry-standard mounting techniques for
 3 -inch full-height Winchester disk drives.

 The drive is designed such that the outer frame should be hard
 mounted to the host equipment; no additional/external shock mounts
 should be used.

 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).

 The term "ambient" becomes imprecise when referencing a drive in a
 system, since it is difficult to determine where the air temperature
 should be measured. To help resolve this confusion, Micropolis
 specifies that the maximum HDA casting temperature (regardless of the
 air temperature around the drive) is 60*C (140*F). Not exceeding this
 temperature will ensure that the head-to-media interface never exceed
 its temperature limit.


 Mounting Screws
 ---------------
 3 per side 6-32 UNC-2B thru
 4 on bottom 6-32 UNC-2B thru

 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 will short to PCBA components and/or prevent
 proper operation of the shock mount system and may damage the HDA.


 Interface Electrical Characteristics
 ------------------------------------
 Interface control, data, and status signals are TTL compatible in
 both send and receive directions. Maximum cable length is 18 inches.
 The following cable specification are provided to ensure system
 integrity.

 Driver IOL sink current = 12 milliamps (minimum)
 Driver IOH source current is -400 microamps (maximum)
 Cable capacitive loading = 200 picofarads (maximum)


 Signal Connector J1
 -------------------
 J1 is a 40-pin connector. The bus interface connection is made via
 this connector. Signals on J1 include the 16-bit data bus and control
 and address lines.

 Recommended Cable: 3M Scotchflex 3302-40 or equivalent.
 Mating connector:  3M 3417-7000 or equivalent.


 J2  DC Power Connector
 ----------------------
 J2 is a 3-pin, keyed connector. Both +5V and +12V are supplied to the
 drive via this connector. This power connector is usually used by
 low-power computer systems.

 Mating Connector: MOLEX 5480 or equivalent


 J3  DC Power Connector
 ----------------------
 J3 is a 4-pin, keyed, AMP MATE-N-LOCK connector. Both +5V and +12V
 are supplied to the drive via this connector. This power connector
 is the industry standard and is used in most applications.

    Mating Connector:   AMP 1-480424-0 or equivalent
                Pins:   AMP 350078-4
 Suggested Wire Size:   18 AWG


 Ground Connector J4
 -------------------
 3/16-inch spade lug J4 is provided for grounding. Systems
 characteristics determine proper ground connection.

 Mating connector: AMP 60972-2 or equivalent.


 Adjustments and Maintenance
 ---------------------------
 2112A 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 2112A, resulting in an MTTR of less
 than 15 minutes.



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MICROPL. 2112A  PRODUCT DESCRIPTION 135814 REV. A


 The Micropolis 2112A high-performance, 3 -inch, full-height
 Rigid Disk Drive provides OEMs with high-speed, random access data
 storage and meet the needs of diverse applications environment.

 The drive is compatible with the proposed ANSI ATA (AT Attachment)
 specification.


 How to Access Large Capacity IDE Disk Driver
 --------------------------------------------
 Many disk drive users think that the IDE interface cannot be used
 with high capacity disk drives. This is absolutely not so!

 The Disk Operating System (DOS) provides for the file system stored
 in the disk drive. The application programs access the disk drives
 by activating specific DOS interrupts. The DOS interrupt service
 program activates the DOS disk drive device driver that services disk
 access request. The DOS driver activates the BIOS interrupt 13H. The
 BIOS program services disk access request by activating the disk
 drive IDE interface commands.

 The ONTRACK MANAGER utility software including the following
 features:
     a. Automated installation and setup
     b. Driver software for single drive 1 GB operation
     c. Read/Write multiple sector performance driver


 Seek Time
 ---------

                                          | 2112A  |
        ----------------------------------+--------+
        Track-to-Track  read   msec. typ. |   1.5  |
                        write  msec. typ. |   2.5  |
                       Average msec. typ. |  10    |
                               msec. max. |  25    |
        Latency                msec. avg. |   5.56 |
        ----------------------------------+--------+


