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       # EMULEX CORPORATION
       
          MD25A, MD26A
       
          +------------------------------------------------------------+
          +------------------------------------------------------------+
       
          Data bus: None (SCSI to ESDI interface)
       
          Size: Drive card
       
          Hard drives supported:  SCSI to four RLL ESDI drives
       
          Floppy drives supported: None
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |                    Function                    | Location  |
          |------------------------------------------------+-----------|
          | 34-pin control cable connector-hard drive      |    J1     |
          |------------------------------------------------+-----------|
          | 20-pin data cable connector-drive 0            |    J2     |
          |------------------------------------------------+-----------|
          | 20-pin data cable connector-drive 1            |    J3     |
          |------------------------------------------------+-----------|
          | 10-pin connector-user panel (factory use only) |    J4     |
          |------------------------------------------------+-----------|
          | 14-pin connector-test (factory use only)       |    J5     |
          |------------------------------------------------+-----------|
          | 50-pin SCSI connector- to host adapter         |    J6     |
          |------------------------------------------------+-----------|
          | 4-pin connector-DC power                       |    J7     |
          |------------------------------------------------+-----------|
          | 20-pin data cable connector-drive 2            |    J8     |
          |------------------------------------------------+-----------|
          | 20-pin data cable connector-drive 3            |    J9     |
          |------------------------------------------------+-----------|
          | 10-pin connector-user panel (factory use only) |    J10    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |             Function              |   Location   | Setting |
          |-----------------------------------+--------------+---------|
          | » | Soft error reporting disabled | SW1/switch 4 |   on    |
          |---+-------------------------------+--------------+---------|
          |   | Soft error reporting enabled  | SW1/switch 4 |   off   |
          |---+-------------------------------+--------------+---------|
          | » | Sector size set to 512 bytes  | SW1/switch 5 |   off   |
          |---+-------------------------------+--------------+---------|
          |   | Sector size set to 256 bytes  | SW1/switch 5 |   on    |
          |---+-------------------------------+--------------+---------|
          | » | Spindle motor starts on       | SW1/switch 6 |   off   |
          |   | power-up                      |              |         |
          |---+-------------------------------+--------------+---------|
          |   | Spindle motor starts on       | SW1/switch 6 |   on    |
          |   | command                       |              |         |
          |---+-------------------------------+--------------+---------|
          | » | SCSI parity check disabled    | SW1/switch 7 |   off   |
          |---+-------------------------------+--------------+---------|
          |   | SCSI parity check enabled     | SW1/switch 7 |   on    |
          |---+-------------------------------+--------------+---------|
          |   | Not used                      | SW1/switch 8 |   N/A   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        SCSI ADDRESS                        |
          |------------------------------------------------------------|
          |  SCSI ID   | SW1/switch 1  | SW1/switch 2  | SW1/switch 3  |
          |------------+---------------+---------------+---------------|
          |    |   0   |      off      |      off      |      off      |
          |----+-------+---------------+---------------+---------------|
          |    |   1   |      on       |      off      |      off      |
          |----+-------+---------------+---------------+---------------|
          |    |   2   |      off      |      on       |      off      |
          |----+-------+---------------+---------------+---------------|
          |    |   3   |      on       |      on       |      off      |
          |----+-------+---------------+---------------+---------------|
          |    |   4   |      off      |      off      |      on       |
          |----+-------+---------------+---------------+---------------|
          |    |   5   |      on       |      off      |      on       |
          |----+-------+---------------+---------------+---------------|
          |    |   6   |      off      |      on       |      on       |
          |----+-------+---------------+---------------+---------------|
          | »  |   7   |      on       |      on       |      on       |
          +------------------------------------------------------------+