EMULEX CORPORATION

MD23, MD24

Data bus: None (SCSI to ESDI interface)

Size: Drive card

Hard drives supported: SCSI to four RLL ESDI drives

Floppy drives supported: None

[Image]

                        CONNECTIONS                          MD23   MD24

  34-pin control cable                   P1          P1
  connector-hard drive

  20-pin data cable connector-drive      J2          J2
  0

  20-pin data cable connector-drive      J3          J3
  1

  10-pin connector-user panel            J4          J6
  (factory use only)

  14-pin connector-test (factory         J5          J8
  use only)

  50-pin SCSI connector- to host         J6          J9
  adapter

  4-pin connector-DC power               J7         J10

  20-pin data cable connector-drive      J8          J4
  2

  20-pin data cable connector-drive      J9          J5
  3

  10-pin connector-user panel           J10          J7
  (factory use only)

                        USER CONFIGURABLE SETTINGS

              Function                    Location            Setting

      Not used                          SW1/switch 4            N/A

  »   Sector size set to 512 bytes      SW1/switch 5            open

      Sector size set to 256 bytes      SW1/switch 5           closed

  »   Spindle motor starts on           SW1/switch 6            open
      power-up

      Spindle motor starts on           SW1/switch 6           closed
      command

  »   Soft error reporting enabled      SW1/switch 7            open

      Soft error reporting              SW1/switch 7           closed
      disabled

  »   SCSI parity check disabled        SW1/switch 8            open

      SCSI parity check enabled         SW1/switch 8           closed

                               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

                       MISCELLANEOUS TECHNICAL NOTES

   Note: For the SCSI termination power option, a # 1N5817 diode must be
              installed at socket CR2 and JP1 must be closed