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# 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
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS | MD23 | MD24 |
|----------------------------------------------+-------------|
| 34-pin control cable | P1 | P1 | |
| connector-hard drive | | | |
|----------------------------------+-----+-----| |
| 20-pin data cable | J2 | J2 | |
| connector-drive 0 | | | |
|----------------------------------+-----+-----| |
| 20-pin data cable | J3 | J3 | |
| connector-drive 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 | J8 | J4 | |
| connector-drive 2 | | | |
|----------------------------------+-----+-----| |
| 20-pin data cable | J9 | J5 | |
| connector-drive 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 disabled | SW1/switch 7 | closed |
|---+-------------------------------+--------------+---------|
| » | 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 |
+------------------------------------------------------------+