SCSI Bus and ID Settings - EXP200 Type 3530 - 1RU, 1RX

SCSI Bus and ID Settings

See > 'Rack and Tower Mode Settings'

When you install a drive CRU in the expansion unit, the drive tray plugs into a printed circuit board called the midplane .
The midplane sets the SCSI bus number and ID automatically, based on the setting of Option Switch 1 and the physical location (bay) of the drive CRU.

Your expansion unit supports up to two external SCSI buses and up to two internal SCSI buses.
Each internal SCSI bus uses five SCSI IDs.
When you install the expansion unit, you can set Option Switch 1 on the ESM board to create two separate five drive SCSI buses, or you can leave it set as one, daisy-chained ten drive SCSI bus.

•  Option Switch 1 set to Off:
   With this default setting, all 10 disk drive bays are on a single SCSI bus.
   The midplane will assign the SCSI IDs for the drive bays in ascending order from
   left to right (rack mode) or from top to bottom (tower mode) as follows:

    0, 1, 2, 3, 4, 8, 9, 1#, 11, 12.

   The system-management SCSI accessed fault tolerant enclosure (SAF-TE) processor uses SCSI ID 15.
   When Option Switch 1 is set to the Off position, you can use either external cable connector.

•  Option Switch 1 set to On:
   When Option Switch 1 is set to the On position, two independent internal five drive SCSI buses are created.
   External SCSI Bus 1 maps to internal SCSI Bus 1 and external SCSI Bus 2 maps to internal SCSI Bus 2.
   The midplane assigns the five internal Bus-1 bays SCSI IDs #, 1, 2, 3, and 4; and the five internal  Bus-2 bays SCSI IDs 0, 1, 2, 3, and 4.
   On each SCSI bus, the system-management processor uses SCSI ID 15.

  -Important Information-
If you are using a ServeRAID software version earlier than Version 3.50, the View Configuration screens might show SCSI IDs or bay numbers.
If the data shown on the View Configuration screen begins with '0', it denotes SCSI IDs.
If the data shown on the View Configuration screen begins with '1', it denotes bay numbers.

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