IBM EXP15, Инструкция по установке и эксплуатации

Страница: 65 / 124

Working with Internal Disk Drives
Drive Numbering
There are two SCSI channels (1, 2) in the expansion unit. Each
channel uses five SCSI ID numbers. Each disk drive within the
expansion unit has a unique channel number and SCSI ID number,
based on its physical location in the expansion unit.
When a drive is plugged into the midplane, its channel number and
SCSI ID are set automatically. See the following illustration for bus
and SCSI ID values when option switch 1 is set to the ON (up) state.
Use the option switch on the ESM board to change the ID settings.
(1,0) (2,0) (1,1) (2,1) (1,2) (2,2) (1,3) (2,3) (1,4) (2,4)
The first number represents the channel number and the second is
the SCSI ID.
Important information for IBM ServeRAID users:
The view configuration screens show bay numbers, not SCSI IDs.
To calculate the bay number, add 1 to the SCSI ID.
Attention: A blank label is provided in each drive tray behind the
drive latch. Use this label to record the address location information
for each drive before you remove it. Also, record the address
location information in Table 5 on page 75. (If you install a drive
in the wrong bay, you will lose data.)
Chapter 4. Installing and Replacing Devices
39