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IBM-AUSTRIA - PC-HW-Support 30 Aug 1999 |
SCSI IDs (Netfinity 7000 - 8651)
SCSI IDs
Each SCSI device that is connected to an
individual integrated SCSI controller needs a unique
identification (ID) so that the controller can identify the
devices and ensure that different devices do not attempt to
transfer data at the same time. (The integrated SCSI
controllers on the system board operate independently.) If
you need to set IDs for SCSI devices, refer to the
instructions that come with those devices.
The server automatically sets SCSI IDs for hot-swap hard
disk drives, according to the jumper settings on the SCSI
backplanes. The server uses the hard disk drive SCSI IDs
to send status information to the indicator lights above
each hot-swap bay.
Each of the two SCSI backplanes in the server supports
one bank (six) of hot-swap bays. Table 8 shows the
default SCSI IDs that the backplanes assign for hot-swap
hard disk drives.
Table 8. Automatically Assigned SCSI IDs
| Bank |
A |
A |
A |
A |
A |
A |
B |
B |
B |
B |
B |
B |
| Bay |
1 |
2 |
3 |
4 |
5 |
6 |
1 |
2 |
3 |
4 |
5 |
6 |
| ID |
0 |
1 |
2 |
3 |
4 |
5 |
0 |
1 |
2 |
3 |
4 |
5 |
NOTE: The default SCSI ID for each SCSI backplane is 15.
The default SCSI ID for each SCSI controller is 7.
You can change the default ID addresses of the drives by
changing the jumper settings on the SCSI backplane.
The processing sequence for SCSI devices is set through
the SCSISelect Utility program (refer to the SCSI
information provided on the System CD-ROM for more
information). The sequence proceeds from the lowest
SCSI ID to the highest (0 to 6, then 8 to 15).
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