IBM RS/6000 Enterprise Server M80 Service Manual page 218

Table 6. Firmware Error Codes. (continued)
Error Code Description
2100 0002 Unsupported SCSI bus mode - high voltage
differential
2100 0004 Cannot determine SCSI bus mode
200
Service Guide
Action/
Possible Failing FRU
Before eplacing any system components,
refer to the notes in error code 21A0 0xxx.
1. Disconnect the SCSI cable from the SCSI
controller the location code identifies and
reboot the system.
2. If the error code persists, replace the
SCSI controller (or I/O planar if SCSI
controller is integrated).
3. Reconnect the SCSI cable disconnected
in step 1, and remove all the SCSI
devices attached to the cable and reboot
the system.
4. If the error code persists, replace the
SCSI cable.
5. One at a time, reconnect the SCSI
devices disconnected in step 3. If the
error code returns, replace the last SCSI
device you reconnected.
If all SCSI devices have been reattached and
the error code has not been returned, there
may have been a bad connection. Go to
"MAP 0410: Repair Checkout" in the
RS/6000 and Eserver pSeries Diagnostic
Information for Multiple Bus Systems.
Before eplacing any system components,
refer to the notes in error code 21A0 0xxx.
1. Disconnect the SCSI cable from the SCSI
controller the location code identifies and
reboot the system.
2. If the error code persists, replace the
SCSI controller (or I/O planar if SCSI
controller is integrated).
3. Reconnect the SCSI cable disconnected
in step 1, and remove all the SCSI
devices attached to the cable and reboot
the system.
4. If the error code persists, replace the
SCSI cable.
5. One at a time, reconnect the SCSI
devices disconnected in step 3. If the
error code returns, replace the last SCSI
device you reconnected.
If all SCSI devices have been reattached and
the error code has not been returned, there
may have been a bad connection. Go to
"MAP 0410: Repair Checkout" in the
RS/6000 and Eserver pSeries Diagnostic
Information for Multiple Bus Systems.