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Table 6. Firmware Error Codes. (continued)

Error Code Description Action/

Possible Failing FRU

2100 0002 Unsupported SCSI bus mode - high voltage

differential

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.

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.

2100 0004 Cannot determine SCSI bus mode Before eplacing any system components,