MAP 3351

Use the following to determine what other Field Replaceable Units (FRUs) besides a disk, may need to be replaced in order to solve a problem.

You are sent here when an Advanced Function disk, a physical disk in 528 bytes/sector format, was identified as the primary FRU to replace in order to resolve a problem. However, if replacing the disk did not resolve the problem then other FRUs may need to be replaced.

Considerations:

Remove power from the system before connecting and disconnecting cables or devices, as appropriate, to prevent hardware damage or erroneous diagnostic results.
Some systems have SAS and PCI-X bus interface logic integrated onto the system boards and use a pluggable RAID Enablement Card (a non-PCI form factor card) for these SAS/PCI-X busses. For these configurations, replacement of the RAID Enablement Card is unlikely to solve a SAS fabric related problem since the SAS interface logic is on the system board.

Attention: Replacing RAID adapters is not recommended without assistance from your service support organization when SAS fabric problems exist. Because the adapter may contain non-volatile write cache data and configuration data for the attached disk arrays, additional problems can be created by replacing a adapter when SAS fabric problems exist.

Attention: Removing functioning disks in a disk array is not recommended without assistance from your service support organization. A disk array may become Degraded or Failed if functioning disks are removed. Also, additional problems may be created.

Step 3351–1

Identify the SAS fabric on which the problem is occurring by examining the error log entry.

Go to Step 3351–2.

Step 3351–2

While the error persists, replace the components of the failing SAS fabric in the following order.

Cable (if present)
Adapter (if SAS interface logic is on the adapter) or system board (if SAS interface logic is on the system board)
DASD backplane (if present)

To replace a component and see if the problem was corrected, do the following:

Power off the system or logical partition
Replace a component listed above
Power on the system or logical partition.
If you cannot power on normally, boot to Rescue mode. Examine the error log.

When the problem is resolved then go to MAP 0410: Repair Checkout, in RS/6000 pSeries Diagnostic Information for Multiple Bus Systems.