A POWER7 customer using disk adapters with RAID-5 and hot spare has noticed sudden and
significant performance problems with an LPAR. WRKDSKSTS followed by Fl 1 shows the disk
units as “DEGRADED”. The customer has attempted to check the RAID card battery in Service
Tools but it is not listed.
What is the cause of the degraded status?

A.
One of the power supplies in the disk drawer has failed.

B.
The cache battery is in the 90-day replacement warning state.

C.
The pairing of the RAID cards is broken, so the RAID cache is not in use.

D.
The hot spare has taken over for a failed drive and is awaiting replacement.