Fujitsu PRIMEQUEST 1000 Series User Manual page 868

SV RAID:%2 Device error (State change on disk from hot spare to offline)
Meaning:
The HDD state changed from HotSpare to offline.
%2: Device name
Corrective action:
Replace the offline HDD. Perform a rebuild. For multi-dead, take corrective
action according to the multi-dead recovery procedure.
(HotSpare is not supported.)
Severity:
Warning
Action:
(R/M/T/S)
28564
SV RAID:%2 Device error (State change on disk from offline to failed)
Meaning:
The HDD state changed from offline to failed.
%2: Device name
Corrective action:
Replace the failed HDD. Perform a rebuild.
Severity:
SVmco User Guidel
860