Hi,
from the CLI of Server, u can run the command show hardware .you should get output which has
Device Present
================
Virtual Drives : 2
Degraded : 1
Offline : 0
Physical Devices : 5
Disks : 4
Critical Disks : 2
Failed Disks : 1
Check for the failed disks.Ideally ,it should be Zero.
Open the TAC case so that IBM engr. can be aligned for furhter troubleshooting.
regds,
aman