Dell PowerEdge RAID Controller S110 - Manual (Page 44)

42 Troubleshooting
To investigate the cause, check for the following:
• Whether a physical disk in the virtual disk has failed or has gone offline.
Check the status at the Physical Disks field. A Degraded status depends
on the RAID level of the virtual disk and the number of physical disks that
have failed:
–
For a virtual disk at RAID 1 or RAID 5, a single physical disk failure
causes a Degraded status.
– For a virtual disk at RAID 10, the failure of a physical disk in each of
the mirror sets creates a Degraded status for the RAID 10. The failure
of two physical disks in the same mirror set creates a Failed status for
the RAID 10.
• Whether the controller has failed, due to a firmware failure or a
component failure. A failed controller causes a virtual disk not to boot.
For the virtual disk to recover from Degraded status, the failed physical disk
must be replaced and the virtual disk must be rebuilt, using Dell
OpenManage Server Administrator Storage Management. When the rebuild
operation is completed, the virtual disk status changes from Degraded to
Ready. For a description of the rebuild function, see Storage Management,
located on the Dell Support website at dell.com/support/manuals.
WARNING: Found Virtual Disks that are Failed
This warning message appears when at least one virtual disk is in a Failed
state and Pause if Failed is set to ON at the PERC BIOS Configuration
Utility.
The following message appears after the warning is displayed:
--- Press <Enter> to continue, or <Ctrl><R> to enter
setup ---
Press <Enter> to allow the operating system to continue its boot, or press
<Ctrl><R> to enter into the PERC BIOS Configuration Utility to
investigate the cause of the Failed virtual disk.
NOTE: A boot virtual disk that is in a Failed state prevents the operating system
from booting.
To investigate the cause, check for the following:
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