Dell PowerEdge RAID Controller S110 - Manual (Page 45)

Troubleshooting 43
• Determine if a single or multiple physical disks in a non-redundant virtual
disk have failed. If yes, data is lost. Recover the lost data from a backup
storage source.
• Determine if two or more physical disks in a redundant virtual disk have
failed. If yes, data is lost. Recover the lost data from a backup storage
source.
NOTE: For RAID 10, if a single physical disk fails in each mirrored set, the
redundant virtual disk goes to a Degraded status but data is not lost. If two physical
disks fail in one of the mirrored sets, the redundant virtual disk goes to a Failed
status and data is lost.
WARNING: Found Virtual Disks that are Degraded and Failed
This warning message appears when multiple virtual disks are in Degraded
and Failed state and Pause if Degraded or Pause if Failed are 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 Degraded and Failed virtual disks.
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:
• Whether the virtual disk is in Degraded status because one of the physical
disks of a RAID 1 or RAID 5 virtual disk has failed, or one of the physical
disks of a RAID 10 virtual disk has failed.
Press <Ctrl><R> and verify if the physical disks are offline or missing.
Remove and replace a failed physical disk. A second physical disk failure
could cause a Degraded virtual disk to change to Failed status.
• Whether the virtual disk is in a Failed status because one or more of the
physical disks have failed.
Press <Ctrl><R> and verify if the physical disks are offline or missing.
Remove and replace the failed physical disk or disks.
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