Dell 6 series User Manual page 124

Table 7-5. Physical Disk Failure and Rebuild Issues (continued)
Issue
Rebuilding a physical
disk after one of them is
in a failed state.
A virtual disk fails during
rebuild while using a
global hot spare.
A virtual disk fails during
rebuild while using a
dedicated hot spare.
A physical disk fails
during a reconstruction
process on a redundant
virtual disk that has a
hot spare.
A physical disk is taking
longer than expected to
rebuild.
You cannot add a second
virtual disk to a disk
group while the virtual
disk in that disk group is
undergoing a rebuild
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Troubleshooting
Suggested Solution
If you have configured hot spares, the PERC 6 controller
automatically tries to use one of them to rebuild a physical
disk that is in a failed state. Manual rebuild is necessary if
no hot spares with enough capacity to rebuild the failed
physical disks are available. You must insert a physical disk
with enough storage in the subsystem before rebuilding the
physical disk. You can use the BIOS Configuration Utility
or Dell OpenManage storage management application to
perform a manual rebuild of an individual physical disk.
For information on rebuilding a single physical disk, see
"Performing a Manual Rebuild of an Individual Physical
Disk" on page 108.
The global hot spare goes back to Hotspare state and the
virtual disk goes to Failed state.
The dedicated hot spare goes to Ready state and the virtual
disk goes to Failed state.
The rebuild operation for the inaccessible physical disk
starts automatically after the reconstruction is completed.
A physical disk takes longer to rebuild when under high
stress. For example, there is one rebuild I/O operation for
every five host I/O operations.
The firmware does not allow you to create a virtual disk
using the free space available in a disk group if a physical
disk in a virtual disk group is undergoing a rebuild
operation.