Dell PowerEdge RAID H700 User Manual page 145

Table 9-4. Physical Disk Failure and Rebuild Issues
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
Corrective Action
If you have configured hot spares, the PERC H700 or
PERC H800 card 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 111.
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.
(continued)
Troubleshooting
145