HP LH4r HP NetServer FCArray Assistant - Installation and User Guide - Page 136

Running a Device Rebuild

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Chapter 6 Maintenance Processes Figure 6-4. Consistency Check Error Action Message Consistency Check starts and the Consistency Check Status box appears. See Figure 6-5. Figure 6-5. Consistency Check Status Box 6. Close the Logical Drive Information dialog box and continue, or leave the dialog box open until Consistency Check has completed. Running a Device Rebuild If a single device in a fault tolerant system fails, the system is spared data loss by virtue of the striping with parity present across the logical drive (RAID 3, RAID 5) or the total redundancy of data (RAID 1, RAID 0+1). The failed drive needs to be replaced and the failed drive's data must be rebuilt on a new drive to restore the system to fault tolerance once again. The device rebuild function performs this task. A failed drive's data can be rebuilt to: • The original drive if this drive happens to be still functional • A hot spare (standby) drive present for just this purpose, or • A drive inserted in place of the failed drive. 130

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Chapter 6
Maintenance Processes
130
Figure 6-4. Consistency Check Error Action Message
Consistency Check starts and the Consistency Check Status box appears.
See Figure 6-5.
Figure 6-5. Consistency Check Status Box
6.
Close the Logical Drive Information dialog box and continue, or leave the
dialog box open until Consistency Check has completed.
Running a Device Rebuild
If a single device in a fault tolerant system fails, the system is spared data loss by
virtue of the striping with parity present across the logical drive (RAID 3,
RAID 5) or the total redundancy of data (RAID 1, RAID 0+1). The failed drive
needs to be replaced and the failed drive’s data must be rebuilt on a new drive to
restore the system to fault tolerance once again.
The device rebuild function performs this task. A failed drive’s data can be rebuilt
to:
•
The original drive if this drive happens to be still functional
•
A hot spare (standby) drive present for just this purpose, or
•
A drive inserted in place of the failed drive.