User`s guide

Chapter 5
Manual Rebuild of a Drive (Reconstruction)
A rebuild is a process of recreating data on a new drive in a configuration with a
redundant RAID level (for example, RAID 1, RAID 0 + 1, and RAID 5). If your
logical RAID drive was configured with a RAID level that does not support data
redundancy, all data is lost if a drive fails.
There are three ways to rebuild a drive.
With a Hot Spare
If you defined a spare drive, when a SCSI drive fails, the RAID controller
automatically starts to rebuild the information on a hot spare. A hot spare is set to
write only so data is not corrupted during the rebuild.
With a Hot Swap
If you replace a drive while the RAID subsystem is operating and you enabled the
Fault Management option (as described earlier in this chapter) the RAID controller
automatically starts the rebuild. This operation is called a hot swap.
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It may take up to one minute for the automatic rebuild to begin.
For a Manual Rebuild
You can rebuild a SCSI drive that you failed manually or a drive that could not be
rebuilt because either an automatic rebuild is in progress or the Fault Management
option was not enabled.
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