User Guide

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Marvell RAID Utility User Guide
Using the Software 2-23
2.5 Rebuilding a Logical Drive
The MRU can rebuild the logical drive by reconstructing data from a failed drive onto one of
its spare physical drives. Rebuilding is available for logical drives created using RAID level 1
and 10, which have the capability of mirroring data.
RAID 0 excludes rebuild capabilities. Therefore, the entire stripe is lost if one of the physical
drive fails.
When a logical drive fails and is degraded, you are notified in two ways:
 Triggering of the alarm. You can turned it off in the Adapters window.
 Displaying the logical drive red icon with a warning symbol next to it.
You have the option to rebuild the logical drive either automatically or manually. To use the
auto-rebuild process, there must be a spare drive available. Go to the Physical Drive Details
window to set a physical drive as a spare. Any physical drive that is fully or partially
configured cannot be set as a spare drive.
2.5.1 Auto-Rebuild
If the Auto-Rebuild option is on when creating the logical drive, the rebuilding process begins
automatically if there is a degraded drive.
2.5.2 Manual Rebuild
Follow these steps to manually rebuild a logical drive:
1. Start the MRU.
2. Click the Physical Drives tab, and then select a physical drive as the target spare drive.
3. Click the Logical Drives tab, and then select the logical drive to rebuild.
4. Click REBUILD.
The Event Log pane displays the rebuilding status.