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3. To create an array manually, select the desired disks and then
click Create. In the window displayed, enter the array name,
select the array type, and select local disks. Click Apply to
complete the setup. Note that no hot spare disk will be created
automatically. Make sure all disks are selected to create array(s);
otherwise, disk space will be wasted (because disks that are not
selected will not be used for storage).
12.2.3 Rebuilding an Array
By checking array status, you can determine whether maintenance is
necessary.
NOTE!
To be alerted when an array is degraded or damaged, you
can configure alarm-triggered action at Alarm > Alert.
An array is in one of four statuses: normal, degraded, damaged,
rebuild. The status is normal if no physical disk is lost. When the
number of physical disks lost reaches the specified value, the array is
considered damaged. The status between normal and damaged is
degraded. A degraded array can be recovered to normal status
through rebuilding.
NOTE!
Take RAID 5 that consists of 4 disks as an example. The
array is degraded when one disk is lost. When two disks are
lost, the array is damaged.
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