Dell PowerVault 775N (Rackmount NAS Appliance) - Manual (Page 29)

1. Right-click the array disk that you want to initialize.
2. Click Initialize.
The status of the disk displays Initializing in the right pane until the operation is finished.
Format
The Format command performs a low-level formatting of the array disk. To format the array disk, perform the following
steps:
1. Right-click the disk that you want to format.
2. Click Format.
The right pane shows the status of the format. The status displays Formatting until the operation is finished.
Rebuild
The Rebuild command is enabled only when a disk has failed. You can rebuild only on failed disks in redundant arrays (RAID
1 or RAID 5) by performing the following steps:
1. Right-click the failed disk that you want to rebuild.
2. Click Rebuild.
In the right pane, the status of the disk is Rebuilding and a progress bar shows the percentage of completion.
NOTE: This process may take several hours.
Assign Global Hot Spare
NOTE: This procedure does not apply to the PERC 3/Di controller, which is the integrated RAID controller on
PowerVault 775N NAS systems.
A hot spare is an unused backup disk that is part of the array group. Hot spares remain in standby mode. When an array disk
in a virtual disk fails, the assigned hot spare will be activated to replace the failed array disk without interrupting the system
or requiring your intervention.
You can change the hot-spare disk assignment by unassigning a disk and choosing another disk to assign, as needed.
To assign a global hot spare, perform the following steps:
1. Right-click the array disk that you want to use as a hot spare.
2. Click Assign Global Hot Spare.
The Assign Hot Spare dialog box appears.
3. Confirm the successful completion of the operation by checking the properties displayed in the right pane.