Dell PowerVault 775N (Rackmount NAS Appliance) - Manual (Page 30)

The status of the array disk must be Ready and the type must be Spare Array Disk.
Unassign 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.
The Unassign Global Hot Spare command unassigns the hot-spare disk. To unassign the hot-spare disk, perform the
following steps:
1. Right-click the disk that is assigned as a hot spare.
2. Click Unassign Global Hot Spare.
3. Confirm the successful completion of the operation by checking the properties displayed in the right pane.
The status of the array disk must be Ready and the type must be Array Disk.
Prepare to Remove
Use this procedure to prepare for removing an array disk from a controller.
NOTICE: To prevent data loss, Dell recommends that you perform this operation before you remove any physical disk
from an enclosure.
1. Right-click the disk that you want to remove.
2. Click Prepare to Remove, and then click OK to continue.
When the lights on the disk you have prepared to remove stop blinking, the disk is ready to be physically removed. The
disk will not be listed in the array group.
Properties
Use this command to display the array disk properties.
General Controller Commands
This section describes the general controller operations.
Rescan Controller
The Rescan Controller command can be used to check whether any new disks were attached after a configuration was set.
To rescan the controller, perform the following steps:
1. Right-click the controller you want to rescan.
2. Click Rescan Controller.