Dell PowerVault 770N (Deskside NAS Appliance) - Manual (Page 27)

The virtual disk disappears from the right pane.
Reboot your system after deleting a virtual disk and before creating new virtual disks.
Reconfiguring and Managing Virtual Disks
This section summarizes how you can change the virtual disk configuration through the NAS Manager.
NOTE: Because of hardware restrictions, the PERC 3/DC, 3/QC, and 4/DC controllers do not detect a drive status
change until you attempt to read from or write to the drive. For example, when an unconfigured drive is removed, the
controller does not detect the change until a you perform a manual rescan or read/write to the drive.
Reconfiguring a Virtual Disk
Perform the following steps to add array disks to a virtual disk or to change the virtual disk's RAID level.
NOTE: The NAS system supports RAID 1 to RAID 0 and RAID 5 to RAID 0 migrations.
1. Right-click a virtual disk.
2. Click Reconfigure.
The Virtual Disk Reconfiguration dialog box appears. The available disks are listed in the left pane. You can choose
appropriate disks to add by selecting them and using Add Disk to move them to the right pane.
3. Select the RAID level in the Type drop-down menu.
4. Click OK to continue or Cancel to cancel the operation.
5. To view your progress, click the parent of the virtual disk.
The status of the virtual disk will be Reconstructing, and progress information displays until the Add Member
operation is finished. At the end of the operation, the Type category shows the changed RAID level.
Using Change Policy
To change the cache policies of a virtual disk, perform the following steps:
1. Right-click a virtual disk.
2. Click Change Policy.
The Virtual Disk Change Policy dialog box displays.
3. From the pull-down menu, choose the policies you want.
You can enable or disable the write-cache or enable or disable the read-cache.
NOTE: The write-cache is enabled by default. Disabling write-cache may negatively impact your system's
performance.