Dell PowerVault MD3220 - Manual (Page 123)

Configuration: Disk Groups and Virtual Disks 123
3 Perform one of these actions:
• Select Mappings Remove.
• Right-click the virtual disk, and select Remove Mapping from the
pop-up menu.
4 Click Yes to remove the mapping.
Changing the RAID Controller Module Ownership of a Disk Group
You can change the RAID controller module ownership of a a disk group.
You can change the RAID controller module ownership of a standard virtual
disk or a snapshot repository virtual disk. You cannot directly change the
RAID controller module ownership of a snapshot virtual disk because the
snapshot virtual disk inherits the RAID controller module owner of its
associated source virtual disk. Changing the RAID controller module
ownership of a virtual disk changes the preferred RAID controller module
ownership of the virtual disk.
During a virtual disk copy, the same RAID controller module must own both
the source virtual disk and the target virtual disk. Sometimes both virtual
disks do not have the same preferred RAID controller module when the
virtual disk copy starts. Therefore, the ownership of the target virtual disk is
automatically transferred to the preferred RAID controller module of the
source virtual disk. When the virtual disk copy is completed or is stopped,
ownership of the target virtual disk is restored to its preferred RAID controller
module. If ownership of the source virtual disk is changed during the virtual
disk copy, ownership of the target virtual disk is also changed. Under certain
operating system environments, it may be necessary to reconfigure the multi-
path driver before an I/O path can be used.
To change the RAID controller module ownership of a disk group:
1 In the AMW, select the Logical tab and select a disk group.
2 Select Disk Group Change Ownership/Preferred Path.
3 Select the appropriate RAID controller module slot and click Yes to
confirm the selection.
CAUTION: Possible loss of data access – Changing ownership at the disk group
level causes every virtual disk in that disk group to transfer to the other RAID
controller module and use the new I/O path. If you do not want to set every virtual
disk to the new path, change ownership at the virtual disk level instead.
book.book Page 123 Tuesday, June 18, 2013 2:53 PM