Changing Controller Ownership Of The Virtual Disk; Removing Host-To-Virtual Disk Mapping; Changing The Raid Controller Module Ownership Of A Disk Group - Dell PowerVault MD3260i Administrator's Manual

6. In the Change Mapping dialog, click Yes to confirm the changes.
The mapping is checked for validity and is saved. The Defined Mappings pane is updated to reflect the new
mapping. The object tree is also updated to reflect any movement of host groups or hosts.
7. If a password is set on the storage array, the Enter Password dialog is displayed. Type the current password for the
storage array, and click OK.
8. If configuring a Linux host, run the rescan_dm_devs utility on the host, and remount the virtual disk if required.
NOTE: This utility is installed on the host as part of the MD Storage Manager install process.
9. Restart the host applications.

Changing Controller Ownership Of The Virtual Disk

If the host has a single data-path to the MD storage array, the virtual disk must be owned by the controller to which the
host is connected. You must configure this storage array before you start I/O operations and after the virtual disk is
created. 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 ownership of the virtual disk to the connected controller:
1. In the AMW, select the Storage & Copy Services tab and select a virtual disk.
2. From the menu bar, select the appropriate RAID controller module slot in Storage → Virtual Disk → Change →
Ownership/Preferred Path.
3. Click Yes to confirm the selection.

Removing Host-To-Virtual Disk Mapping

To remove the host to virtual disk mapping:
1. In the AMW, select the Host Mappings tab.
2. Select a virtual disk under Defined Mappings.
3. Perform one of these actions:
– From the menu bar, select Host Mappings → LUN Mapping → Remove.
– Right-click the virtual disk, and select Remove 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 disk group. You can also change the RAID controller module
ownership of a standard virtual disk or a snapshot repository virtual disk. You cannot directly change the RAID controller
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