Dell MD3220, MD3200 owner manual Modifying and Removing Host-to-Virtual Disk Mapping, 121

Modifying and Removing Host-to-Virtual Disk Mapping

You can modify or remove a host-to-virtual disk mapping for several reasons, such as an incorrect mapping or reconfiguration of the storage array. Modifying or removing a host-to-virtual disk mapping applies to both hosts and host groups.

To modify or remove host to virtual disk mapping:

NOTE: Before you modify or remove a host-to-virtual disk mapping, you must stop any data access (I/O) to the virtual disks to prevent data loss.

1In the AMW, select the Mappings tab.

2In the Defined Mappings pane, perform one of these actions:

•Select a single virtual disk, and select Mappings→ Change→ Mapping.

•Right-click the virtual disk, and select Change Mapping from the pop-up menu.

3In Host group or host, select the appropriate host group or host.

By default, the drop-down list shows the current host group or the host associated with the selected virtual disk.

4In Logical unit number, select the appropriate LUN.

The drop down list shows only the currently available LUNs that are associated with the selected virtual disk.

5Click OK.

Stop any host applications associated with this virtual disk, and unmount the virtual disk, if applicable, from your operating system.

6In 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 display the new mapping. The Topology pane is also updated to reflect any movement of host groups or hosts.

NOTE: 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.

7If configuring a Linux host, run the rescan_dm_devs utility on the host, and remount the virtual disk if required. This utility is installed on the host as part of the MDSM install process.

Configuration: Disk Groups and Virtual Disks

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