HP StorageWorks SAN Virtualization Services Platform Manager user guide (AG781-96017, March 2009)

4. Click Add. The host you selected appears in the lower area of the screen. If you want to deselect
the host, select the host in the lower area and click Remove.
5. Click the Permission field for the host.
6. Select one of the following from the dropdown list:
• Full—Assigns read/write permission to the host.
• Read—Assigns read-only permission to the host.
• None—Assigns no permission to the host.
7. If required, repeat steps 3 through 6 to change permission for additional hosts.
8. Click Next. A confirmation screen appears.
9. Click Finish. The host permission is changed for the VDG.
Removing host permissions
You can remove permission from a host that currently has permission to access the VDG.
To remove a host’s permission for a snapshot:
1. Right-click the VDG.
2. Select Manage > Manage Permission > Remove Host Permission. The Remove Host Permission
wizard opens to the Select host(s) screen.
3. Select a host whose permission you want to remove.
4. Click Add. The host you selected appears in the lower area of the screen. If you want to deselect
the host, select the host in the lower area and click Remove.
5. Click Next. A confirmation screen appears.
6. Click Finish. The host’s permission to access the VDG is removed.
Managing active and primary DPMs for a VDG
All members of a VDG that are permitted to access hosts that are connected to the SAN through DPMs
must be active on the same DPM.
When you add a virtual disk or snapshot to a VDG that is currently active on a different DPM to the
rest of the VDG members, the virtual disk or snapshot is added to the VDG successfully and failed
over to the active DPM of the other VDG members. The primary and secondary DPM settings of the
new member also change to be the same as the other VDG members.
You can:
• Change the primary and secondary DPMs for the VDG
• Change the active DPM for the VDG
Changing the primary and secondary DPM for a VDG
To change the primary and secondary DPM for a VDG:
1. Right-click the VDG.
2. Select Manage > Manage Data Path Module > Change Primary/Secondary Data Path
Module/VSM. The Change Primary/Secondary Data Path Module/VSM wizard opens to the Set
preferred path screen.
Working with virtual disk groups140