Administrator Guide

Managing host groups
A host group is a logical entity of two or more hosts that share access to specific virtual disks on the storage array. You create host
groups using the MD Storage Manager.
All hosts in a host group must have the same host type (operating system). In addition, all hosts in the host group must have special
software, such as clustering software, to manage virtual disk sharing and accessibility.
If a host is part of a cluster, every host in the cluster must be connected to the storage array, and every host in the cluster must be added
to the host group.
Creating a host group
To create a host group:
1. In the AMW, select the Host Mappings tab.
2. In the object tree, select the storage array or the Default Group.
3. Perform one of the following actions:
• From the menu bar, select Host Mappings > Define > Host Group.
• Right-click the storage array or the Default Group, and select Define > Host Group from the pop-up menu.
The Define Host Group window is displayed.
4. Type the name of the new host group in Enter new host group name.
5. Select the appropriate hosts in the Select hosts to add area.
6. Click Add.
The new host is added in the Hosts in group area.
NOTE: To remove hosts, select the hosts in the Hosts in group area, and click Remove.
7. Click OK.
Adding a host to a host group
You can add a host to an existing host group or a new host group using the Define Host Wizard. For more information, see Defining A
Host.
You can also move a host to a different host group. For more information, see Moving A Host To A Different Host Group.
Removing a host from a host group
You can remove a host from the object tree on the Host Mappings tab of the AMW. For more information, see Removing A Host Group.
Moving a host to a different host group
To move a host to a different host group:
1. In the AMW, select the Host Mappings tab, select the host node in the object tree.
2. Perform one of these actions:
• From the menu bar, select Host Mappings > Host > Move.
• Right-click the host node, and select Move from the pop-up menu.
The Move Host dialog is displayed.
3. In the Select host group list, select the host group to which you want to move the host.
You can also move the host out of the host group and add it under the default group.
The Move Host confirmation dialog is displayed.
4. Click Yes.
The host is moved to the selected host group with the following mappings:
• The host retains the specific virtual disk mappings assigned to it.
• The host inherits the virtual disk mappings assigned to the host group to which it is moved.
• The host loses the virtual disk mappings assigned to the host group from which it was moved.
About your host
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