9.5.01 HP P4000 SAN Solution User Guide (AX696-96168, February 2012)

Maintaining storage systems in clusters
Use the Edit Cluster menu to perform cluster maintenance tasks such as increasing capacity by
adding a storage system, upgrading the cluster by swapping in new storage systems, or updating
cluster VIPs and iSNS servers when necessary.
Adding a new storage system to a cluster
Add a new storage system to an existing cluster to expand the storage for that cluster. If the cluster
contains a single storage system, adding a second storage system triggers a change for the volumes
in the cluster to go from Network RAID 0 to Network RAID 10, which offers better data protection
and volume availability. The window which opens describes the data protection offered by this
change, and allows you to override the change for selected volumes, if necessary.
NOTE: Adding a storage system to a cluster causes a restripe of the data in that cluster. A restripe
may take several hours or longer.
Adding a new storage system is not the same as replacing a repaired storage system with a new
one. If you have repaired a storage system and want to replace it in the cluster, see “Repairing a
storage system” (page 139).
Prerequiste
First add the storage system to the management group that contains the cluster.
To add a storage system
1. Select the cluster in the navigation window.
2. Click Cluster Tasks, and select Edit Cluster→Add Storage Systems.
If there are no storage systems in the management group available to add to the cluster, the
Add Storage Systems menu item will be disabled.
3. Select one or more storage systems from the list.
4. Click OK.
5. Click OK again in the Edit Clusters window.
A confirmation message opens, describing the restripe that happens when a storage system
is added to a cluster.
6. Click OK to confirm adding the storage system to the cluster.
Upgrading the storage systems in a cluster using cluster swap
Use cluster swap to upgrade all the systems in a cluster at one time. Using cluster swap allows
upgrading the cluster with only one restripe of the data.
Prerequisite
Add the storage systems to swap to the management group that contains the cluster.
To swap storage systems
1. Select the cluster in the navigation window.
2. Click Cluster Tasks, and select Edit Cluster→Swap Storage Systems.
3. Select from the list all the storage systems to remove from the cluster and click Remove Storage
Systems.
The selected storage systems disappear from the list.
4. Click Add Storage Systems.
The Add Storage Systems to Swap window opens with all the available storage systems in
the management group.
136 Working with clusters