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

Prerequisites
• Disconnect any hosts or servers that are accessing volumes in the management group.
• Wait for any restriping of volumes or snapshots to complete.
• Stop managers on storage systems that you plan to remove from the management group. You
may want to add a FOM or start a Virtual Manager on a different storage system to maintain
quorum and the best fault tolerance. See “Stopping managers” (page 116).
Shut down the management group
1. Log in to the management group that you want to shut down.
2. Click Management Group Tasks on the Details tab, and select Shut Down Management Group.
3. Click Shut Down Group.
If volumes are still connected to servers or hosts
After you click Shut Down Group, a confirmation window opens, listing volumes that are still
connected and that will become unavailable if you continue shutting down the management group.
Figure 50 Notification of taking volumes offline
1. Stop server or host access to the volumes in the list.
2. Click Shut Down Group.
Start the management group back up
When you are ready to start up the management group, simply power on the storage systems for
that group.
1. Power on the storage systems that were shut down.
2. Use Find in the CMC to discover the storage systems.
When the storage systems are all operating properly, the volumes become available and can
be reconnected with the hosts or servers.
Restarted management group in maintenance mode
In certain cases the management group may start up in maintenance mode. Maintenance mode
status usually indicates that either the management group is not completely restarted or the volumes
are resynchronizing. When the management group is completely operational and the
resynchronizing is complete, the management group status changes to normal mode.
Some situations which might cause a management group to start up in maintenance mode include
the following:
• A storage system becomes unavailable, and the management group is shut down while that
storage system is repaired or replaced. After the storage system is repaired or replaced and
118 Working with management groups