Preparing Clients; Changing An Isns Server; Deleting An Isns Server; Finishing Up - HP StorageWorks P4000 User Manual

Preparing clients

• Quiesce any applications that are accessing volumes in the cluster.
• Log off the active sessions in the iSCSI initiator for those volumes.

Changing an iSNS server

1. Select the iSNS server to change.
2. Click Edit.
The Edit iSNS Server window opens.
3. Change the IP address.
4. Click OK.

Deleting an iSNS server

1. Select the iSNS server to delete.
2. Click Delete.
A confirmation message opens.
3. Click OK.

Finishing up

1. Click OK when you are finished changing or removing an iSNS server.
2. Reconfigure the iSCSI initiator with the changes.
3. Reconnect to the volumes.
4. Restart the applications that use the volumes.

Troubleshooting a cluster

Auto Performance Protection monitors individual storage system health related to performance issues
that affect the volumes in the cluster.
Repairing a storage system provides a way to replace a failed disk in a storage system and minimize
the time required to bring the storage system back to normal operation in the cluster with fully
synchronized data.

Auto Performance Protection

If you notice performance issues in a cluster, a particular storage system may be experiencing slow
I/O performance, overload, or latency issues. You can identify whether Auto Performance Protection
is operating by checking the storage server status on the storage system Details tab.
Auto Performance Protection is indicated by two unique statuses reported on the Details tab. You will
also receive event notifications on these statuses. For information about setting up event notification,
see "Event notification
• Storage Server Overloaded. The Overloaded status indicates that operations to the storage system
are completing too slowly. During the overloaded state, volume availability is maintained while
182 Working with clusters
overview" on page 129.