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Legato NetWorker, Release 7.0
Disaster Recovery Guide
6
Replacing the Quorum Disk and Recovering Its Data
116
Replacing the Quorum Disk and Recovering Its Data
This section provides information about the quorum resource and explains
how to recover a quorum disk’s data.
About the Quorum Resource
If there is a communication failure between the nodes, the MSCS software uses
the quorum resource in an arbitration process to determine the members of the
cluster nodes. The quorum resource also records changes made to the cluster
database when one of the nodes in the cluster is down.
Refer to the Microsoft Cluster Server documentation for detailed information
on how to:
• Locate the quorum disk
• Locate the quorum data directory
• Change the quorum disk designation
Recovering the cluster configuration data on the quorum disk is important
during a disaster recovery. Recovery of the quorum resource information is not
automatic.
If the quorum disk is owned by a virtual server, configure the virtual server as
a NetWorker client. For the client’s Save Set attribute, specify one of the
following:
• All
• The disk volume or directory that contains the quorum data
If the quorum disk is not owned by a virtual server, configure all the nodes as
NetWorker clients. For the Save Set attributes, specify one of the following:
• All (this is preferred)
• The disk volume or directory that contains the quorum data
Note: The quorum disk is accessible from only one node at a time. Therefore,
the backup will fail over to the node that does not have access to the quorum
disk. This is why specifying save set All is preferred over specifying the disk
volume or directory that contains the quorum data.