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The shared disks in an Exchange 2000 cluster are a critical part of the cluster technology. A cluster's shared disk resources include the quorum disk resource and the resource that contains Exchange 2000 databases. Any of the nodes in a cluster can access the shared disks, and all nodes rely on those disks to be intact.
If a cluster's shared disk fails, any new node that joins a cluster will not be able to access the necessary data from the failed shared disk.
If you use the "restore the server" method to recover your shared disk resources, do not include the drives for those resources in your full computer backup set.
To back up your quorum disk resource, perform either a full computer backup or a Windows backup on the node that owns the quorum disk resource.
To back up the Exchange 2000 databases and log files on your cluster's shared disks, perform a separate backup set using the Microsoft Information Store option in Backup. For more information about the "restore the server" method, see "Restoring the Server".
Important When you create backup sets of your cluster node that contains a cluster's shared disk, you should also back up any dynamic data that exists on that disk.
Backing Up the Quorum Disk Resource
The quorum disk resource maintains the consistency of your cluster. For example, the quorum disk resource ensures that the cluster databases (which reside in the Windows registries of each node in the cluster) are consistent.
The cluster databases contain information about all physical and logical elements in a cluster, including cluster objects properties, configuration data, and so on.
The quorum disk resource contains all of the files necessary to maintain the consistency of your cluster. For example, the quorum disk resource contains the quorum log file (Quolog.log), and uses this file to ensure that the cluster registries on all nodes of the cluster are consistent. The cluster registry for each node is located in the %systemroot%\Cluster\CLUSDB directory of each node.
Note You should create a separate cluster group for your quorum disk resource and keep it on its own physical hard disk. For more recommendations about Exchange cluster groups, see Exchange 2000 Server Clusters.
Quorum disk resource files are located in the Microsoft Windows Cluster Server (MSCS) folder of the drive that contains the quorum disk resource. When you back up the quorum disk resource, the following files are also backed up:
To back up the quorum disk resource
After you create the backup set for the node that owns the quorum disk resource, label that backup set in order to remember that it is the backup set that contains your quorum disk resource. If a disaster occurs that requires you to rebuild an entire cluster, you must first restore the node that owned the quorum disk resource. By first restoring the node that owned the quorum disk resource, you ensure that objects in the cluster are properly re-created before introducing new nodes into the cluster. For detailed information about how to restore the quorum disk resource, see "Restoring a Quorum Disk Resource".
Note Although the node's local cluster registry hive is not backed up in a full computer backup set or Windows backup set, you can back it up using the Registry Backup tool (Regback.exe) in the Microsoft Windows NT Resource Kit. For more information about how to back up a node's local cluster registry, see the Microsoft Knowledge Base article Q257892, "Emergency Repair Disk Does Not Create Cluster Configuration Database" (http://go.microsoft.com/fwlink/?LinkId=3052&ID=257892).
The information in this article applies to:
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