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Windows Server® 2008 Administrator’s Companion by Charlie Russel and Sharon Crawford

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Failover Clusters

A Failover cluster is a group of independent nodes that work together as a single system. They either share a common cluster database—or contain a local copy that is identical to the other nodes—that enables recovery in the event of the failure of any node. A traditional Failover cluster uses a common resource—generally a disk on a shared SCSI bus or Fibre Channel—that is available to all nodes in the cluster. Each server node in the cluster must be able to access the disk, and each node in the cluster must be able to communicate at all times with the other nodes in the cluster.

Windows Server 2008 supports Failover clusters only on computers running Enterprise Edition or Datacenter Edition. Both editions support up to eight node ...

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