Dell PowerVault NX1950 Installation And Troubleshooting Manual

Also see for PowerVault NX1950: Deployment guide Important information Getting started Installation guide Deployment guide

Dell PowerVault NX1950 Installation And Troubleshooting Manual Manual pdf 45 page image

Strategies for Backup and Recovery 45Strategies for Backup and RecoveryYou can use the backup and recovery solutions available with the Dell|Equallogicto ensure high availability for your Dell™ PowerVault™ NX1950 cluster solution.The following sections address these areas and present possible solutions.Protecting Cluster DataThere are four specific areas to protect with backups to ensure highavailability for your cluster nodes:• Cluster disk signatures and partitions.Before you begin to backup any data on the cluster nodes, make sure youbackup the cluster disk signatures and partitions using the AutomatedSystem Recovery in the Backup Wizard for Windows. If you have torestore the signature of the quorum disk later, it is critical to have a copyfrom which to restore. For example, you must restore the signature of thequorum disk if you experience a complete system failure and the signatureof the quorum disk changed since the last backup.• Cluster quorum resource.When you backup data on a cluster node, make sure you also backup thequorum resource. The quorum resource is important because it containsthe current cluster configuration, application registry checkpoints, and thecluster recovery log.• Shared disks.To back up all shared disks owned by a node, perform a full backup fromthat node. If a shared disk owned by the node that is being backed up failsover to another node during the backup process, the backup set does notcontain a full backup of that disk.• Data on the individual cluster nodes.After you back up the quorum resource on one node, it is not necessary toback up the quorum resource on the remaining cluster nodes. However,you may want to back up the clustering software, cluster administrativesoftware, system state, and application data on the remaining nodes.NOTE: If you back up the system state for a node, you also automatically back upthe quorum data if the cluster service is running on that node.