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Storage Foundation and High Availability 8.0 Solutions Microsoft Clustering Solutions Guide for Microsoft SQL Server - Windows
- Introducing SFW solutions for a Microsoft cluster
- Planning for deploying SQL Server with SFW in a Microsoft cluster
- Workflows for deploying SQL Server with SFW in a Microsoft cluster
- Configuring SFW storage
- Tasks for configuring InfoScale Storage
- Planning for SFW cluster disk groups and volumes
- Considerations when creating disk groups and volumes for a campus cluster
- Considerations when creating volumes for a DR configuration using Volume Replicator replication
- Viewing the available disk storage
- Creating dynamic cluster disk groups
- Adding disks to campus cluster sites
- Creating dynamic volumes for high availability clusters
- Creating dynamic volumes for campus clusters
- Implementing a dynamic mirrored quorum resource
- Installing SQL Server and configuring resources
- Configuring disaster recovery
- Tasks for configuring the secondary site for disaster recovery for SQL Server
- Verifying the primary site configuration
- Creating a parallel environment for SQL Server on the secondary site
- Volume Replicator components overview
- Setting up security for Volume Replicator
- Creating resources for Volume Replicator
- Configuring Volume Replicator: Setting up an RDS
- Creating the RVG resource
- Setting the SQL server resource dependency on the RVG resource
- Normal Volume Replicator operations and recovery procedures
- Appendix A. Configure InfoScale Storage in an existing Microsoft Failover Cluster
Quorum
The quorum resource maintains the cluster database, as well as critical recovery information, in a recovery log. The quorum resource must be available to all nodes through a SCSI or Fibre Channel bus. With Microsoft clustering alone, the quorum disk must be located on a single physical disk. However, with SFW, the quorum disk can be a mirrored volume that spans multiple disks and cluster nodes.
The quorum resource also determines ownership of the cluster. When a node that is controlling the cluster goes offline, other nodes use a challenge/defense protocol to determine which node can have control of the quorum resource and the cluster.