Adhering to Quorum Device Requirements

You must adhere to the following requirements. If you ignore these requirements, you might compromise your cluster's availability.

• Ensure that Sun Cluster software supports your specific device as a quorum device.

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  Note –

  For a list of the specific devices that Sun Cluster software supports as quorum devices, contact your Sun service provider.

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  Sun Cluster software supports two types of quorum devices:

  • Multihosted shared disks that support SCSI-3 PGR reservations

  • Dual-hosted shared disks that support SCSI-2 reservations

• In a two–node configuration, you must configure at least one quorum device to ensure that a single node can continue if the other node fails. See Figure 3–2.

For examples of quorum configurations to avoid, see Bad Quorum Configurations. For examples of recommended quorum configurations, see Recommended Quorum Configurations.