Quorum Guidelines

Use the following guidelines when setting up quorum devices:

• Establish a quorum device between all nodes that are attached to the same shared disk storage enclosure. Add one disk within the shared enclosure as a quorum device to ensure that if any node fails, the other nodes can maintain quorum and master the disk device groups on the shared enclosure.

• You must connect the quorum device to at least two nodes.

• A quorum device can be any SCSI-2 or SCSI-3 disk used as a dual-ported quorum device. Disks connected to more than two nodes must support SCSI-3 Persistent Group Reservation (PGR) regardless of whether the disk is used as a quorum device. See the chapter on planning in the Sun Cluster 3.1 Software Installation Guide for more information.

• You can use a disk that contains user data as a quorum device.