Disk Device Groups

Add this planning information to the Disk Device Group Configurations Worksheet.

You must configure all volume-manager disk groups as Sun Cluster disk device groups. This configuration enables a secondary node to host multihost disks if the primary node fails. Consider the following points when you plan disk device groups.

• Failover – You can configure multiported disks and properly configured volume-manager devices as failover devices. Proper configuration of a volume-manager device includes multiported disks and correct setup of the volume manager itself. This configuration ensures that multiple nodes can host the exported device. You cannot configure tape drives, CD-ROMs, or single-ported disks as failover devices.

• Mirroring – You must mirror the disks to protect the data from disk failure. See Mirroring Guidelines for additional guidelines. See Installing and Configuring Solstice DiskSuite/Solaris Volume Manager Software or SPARC: Installing and Configuring VxVM Software and your volume-manager documentation for instructions on mirroring.

For more information about disk device groups, see “Devices” in Sun Cluster Overview for Solaris OS and Sun Cluster Concepts Guide for Solaris OS.