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 multihost disks and properly configured volume-manager devices as failover devices. Proper configuration of a volume-manager device includes multihost 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 devices 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 or Solaris Volume Manager Software or SPARC: Installing and Configuring VxVM Software and your volume-manager documentation for instructions about mirroring.