Can I use disks configured for SCSI-3 PGR as global devices?
Currently, SCSI-3 PGR is not supported in Sun Cluster. Only SCSI-2 semantics are supported for global disk devices. Since SCSI-3 disks are not supported, you must use the -R option to scdidadm(1M) to set the correct SCSI semantics for any SCSI-3 disks that you want to use as global devices in a cluster.