Cluster Storage FAQ

• What makes multihost storage highly available?

  Multihost storage is highly available because it can survive the loss of a single disk due to mirroring (or due to hardware-based RAID-5 controllers). Because a multihost storage device has more than one host connection, it can also withstand the loss of a single node to which it is connected.

• What multihost storage configurations are supported?

  Currently, greater than two-node connectivity is not supported. All multihosted disks within a single enclosure must connect to the same two nodes. Refer to "Sun Cluster Topologies" for more information.

• 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.