Sun Microsystems 5310 NAS manual 10Mappings View Tab, 11Volume-to-LUN Terminology

TABLE 3-10Mappings View Tab

View	Description
Topology	Shows defined topological elements (host groups, hosts, and host
	ports), undefined mappings (volumes that have been created but do
	not have a defined volume-to-LUN mapping), and the Default
	Group.
Defined Mappings	Displays the volume-to-LUN mappings in a storage array in table
	form. Information is displayed about the volumes: topological
	entities that can access the volume, volume name, volume capacity,
	and LUN number associated with the volume.

Table 3-11describes the topological elements displayed in the Mappings View Window in Figure 3-29 on page 3-68.

TABLE 3-11Volume-to-LUN Terminology

Term	Description
SANshare Storage	A collection of nodes (default group, host groups, hosts, and host
Partitioning	ports) shown in the Topology View of the Mappings View tab.You
Topology	must define the various topological elements if you want to define
	specific volume-to-LUN mappings and storage partitions for host
	groups or hosts.
Default Group	A node in the Topology View that designates all host groups, hosts,
	and host ports that:(1) have no specific volume-to-LUN mappings
	and (2) share access to any volumes that were automatically
	assigned default LUN mappings by the controller firmware during
	volume creation.
Host Group	An optional topological element that you define if you want to
	designate a collection of hosts that will share access to the same
	volumes. The host group is a logical entity.
Host	A computer that is attached to the storage array and accesses
	various volumes on the storage array through its host ports (host
	bus adapters). You can define specific volume-to-LUN mappings to
	an individual host or assign the host to a host group that shares
	access to one or more volumes.

Chapter 3 Storage Arrays 3-69