Sun Microsystems manual 70Sun StorEdge 5310 NAS Troubleshooting Guide December

TABLE 3-11Volume-to-LUN Terminology

Term	Description
Host Port	The physical connection that allows a host to gain access to the
	volumes in the storage array. When the host bus adapter only has
	one physical connection (host port), the terms host port and host bus
	adapter are synonymous. Host ports can be automatically detected
	by the storage management software after the storage array has
	been connected and powered-up. Therefore, if you want to define
	specific volume-to-LUN mappings for a particular host or create
	storage partitions, you must define the host's associated host ports.
	Initially, all detected host ports belong to the Default Group.
	Therefore, if during volume creation, you had a LUN automatically
	assigned to a volume, that volume will be accessible by any of the
	host ports in the Default Group. If you have the SANshare Storage
	Partitioning feature enabled, then you should always choose to map
	the volume later using the options in the Mappings View so that a
	LUN is not automatically assigned to a volume during volume
	creation.
	Use the host bus adapter utility to find the World Wide Name
	(WWN) of the host port. (This is the host port identifier shown in
	the Define New Host Port dialog in the Mappings View.) The
	WWNs for the host ports on a particular host are used to define the
	host ports and associate them with a particular host using the Define
	New Host Port dialog. If necessary, refer to your operating system
	or host bus adapter documentation for more information.
	If a host port is moved, any volume-to-LUN mappings must be re-
	mapped. Access to your data will be lost until this is done.

3-70Sun StorEdge 5310 NAS Troubleshooting Guide • December 2004