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

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.

TABLE 3-11 Volume-to-LUN Terminology

Term Description

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