HP StorageWorks 2/64 HP StorageWorks Fabric OS 5.x Master Glossary (AA-RW7NA-T - Page 3

Glossary This glossary defines terms used in the HP StorageWorks Fabric OS 5.x documentation set or related to the Fabric OS 5.x product. It is not a comprehensive glossary of computer terms. 8b/10b encoding An encoding scheme that converts each 8-bit byte into 10 bits. Used to balance ones and zeroes in high-speed transports. ABTS Abort Basic Link Service. Also called Abort Sequence ACC Accept link service reply. The normal reply to an Extended Link Service request (such as FLOGI), indicating that the request has been completed. access fairness A process by which contending nodes are guaranteed access to an arbitrated loop. active copper A Fibre Channel connection that allows copper cabling up to 33 meters (36 yards) between devices. address identifier A 24-bit or 8-bit value used to identify the source or destination of a frame. See also D_ID and S_ID. AL_PA Arbitrated-loop physical address. A unique 8-bit value assigned during loop initialization to a port in an arbitrated loop. AL_TIME Arbitrated-loop timeout value. Twice the amount of time it would take for a transmission word to propagate around a worst-case loop. The default value is 15 milliseconds. alias A logical grouping of elements in a fabric. An alias is a collection of port numbers and connected devices, used to simplify the entry of port numbers and WWNs when creating zones. alias address identifier An address identifier recognized by a port in addition to its standard identifier. An alias address identifier can be shared by multiple ports. See also alias. alias AL_PA An AL_PA value recognized by an L_Port in addition to the AL_PA assigned to the port. See also AL_PA. alias object A name assigned to one device or group of devices to allow an intuitive name structure for a zone object. See also zone object. alias server A fabric software facility that supports multicast group management. ANSI American National Standards Institute. A private, nonprofit organization that administers and coordinates voluntary standards in the United States. ANSI has a number of working committees. The X3T11 committee is principally responsible for Fibre Channel interface standards. ARB Arbitrative primitive signal. Applies only to an arbitrated-loop topology. Transmitted as the fill word by an L_Port to indicate that the port is arbitrating access to the loop. arbitrated loop A shared 100-Mbps Fibre Channel transport structured as a loop. Can support up to 126 devices and one fabric attachment. See also topology. Fabric OS 5.x master glossary 3