HP StorageWorks Fabric OS 5.X Master Glossary (AA-RW7NA-TE, September 2005)

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 encod ing An encoding scheme that c onverts each 8-bit byte into 1 0 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 g uaranteed ac cess to an arbitrated
loop.
active copper A Fibre Channel connection that allows copper cabling up to 33 meters (36
yards) between devices.
address identifier A24-bitor8-bitvalueusedtoidentifythesourceordestinationofaframe.
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 tim e 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 por t in addition to its standard identifier.
An alias address identifier can be s hared 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 facilit y that supports multicast group management.
ANSI American National Standards Institute. A private, nonprofitorganizationthat
administers and coordinates voluntary standards in the United States. A NSI
has a num ber of working commit tees. 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_Por t to indicate that the port is arbitrating
access to the loop.
arbitrated loop A shared 1 00-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