HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide (EK-G80TS-SA. C01, March 2005)

Glossary
288 HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide
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A physical connection between two Fibre Channel ports.
local connection
A connection to the subsystem, by way of the controller serial maintenance port, to a
maintenance terminal or the host terminal. A local connection enables you to connect to one
subsystem controller to perform maintenance tasks.
See also maintenance terminal and local terminal.
local terminal
A terminal plugged into the EIA-423 maintenance port located on the front bezel of the
controller.
See also maintenance terminal and local connection.
logical block number
See LBN.
logical bus
A single-ended bus connected to a differential bus by a SCSI bus signal converter.
logical unit
A physical or virtual device addressable through a target ID number. Logical units use their
target bus connection to communicate on the SCSI bus.
See also unit.
logical unit number
See LUN.
logon
Also called login. A procedure whereby a participant, either a person or network
connection, is identified as being an authorized network participant.
loop
See arbitrated loop.
loop tenancy
The period of time that occurs when a port wins loop arbitration and after the port returns to
a monitoring state.
loop_ID
A seven-bit value numbered contiguously from zero to 126-decimal, representing the 127
legal AL_PA values on a loop. Not all of the 256 hex values are allowed as AL_PA values
per FC-AL.