HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Maintenance and Service Guide (EK-G80MS-SA. C01, March 2005)

Glossary
271HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software
Maintenance and Service Guide
pluggable
A replacement method that allows the complete system to remain online during device removal
or insertion. The system bus must be halted, or quiesced, for a brief period of time during the
replacement procedure. See also hot-pluggable.
port
In general terms, the port is:
■ A logical channel in a communications system.
■ The hardware and software used to connect a host controller to a communications bus, such
as a SCSI bus or serial bus.
Regarding the array controller, the port is:
■ The logical route for data in and out of an array controller that can contain one or more
channels, all of which contain the same type of data.
■ The hardware and software that connects an array controller to a SCSI device.
primary enclosure
The primary enclosure is the subsystem enclosure that contains array controllers, cache
modules, external cache batteries, and the PVA module.
program card
The PCMCIA card containing HSG60 or HSG80 array controller operating software. See also
PCMCIA.
protocol
The conventions or rules for the format and timing of messages sent and received.
PTL
Port-Target-LUN. The array controller method of locating a device on the array controller
device bus.
PVA module
Power Verification and Addressing module.
quiesce
The act of rendering bus activity inactive or dormant. For example, quiesce the SCSI bus
operations during a device warm swap.
RAID
Redundant array of independent disks. Represents multiple levels of storage access developed
to improve performance or availability, or both.