Compaq StorageWorks HSG60 ACS Solution Software V8.6 for Compaq Tru64 UNIX Installation and Configuration Guide

Glossary–13
participating mode A mode within an L_Port that allows the port to participate in loop activities.
A port must have a valid AL_PA to be in participating mode.
PCM Polycenter Console Manager.
PCMCIA Personal Computer Memory Card Industry Association. An international
association formed to promote a common standard for PC card-based
peripherals to be plugged into notebook computers. The card commonly
known as a PCMCIA card is about the size of a credit card.
parity A method of checking if binary numbers or characters are correct by counting
the ONE bits. In odd parity, the total number of ONE bits must be odd; in even
parity, the total number of ONE bits must be even. Parity information can be
used to correct corrupted data. RAIDsets use parity to improve the availability
of data.
parity bit A binary digit added to a group of bits that checks to see if there are errors in
the transmission.
parity RAID See RAIDset.
partition A logical division of a container, represented to the host as a logical unit.
peripheral device Any unit, distinct from the CPU and physical memory, that can provide the
system with input or accept any output from it. Terminals, printers, tape
drives, and disks are peripheral devices.
point-to-point
connection
A network configuration in which a connection is established between two,
and only two, terminal installations. The connection may include switching
facilities.
port (1) In general terms, a logical channel in a communications system. (2) The
hardware and software used to connect a host controller to a communications
bus, such as a SCSI bus or serial bus.
Regarding the controller, the port is (1) the logical route for data in and out of
a controller that can contain one or more channels, all of which contain the
same type of data. (2) The hardware and software that connects a controller to
a SCSI device.
port_name A 64-bit unique identifier assigned to each Fibre Channel port. The
Port_Name is communicated during the logon and port discovery process.
preferred address The AL_PA which an NL_Port attempts to acquire first during initialization.