Compaq StorageWorks Data Replication Manager HSG80 ACS Version 8.5P Operations Guide

Glossary G–11
PCM Polycenter Console Manager.
PCMCIA An abbreviation for 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. A PCMCIA
card is about the size of a credit card. It is used in the HSJ80 to load the
controller software.
See also program card, ACS.
PCR An abbreviation used to express peak cell rate. PCR is the maximum
transmission speed of a virtual connection. PCR is a required parameter for
the CBR service category.
peer-to-peer remote copy See remote copy sets.
planned failover As applied to the Data Replication Manager: an orderly shutdown of the
controllers for installation of new hardware, updating the software, and so on.
The host applications are quiesced and all write operations permitted to
complete before the shutdown. The controllers must be in synchronous
operation mode before starting a planned failover.
See also synchronous operation mode
PL_DA
or
PLDA
A term used to express Private Loop Direct Attach. PLDA is a Fibre Channel
profile, a proper subset of arbitrated loop. The PLDA profile (part of the
Fibre Channel Standard), defines a specific way to implement arbitrated loop
topology.
port
■ In general terms, the port is:
1) 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.