Glossary

persistent binding

A form of server-level access control that uses configuration information to bind a server to a specific Fibre Channel storage volume (or logical device) using a unit number.

port

Receptacle on a device to which a cable leading to another device can be attached.

port card

Field-replaceable hardware component that provides the port connections for fiber cables and performs specific device-dependent logic functions.

port name

Name that the user assigns to a particular port through the Product Manager.

POST

See power-on self test.

power-on self-test

Series of self-tests executed each time the unit is booted or reset.

preferred domain ID

Domain ID that a switch is assigned by the principal switch in a switched fabric. The preferred domain ID becomes the active domain ID except when configured otherwise by the user.

preventive service planning bucket

Collected problems after early ship of an IBM product.

principal switch

The switch that allocates domain IDs to itself and to all other switches in the fabric. There is always one principal switch in a fabric. If a switch is not connected to any other switches, it acts as its own principal switch.

product name

User-configurable identifier assigned to a managed product. Typically, this name is stored on the product itself. For the director, the product name can also be accessed by an SNMP manager as the system name.

PSP bucket

See preventive service planning bucket.

R_A_TOV

See resource allocation time-out value.

redundancy

Performance characteristic of a system or product whose integral components are backed up by identical components to which operations will automatically failover in the event of a component failure. Redundancy is a vital characteristic of virtually all high-availability (24 hr./7 days per week) computer systems and networks.