HP ProLiant Cluster HA/F500 for Enterprise Virtual Array Setup and Installation Guide

Glossary
active/active
A dual-controller, dual-adapter, storage subsystem configuration in which both controller-
adapter I/O paths have access to separate logical units (LUNs). Also known as multibus.
active/standby
A dual-controller, single-adapter storage subsystem configuration in which one controller is
in an online state and has control of the logical storage units. The other controller is in a
standby state. Also known as transparent.
adapter
A device that converts the protocol and hardware interface of one bus type into another
without changing the function of the bus.
ALPA
See arbitrated loop physical address (ALPA).
arbitrated loop
A Fibre Channel topology that links multiple ports together on a single shared simplex media.
Transmissions can only occur between a single pair of nodes at any given time. Arbitration is
the scheme that determines which node has control of the loop at any given moment.
arbitrated loop physical address (ALPA)
A one-byte value used to identify a port in an arbitrated loop topology. This value becomes
the last byte of the address identifier for each public port on the loop.
array
All the physical disk drives in a storage system that are known to and under the control of a
controller pair.
HP ProLiant Cluster HA/F500 for Enterprise Virtual Array Setup and Installation Guide Glossary-1
HP CONFIDENTIAL
Writer: Bill Akers File Name: g-glossary
Codename: 49ers II Part Number: 323454-001 Last Saved On: 3/20/03 11:16 AM