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60 Glossary

Community strings

Statements describing administrative relationships between SNMP agents and community members.

DAE (disk array enclosure)

An intelligent, highly available, high-performance, high-capacity disk-array storage system that uses Fibre

Channel Arbitrated as its interconnect interface. A DAE connect to another DAE or a DPE, and is managed

by storage-system software in the DPE.

Data path

One of the many possible paths over which data can move in the SAN environment, potentially involving

many components or connections between initiators and targets.

DNS (Domain Name Service)

A service that translates domain names into IP addresses.

DPE (disk processor enclosure)

A highly available, high-performance, high-capacity system that uses Fibre Channel as an interconnect

interface.

Drive carrier

The metal and plastic assembly of the disk modules on either a DPE or a DAE that provides smooth, reliable

contact with the enclosure slot guides and the midplane connectors.

Enclosure ID switch

A switch located between the power supplies at the rear of the disk enclosure.

eVPS (extended Virtual Private SAN)

A virtual LUN mapping scheme for Fibre Channel hosts that runs on the SNC. It allows each host to see the

LUN map as if the LUN map began at “1”, subject to an overall device total of 2048, and a per-host device

total of 256.

FC (Fibre Channel)

A high-speed data transfer architecture. Using optical fibre to connect devices, Fibre Channel

communications are serial communications that occur at full duplex and attain data transfer rates of 200

MBps.

FC (Fibre Channel) Blade

A hardware component responsible for the data interface between hosts and storage devices. See, for

example, FCB.

Fibre Channel Arbitrated Loop (FC-AL)

An arrangement of Fibre Channel stations such that messages pass from one to the next in a ring.

Fibre Channel (FC) Switch

A high speed data transfer component of the architecture in Pathlight VX that provides interconnect

capabilities between devices.

FRU (Field Replaceable Unit)

The smallest component that can be replaced at a customer installation.

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Quantum Pathlight VX Guía de usuario Pagina 64