EMC DS-8B manual Glossary

Glossary

Gbps Gigabits (1,062,500,000 bits) per second.

GBps Gigabytes (1,062,500,000 bytes) per second.

H

Half-duplexMode of communication that allows a port to either transmit or receive frames, but not both at once. The only exception is link control frames, which can be transmitted at any time. See also Full-duplex.

Hard address The AL_PA that an NL_Port attempts to acquire during loop initialization.

HBA Host Bus Adapter. Interface card between a server or workstation bus and the fibre channel network. Similar to a network interface card.

Hub Fibre channel wiring concentrator that collapses loop topology into physical star topology. Nodes are automatically added when active and removed when inactive.

I

Idle Continuous transmission of an ordered set when no data is being transmitted to maintain an active fibre channel link and bit, byte, and word synchronization. See also Fill word.

Initiator Server or workstation that initiates communications with storage

devices over a fibre channel network. See also Target.

IOD In Order Delivery. A parameter that, when set, guarantees that frames are delivered in-order if possible, and dropped if not.

ISL Interswitch Link. Fibre channel link from the E_Port of one switch to E_Port of another. Used to connect equipment ports to fabric in loop configuration through FL_Port. See also E_Port, Cascade.

IU Information Unit. An individual set of information as defined by higher level process protocol definition, or upper-level protocol mapping.

J

JBOD Just a Bunch Of Disks. A number of disks connected in a single chassis to one or more controllers. See also RAID.

Departmental Switch Models DS-16B and DS-8B Web Tools User Guide

g-7