HP StorageWorks Modular Arrays - Manual (Page 86)

2 Compaq StorageWorks 64-Bit PCI-To-Fibre Channel Host Bus Adapter User Guide
Compaq Confidential – Need to Know Required
Writer: Bill Reitz Project: Compaq StorageWorks 64-Bit PCI-To-Fibre Channel Host Bus Adapter User Guide Comments:
Part Number: AA-RKPDA-TE 173941-001 File Name: J-GLOS GLOSSARY.DOC Last Saved On: 12/6/99 10:34 AM
Cladding The dielectric material surrounding the core of an electrical fiber or material
surrounding the core of a fiber optic cable. It usually refers to diameter,
often 125 m measured in microns.
Connector A mechanical device used to align and join two fibers together to provide a
means for attaching and decoupling it to a transmitter, receiver, or another
fiber.
Core The central region of an optical fiber through which light is transmitted.
Custom Device Module (CDM) A CDM is the driver component in the NetWare Peripheral Architecture
used to drive specific storage devices attached to the HBA.
The NPA separates NetWare driver support into two components: a Host
Adapter Module (HAM), and a Custom Device Module (CDM).
Data Rate The maximum number of bits of information that can be transmitted per
second in a data transmission link. It is typically expressed as Megabits per
second (Mbps).
Device Driver A software program that enables a personal computer to communicate with
hard drives, CD-ROM drives, printers, and other peripherals. Device drivers
are stored on a hard drive and are loaded into memory at boot up.
Duplex Cable A two-fiber cable suitable for duplex transmission or transmissions in two
directions.
Duplex Transmission Transmission in both directions, either one direction at a time (half duplex)
or both directions simultaneously (full duplex).
Fabric A fibre channel interconnection method that allows multiple simultaneous
and concurrent data transfers between multiple hosts and/or storage devices
connected with a multi-port hub.
FC-AL Abbreviation for Fibre Channel Arbitrated Loop, an interconnection scheme
that supports from 1 to 126 ports on a loop in a shared medium topology.
FCP Fibre Channel Protocol.
FDDI Fibre Distributed Data Interface. A network based on the use of optical-fiber
cable to transmit data at 100Mbit/sec.