ADIC FCR 200 Differential, Domain, Exchange, Fabric, Fast/Wide Scsi, Fault LED, FC Adapter, Fiber

Differential Fibre Channel (FC)

Differential

An electrical signal configuration using a pair of lines for data transfer. The advantage of differential compared to single-ended configuration is a relative high tolerance for common-mode noise and crosstalk when used with twisted pair cables.

Domain

A FC term describing the most significant byte in the N_Port Identifier for the FC device. It is not used in the FC-SCSI hardware path ID. It is required to be the same for all SCSI targets logically connected to a FC adapter.

- E -

Exchange

A FC term for the basic mechanism used for managing an operation. An exchange identifies information transfers consisting of one or more related nonconcurrent sequences that may flow in the same or opposite directions, but always in half duplex mode. An exchange is identified by an OX_ID and an RX_ID.

- F -

Fabric

A FC term describing a switched topology, which is one of the three existing FC topologies. Fabric elements interconnect various N_Ports or NL_Ports and are responsible for frame routing.

Fast/Wide SCSI

“Fast” and “Wide” are relative terms in comparing previous SCSI standards and products. “Fast,” as defined in SCSI-2, refers to a maximum synchronous transfer rate of 10 MHz. “Wide” refers to a data path of 16 bits.

Fault LED

During power up and self test, the FCR200 Fault LED comes on. After self test, if this LED remains on or comes on, the FCR200 has a problem with one of its components. During normal operation, this LED should be off. When the FCR200 is offline, this LED blinks.

FC

See Fibre Channel (FC).

FC-AL

See Fibre Channel - Arbitrated Loop (FC-AL) on page gl-3.

FC Adapter

A printed circuit assembly that translates data between the FC host processor’s internal bus and the FC link.

FC Device

A device that uses Fibre Channel communications.

FC Port

An opening at the back of the FCR200 that provides a fiber optic connection between the FC adapter and the FC host.

FC-SCSI Hardware Path ID

A FC term describing a list of values showing the physical hardware path of the FC host to the target device.

Format: Bus_Converter/

Adapter_Address.Protocol_Type.Area.Port.Bus.Tar get.LUN

Example: 8/4.8.0.0.2.4.0

Fiber

The fiber optic cable made from thin strands of glass through which data in the form of light pulses is transmitted (LASER, LED). It is used for high-speed transmission over medium (200m) to long (10km)distances.

Fibre

A generic FC term used to cover all transmission media types specified in the Fibre Channel Physical Layer standard (FC-PH), such as optical fiber, copper twisted pair, and copper coaxial cable.

Fibre Channel (FC)

Logically, the Fibre Channel is a bidirectional, full- duplex, point-to-point, serial data channel structured for high performance data communication. Physically, the Fibre Channel is an interconnection of multiple communication ports, called N_Ports, interconnected by a switching network, called a fabric, a point-to-point link, or an arbitrated loop. Fibre Channel is a generalized

gl-2 Glossary

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