ADIC FCR 200 Fibre Channel Arbitrated Loop FC-AL, Fibre Channel Protocol for Scsi FCP, Frame

Fibre Channel - Arbitrated Loop (FC-AL) Management Information Base (MIB)

transport mechanism that has no protocol of its own or native input/output command set, but can transport any existing Upper Level Protocols (ULPs) such as SCSI and IP.

Fibre Channel - Arbitrated Loop (FC-AL)

One of three existing Fibre Channel topologies, in which 2 to 126 devices are interconnected serially in a single loop circuit. The arbitrated loop topology supports all classes of service and guarantees in order delivery of frames when the source and destination are on the same loop.

Fibre Channel Protocol for SCSI (FCP)

FCP defines a Fibre Channel mapping layer (FC-4) that uses FC-PH services to transmit SCSI command, data, and status information between a SCSI initiator and a SCSI target. Using FCP enables transmission and receipt of SCSI commands, data and status, across the Fibre Channel using the standard Fibre Channel frame and sequence formats.

Frame

The smallest, indivisible unit of information transfer used by Fibre Channel. Frames are used for transferring data associated with a sequence. Frame size depends on the hardware implementation and is independent of the ULP or the application software.

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Gigabaud Interface Converter (GBIC)

A physical component that manages the functions of the FC-0 layer, which is the physical characteristic of the media and interface, including drivers, transceivers, connectors, and cables. Mounts on a FC adapter card and connects the FCR200 to a FC host. Also referred to as a Physical Link Module (PLM).

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Hardware Path

See FC-SCSI Hardware Path ID on page gl-2.

Host Bus Adapter

See FC Adapter on page gl-2.

Indexed Addressing

A menu name. It allows for generic Fibre Channel host bus adapters to access SCSI devices attached to the FCR200 using a table which is indexed by sequential LUN values.

Initiator

A SCSI device (usually a host system) that requests an operation to be performed by another SCSI device known as the target (for example, a SCSI disk or tape drive).

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Link

For Fibre Channel, it is a connection between two nodes, each having at least one N_Port, interconnected by a pair of optical or copper links, one inbound and one outbound.

Longwave

Lasers or LEDs that emit light with wave lengths around 1300 nm. When using single mode (9 nm) fibre, longwave lasers can be used to achieve lengths greater than 2Km.

Loop Address

A FC term indicating the unique ID of a node in Fibre Channel loop topology, sometimes referred to as a Loop ID. Also a status type in the FC Status Menu, showing the FC Loop Address of the FCR200.

Loop Port (L_Port)

A FC port that supports loops.

LUN

Logical Unit Number or Logical Unit; a subdivision of a SCSI target. For SCSI-3, each SCSI target supports up to sixteen LUNs (LUN-0 to LUN-16). Using LUNs, the FC host can address multiple peripheral devices that may share a common controller.

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Management Information Base (MIB)

A structured set of data variables, called objects, in which each variable represents some resource to be managed. A related collection of resources to be managed.

Glossary gl-3