ADIC FCR 200 Operator's Manual page 133

Fibre Channel - Arbitrated Loop (FC-AL)
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.
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).
Hardware Path
See FC-SCSI Hardware Path ID on page gl-2.
Host Bus Adapter
See FC Adapter on page gl-2.
- G -
- H -
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).
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.
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.
Management Information Base (MIB)
- L -
- M -
Glossary gl-3