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Glossary
adapter
A printed circuit assembly that translates data between the FC host processor's internal bus and
a different bus, such as SCSI.
address
See SCSI addressing.
addressing mode
Used to create a mapping table that maps devices on the SCSI bus to Fibre Channel logical
units.
AL_PA
Arbitrated Loop Physical Address. A unique one-byte valid value, derived and used in an
Arbitrated Loop Topology as defined in ANSI specification FC_AL ver 4.5.
arbitrated loop
See Fibre Channel - Arbitrated Loop. (ANSI specification FC_AL ver 4.5)
area
The second byte of the N_Port Identifier.
auto-assigned
A menu item. The auto-addressing option creates a mapping table using devices discovered
mapping
upon powering up or resetting the interface card, that is not otherwise retained by the
interface card.
baud
A unit of signaling speed, expressed as the maximum number of times per second the signal
can change the state of the transmission line or other medium (units of baud are sec
With Fibre Channel scheme, a signal event represents a single transmission bit.
bus
A means of transferring data between modules and adapters or between an adapter and SCSI
devices. For a SCSI bus definition, see SCSI bus.
channel
A general term for a path on which electronic signals travel.
clusters
Two or more computers sharing the same resources on a communication link.
interface card
An intelligent device within the SAN (storage area network) infrastructure that can handle
multiple protocols, such as Fibre Channel and SCSI. The routing decision is based on paths
between address mappings among dispersed initiators and targets.
interface
Configuration involving at least two interface card/routers where one interface card/router is
card-to-router
in Initiator Mode and another in Target Mode.
device
See FC Device or SCSI Device.
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. In layman's terms, this
means longer distance.
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.
exchange
A FC term for the basic mechanism used for managing an operation. An exchange identifies
information transfers consisting of one or more related non concurrent 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.
fabric
An FC term that includes FC Arbitrated Loop, Switched Fabric, and Point-to-Point.
FC
See Fibre Channel.
e1200-320 4Gb Fibre Channel Interface Card user and service guide 123
-1
). Note:
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