HP Tape Library Interface Manager Software - Manual (Page 128)

128 Glossary
B
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-1). 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.
C
channel A general term for a path on which electronic signals travel.
D
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.
differential SCSI A type of SCSI cable that can go a maximum of 25 meters.
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
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.
F
fabric Fibre Channel-defined interconnection methodology that supports high-speed
data routing in Fibre Channel networks.
FC An acronym for Fibre Channel.