Sun Oracle Storage Tek T10000, Reference Manual

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E20425-01 • Glossary 261
Glossary
Fiber Distributed Data Interface (FDDI) An
NCITS standard for transmitting data at 100
mega-baud over fiber optic cable.
Fiber Optic Cable A jacketed cable of thin
strands of glass which carry pulses of light that
transmit data for high-speed transmissions over
medium to long distances. The cable can be
single mode, which carries a single signal from a
laser or LED light source, or multi-mode, which
carries multiple signals from either light source.
Fibre Channel The ANSI standard that defines
an ultra high-speed, content independent, multi-
level data transmission interface that can support
multiple protocols simultaneously, support
connectivity to millions of devices over copper
and/or fiber optic physical media, and provides
the best characteristics of both networks and
channels, over diverse topologies.
Fibre Channel Physical and Signaling
Interface (FC-PH-1) See
FC-PH-1.
Fibre Channel Protocol The mapping of SCSI-
3 commands over a fibre channel interface.
FIFO First in first out.
Fill Word A word transmitted between frames
containing no information essential to either
frame. The fill words are defined by the topology.
The Idle primitive signal is an example of a fill
word.
FL_Port An F_Port within the Fabric which also
contains the Loop Port State Machine as defined
in FC-AL-2. The FL_Port attaches to an NL_Port
through a link.
FLOGI Fabric Login.
Flow Control The process of limiting the
number of single frames or groups of frames
received by the receiving port. This is
accomplished using a credit system.
See Buffer-
to-Buffer Credit (BB_Credit) and End-to-End
Credit (EE_Credit).
Frame An indivisible, encapsulated data
structure containing a beginning-of-frame (BOF)
and end-of-frame (EOF) designator, which
carries a payload of both control data and user
data from one FC port to another.
Frame Header The first field in a frame that
contains addressing information, as well as other
control information, about the frame.
FRU Field replaceable unit.
FSC See Fault Symptom Code.
Full Duplex A communication protocol that
allows signals to be transmitted and received
simultaneously, and usually contains flow control.
G
GAID Get alias_ID.
GBIC Giga-bit interface converter.
H
Half Duplex A communications protocol that
permits a port to transmit or receive frames at
any point in time, but not simultaneously, as in
full duplex. The one exception to this is with link
control frames, which are always allowed in full
duplex.
HBA See host bus adapter.
Header Data The part of a message that
contains system-defined control information. This
data may contain, but not be restricted to, one or
more destination fields, initiator and receiver
address, and priority level of the message.
Hexadecimal A number system with a base
of 16 instead of 10.
High Performance Parallel Interface The
NCITS standard that defines high-speed
information transfer using dual simplex, over a
short parallel bus.
HIPPI See High Performance Parallel Interface.
Host A processor, usually composed of a CPU
and memory, that typically communicates with
peripheral devices over channels and/or
networks, to perform I/O operations such as
network control. It also provides end users with
computation services and database access.
host bus adapter (HBA) A circuit installed in a
multi-platform host or device that interfaces
between the device and the bus.