IBM SAN16B-2 - TotalStorage Express Model Switch User And Service Manual page 76

Fibre Channel transport. A protocol service that
supports communication between Fibre Channel service
providers. See also Fibre Channel service protocol.
field replaceable unit (FRU). An assembly that is
replaced in its entirety by a service representative when
any one of its components fails. In some cases, a field
replaceable unit can contain other field replaceable
units.
File Transfer protocol (FTP). In Transmission Control
protocol/Internet protocol (TCP/IP), an application
protocol used for transferring files to and from host
computers.
fill word. An IDLE or ARB ordered set that is
transmitted during breaks between data frames to keep
the Fibre Channel link active.
firmware. The basic operating system provided with
the hardware.
FLA. Fabric loop attach.
flash partition. Two redundant usable areas, called
partitions into which firmware can be downloaded in the
director/switch.
FLOGI. See fabric login.
FL_port. See fabric loop port.
F_port. See fabric port.
frame. The Fibre Channel structure used to transmit
data between ports. Consists of a start-of-frame
delimiter, header, any optional headers, the data
payload, a cyclic redundancy check (CRC), and an
end-of-frame delimiter. There are two types of frames:
link control frames (transmission acknowledgements,
and so on) and data frames.
frame delimiter. A part of an ordered set that marks
frame boundaries and describes frame contents. See
also ordered set.
FRU. See field replaceable unit.
FS. See Fibre Channel service.
FSP. See Fibre Channel service protocol.
FSPF. See Fibre Channel shortest path first.
FTP. See File Transfer protocol.
full duplex. A mode of communication that allows the
same port to simultaneously transmit and receive
frames. See also half duplex.
Fx_port. A fabric port that can operate as either a
fabric port (F_port) or fabric loop port (FL_port). See
also fabric port and fabric loop port.
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SAN16B-2 Installation, Service, and User's Guide
G
gateway. Hardware that connects incompatible
networks by providing the necessary translation for both
hardware and software.
GBIC. See gigabit interface converter.
Gbps. Gigabits per second.
GBps. Gigabytes per second.
generic port (G_port). A generic port that can operate
as either an expansion port (E_port) or a fabric port
(F_port). A port is defined as a G_port when it is not yet
connected or has not yet assumed a specific function in
the fabric.
gigabit interface converter (GBIC). A removable
serial transceiver module designed to provide gigabaud
capability for fibre channel (FC) and other products that
use the same physical layer.
G_port. See generic port.
H
HA. See high availability.
half duplex. A mode of communication that allows a
port to either transmit or receive frames at any time, but
not simultaneously (with the exception of link control
frames, which can be transmitted at any time). See also
full duplex.
hard address. The arbitrated loop physical address
(AL_PA) that a node loop port (NL_port) attempts to
acquire during loop initialization.
hardware translative mode. Method for achieving
address translation. The two hardware translative
modes that are available to a QuickLoop-enabled switch
are standard translative mode and QuickLoop mode.
See also standard translative mode and QuickLoop
mode.
HBA. See host bus adapter.
high availability. An attribute of equipment that
identifies it as being capable of operating well in excess
of 99 percent of the time. High Availability is typically
identified by the number of nines in that percentage. For
example, a switch that is rated at five nines would be
capable of operating 99.999 percent of the time without
failure.
host. A computer that is connected to a network and
provides an access point to that network. The host can
be a client, a server, or both a client and server
simultaneously.