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FICON channel
A channel having a Fibre Channel connection (FICON) channel-to-control-unit I/O
interface that uses optical cables as a transmission medium. May operate in either FC
or FCV mode.
file-protect
To prevent the erasure or overwriting of data stored on data cartridges. See also write-
protect switch.
firmware
An ordered set of instructions and data stored in a way that is functionally
independent of main storage; for example, microprograms stored in ROM. (T)
FRU
Field replaceable unit.
FSC
Fault symptom code.
FTP
File Transfer Protocol.
G
Gb
9
Gigabit, equal to 10
bits.
Gbps
Gigabits per second.
gigabyte (GB)
30
9
One X 2
bytes (binary) or 1 X 10
(decimal).
H
hardware
All or part of the physical components of an information processing system, such as
computers or peripheral devices. (T) (A)
host
The primary computer on a network, with which other computers interact.
host interface
An interface between a network and host computer. (T)
hub
A Fibre Channel Arbitrated Loop switching device that allows multiple servers and
targets, such as storage systems, to connect at a central point. A single hub
configuration appears as a single loop.
I
indicator
A device that provides a visual or other indication of the existence of a defined state.
(T)
Glossary 105
December 2012
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