fiber optic cable
A transmission medium designed to transmit digital signals in the form of pulses of light. Fiber
optic cable is noted for its properties of electrical isolation and resistance to electrostatic
contamination.
fiber optics
The technology where light is transmitted through glass or plastic (optical) threads (fibers) for data
communication or signaling purposes.
fibre
The international spelling that refers to the Fibre Channel standards for optical media.
Fibre Channel
A data transfer architecture designed for mass storage devices and other peripheral devices that
require very high bandwidth.
Fibre Channel
adapter
See FCA.
Fibre Channel
drive enclosure
Fibre Channel Arbitrated Loop. The American National Standards Institute’s (ANSI) document
that specifies arbitrated loop topology operation.
Fibre Channel Loop
An enclosure that provides twelve-port central interconnect for Fibre Channel Arbitrated Loops
following the ANSI Fibre Channel drive enclosure standard.
field replaceable
unit
See FRU.
flush
The act of writing dirty data from cache to a storage media.
FMC
Fault Management Code. The HP Command View EVA display of the Enterprise Storage System
error condition information.
form factor
A storage industry dimensional standard for 3.5inch (89 mm) and 5.25inch (133 mm) high
storage devices. Device heights are specified as low-profile (1inch or 25.4 mm), half-height
(1.6inch or 41 mm), and full-height (5.25inch or 133 mm).
FPGA
Field Programmable Gate Array. A programmable device with an internal array of logic blocks
surrounded by a ring of programmable I/O blocks connected together through a programmable
interconnect.
frequency
The number of cycles that occur in one second expressed in Hertz (Hz). Thus, 1 Hz is equivalent
to one cycle per second.
FRU
Field Replaceable Unit. A hardware element that can be replaced in the field. This type of
replacement can require special training, tools, or techniques. Therefore, FRU procedures are
usually performed only by an Authorized Service Representative.
H
HBA
Host Bus Adapter.
See also FCA.
host
A computer that runs user applications and uses (or can potentially use) one or more virtual disks
created and presented by the controller pair.
Host Bus Adapter
See FCA.
host computer
See host.
host link indicator
The HSV Controller display that indicates the status of the storage system Fibre Channel links.
host ports
A connection point to one or more hosts through a Fibre Channel fabric. A host is a computer
that runs user applications and that uses (or can potentially use) one or more of the virtual disks
that are created and presented by the controller pair.
host-side ports
See host ports.
hot-pluggable
A method of element replacement whereby the complete system remains operational during
element removal or insertion. Replacement does not interrupt data transfers to other elements.
hub
A communications infrastructure device to which nodes on a multi-point bus or loop are physically
connected. It is used to improve the manageability of physical cables.
I
I/O module
Input/Output module. The enclosure element that is the Fibre Channel drive enclosure interface
to the host or controller. I/O modules are bus speed specific, either 1 Gb or 2 Gb.
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