NonStop S-Series Planning and Configuration Guide (G06.25+)

Glossary
HP NonStop S-Series Planning and Configuration Guide—523303-015
Glossary-39
four-lane link
four-lane link. The four single-mode fiber-optic (SMF) ServerNet cables that connect the
two HP NonStop™ Cluster Switches on the same external fabric (for example, X1 and
X2) in a split-star topology
.
FOX. See Fiber Optic Extension (FOX).
FOXMON. See FOX monitor process.
FOX monitor process. The Fiber Optic Extension (FOX) monitor process for the
ServerNet/FX adapter subsystem. The process name is $ZZFOX.
FOX ring. The fiber-optic cabling that connects the nodes in a Fiber Optic Extension (FOX)
cluster. This term is also used to refer to the topology of a FOX network.
FPGA. See field-programmable gate array (FPGA).
F-PIC. See fiber-optic plug-in card (F-PIC).
frame. (1) An assembly of sheet-metal parts that is an integral part of an enclosure and
might contain peripherals or a chassis
, depending on the type of enclosure. The frame
enables the enclosures to be stacked and has provisions for routing and securing
cables. The frame of an enclosure has dimensions that conform to an industry-
standard 19-inch rack. (2) A unit of transmission in some data communications
protocols, usually containing header, data, and checksum fields. (3) In NonStop S-
series processors, a 4096-byte unit of physical memory; also called a physical page.
frame base. An assembly consisting of casters, leveling pads, and frame sheet metal that is
an integral part of a base enclosure.
free list. In the Open System Services (OSS) file system, the list of available inodes that
can be allocated to files.
frequency. The number of complete cycles/second of sinusoidal variation. For alternating-
current (AC) power lines, the most common frequencies are 60 hertz and 50 hertz.
FRU. See field-replaceable unit (FRU).
FRU information record (FIR). A collection of information that every field-replaceable unit
(FRU) carries with it, such as part number, revision, track ID, and media access control
(MAC) address.
F-SAC. See fiber-optic ServerNet addressable controller (F-SAC).
FTAM. See File Transfer, Access, and Management (FTAM).
FTP. See file transfer protocol (FTP).
gateway. (1) A device used to convert the message protocol of one network to that of
another. (2) A short code sequence that accomplishes the transition to privileged mode
for legitimate calls to callable procedures. See also far gateway
.