NonStop S-Series Server Description Manual (G06.24+)

Glossary
HP NonStop S-Series Server Description Manual—520331-003
Glossary-33
fan
database that matches your order. Your system is shipped with this version installed in
the system subvolume $SYSTEM.SYS00.
fan. A component within an HP NonStop™ S-series system enclosure that circulates air
into the enclosure to help maintain optimal temperature. Each NonStop S-series
system enclosure contains two fans.
far gateway. A short code sequence that accomplishes the transition to privileged mode for
legitimate calls to callable procedures that are located in a different direct jump area.
Typically, SCr (system code, RISC) is the target area. See also direct jump area, far
jump, and gateway.
far jump. A sequence of RISC instructions that permits crossing the boundaries of the
256-megabyte direct jump areas in virtual memory. Such sequences are necessary, for
example, when calling into system code from user code, because the two are located
in different direct jump areas. The sequence ends with a JR (Jump via Register) RISC
instruction.
fastLoad. An optimization that allows the loader to avoid reading symbols and binding
symbolic references when loading a program or dynamic-link library in an environment
equivalent to that of a previous load. See also preset, cached bindings, and library
import characterization (LIC).
Fast Ethernet ServerNet adapter (FESA). A single-ported ServerNet adapter that supports
100-megabit/second (Mbps) or 10-Mbps Ethernet data transfer rates on an HP
NonStop™ S-series server. The 3863 FESA installs directly into an available I/O port.
fault tolerance. The ability of a computer system to continue processing despite the failure
of any single software or hardware component within the system.
feature-test macro. In C and C++ programs, a symbol that, if defined in a program’s source
code, includes specific other symbols from a header within that program’s source code
and makes those symbols visible.
feeder circuit. The circuit conductors installed between the facility’s main service entrance
and the power distribution panels (PDPs) that supply the branch circuits.
ferrule. A cylindrical end terminal sometimes used on resistors, cartridge fuses, and other
parts to permit quick insertion and removal from holders that have corresponding
spring contacts.
FESA. See Fast Ethernet ServerNet adapter (FESA).
Fiber Optic Extension (FOX). Refers to two products, FOX II and ServerNet/FX, which
allow you to create high-speed (up to 4 megabytes/second) networks of as many as 14
systems connected by dual fiber-optic cables.
fiber-optic plug-in card (F-PIC). A plug-in card (PIC) for the 6760 ServerNet device
adapter (ServerNet/DA) that uses a fiber-optic interface to connect an HP NonStop™