Open SCSI Integrator's Manual for NonStop S-Series Servers

Glossary
Open SCSI Integrator’s Manual for NonStop Servers—422988-002
Glossary-8
fault tolerance
fault tolerance. The ability of a NonStop system to continue processing despite the failure of
any single software or hardware component within the system.
FESA. See Fast Ethernet ServerNet adapter (FESA)
.
field-replaceable unit (FRU). A unit that can be replaced in the field. FRUs that are not also
customer-replaceable units (CRUs) can be replaced only by qualified personnel trained
by HP and cannot be replaced by customers. See also customer-replaceable unit (CRU)
.
file name. A unique name for a file. File names for disk files normally have at least two parts
(the disk name and the file name); an example of a file name on a PC is B:MYFILE. In
the Guardian environment on NonStop systems, disk file names include a disk volume
name, a subvolume name, and a file identifier. An example of a file name on a NonStop
system is $DISK.SUBVOL.MYFILE. For files that are network accessible, the node
name precedes the volume name: \NODE.$DISK.SUBVOL.MYFILE.
ffiller panel. A blank faceplate that is installed in place of a ServerNet adapter to ensure
proper ventilation within a system enclosure.
FIR. See FRU information record (FIR)
.
FIRINIT. A diagnostic task used to update the communications line interface processor
(CLIP) FRU information record (FIR) that is kept in the ServerNet wide area network
(SWAN) concentrator CLIP flash memory.
firmware. Code in memory that is necessary for the power-up initialization and
communication with a host or device. The software for components of the ServerNet
architecture (for example, an adapter) is called firmware. Some firmware for ServerNet
components is downloaded when the system or component is loaded.
fixed process configuration. Using Subsystem Control Facility (SCF) to configure a generic
process to always start in the first available processor (that is, to be fault tolerant).
flash memory. A type of memory that contains essential firmware and nonessential firmware.
frame. (1) A rack, supplied by HP, that supports NonStop S-series enclosures. This frame is
installed on a frame base, can be stacked two high, and can be used as an industry-
standard 19-inch rack. (2) A unit of transmission in some data communications
protocols, usually containing header, data, and checksum fields.
frame base. An assembly consisting of casters, leveling pads, and frame sheet metal that is
an integral part of a base enclosure.
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.
FTP. See ffiller panel
.