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

Glossary
Open SCSI Integrator’s Manual for NonStop Servers—422988-002
Glossary-25
system
processor (CLIP) and provides a variety of management functions such as coordinating
data link control (DLC) and diagnostic task downloads.
system. A node. All the processors, controllers, firmware, peripheral devices, software, and
related components that are directly connected together to form an entity that is
managed by one operating system image and operated as one computer.
system area network (SAN). (1) A wormhole-routed, full-duplex, packet-switched,
point-to-point network designed with special attention to reducing latency and ensuring
reliability. The ServerNet SAN provides the communication path used for interprocessor
messages and for communication between processors and I/O devices. (2) A low-cost,
high-speed network, contained within a system, that connects processors to each other
and to ServerNet addressable controllers (SACs).
system code. A logically distinct part of the NonStop operating system that consists of
operating-system procedures shared by all processors.
system configuration database. The database file on the $SYSTEM.ZSYSCONF subvolume
that contains configuration information for all system objects that can be configured by
SYSGENR and Subsystem Control Facility (SCF). See also configuration file
.
system console. A TSM workstation configured as the primary or backup dial-out point. The
TSM workstation configured as the primary dial-out point is called the primary system
console. The TSM workstation configured as the backup dial-out point is called the
backup system console.
system enclosure. An enclosure for system components. Processor enclosures and I/O
enclosures are both system enclosures. Contrast with peripheral enclosure
.
system engineer (SE). See service provider
.
system expansion. The process of making a target system larger by adding enclosures to it.
The enclosures being added can be either new enclosures or enclosures from a donor
system. Contrast with system reduction
.
system image tape (SIT). A tape that can be used to perform a system load on a system if the
system subvolume has become corrupted on both $SYSTEM disks. The tape contains a
minimum set of software necessary to bring up and run the system. Use the SIT only for
disaster recovery; it is not needed for normal system load. Contact the Global Customer
Support Center (GCSC) before loading the system from a SIT; many additional steps are
required to restore your system to working order. See also tape load
.
system load. (1) To start the system; to load the operating system image from disk or tape
into the memory of a processor. (2) The process of loading a copy of the operating
system from an OSIMAGE file into a halted processor. All processors in a system must
be halted before a system load can occur. The processor to be loaded is specified in the
TSM or LOBUG interface. (3) The process of loading the operating system. A system
load changes a system from an inactive to an active (or operational) state by loading
software that establishes communication between the operating system and configured
system peripherals. See also tape load
.