NonStop S-Series Hardware Installation and FastPath Guide (G06.25+)

Glossary
HP NonStop S-Series Hardware Installation and FastPath Guide—529443-001
Glossary-52
input/output process (IOP)
input/output process (IOP). A running program (part of the HP NonStop™ operating
system) that manages the I/O functions for one or more ServerNet addressable
controllers (SACs) of the same type.
input source. The resource from which Subsystem Control Facility (SCF) accepts
command input. SCF can accept input from a terminal or a disk file. The initial input
source is determined by the form of the RUN command used to initiate SCF. At any
time during an SCF session, the input source can be temporarily changed to execute a
series of commands from a command file.
inrush current. The initial surge current demand of a load.
Inspect region. The region of a TNS object file that contains symbol tables for all blocks
compiled with the SYMBOLS directive. The Inspect region is sometimes called the
symbols region.
INSPSNAP. The program that provides a process snapshot file for the Inspect subsystem.
installation subvolume (ISV). A subvolume containing files that perform a specific function
during the installation process, such as organizing documentation in a specific location,
providing the components of the HP NonStop™ operating system image (OSIMAGE),
and containing files that are used after the installation process.
installer. The person who installs the system equipment for a new system. This person also
installs new equipment when additions are made to the system. This person can install
software and perform system verification procedures as directed by the system
planner, configuration planner, or support planner.
instruction processing unit (IPU). A processing unit that executes programs by fetching
instructions from memory and executing them.
insulated ground. A grounding conductor with a dielectric (low-conductance) insulator
around it to prevent inadvertent contact with metal conduits.
intelligent SCSI processor (ISP). The ServerNet addressable controller (SAC) that
controls the small computer system interface (SCSI) bus.
interactive mode. A mode of operation that is characterized by having the same input and
output device (a terminal or a process) for the session. If a terminal is used, a person
enters a command and presses Return. If a process is used, the system interface waits
for the process to send a request and treats the process in the same manner as a
terminal. Contrast with noninteractive mode.
internal routing. The routing of packets within an HP NonStop™ server. See also external
routing.
internal ServerNet fabrics. The fabrics that link ServerNet devices within an HP
NonStop™ server. See also external ServerNet fabrics.