NonStop S-Series System Expansion and Reduction Guide

Glossary
G-Series Common Glossary
Glossary-82
R2
R2. See ServerNet router 2.
raceway. An enclosed channel used to hold wires, cables, or busbars. Most raceways have
removable tops to facilitate the installation or removal of their contents.
rack. A structure that houses a chassis, power shelf, and other system components. The
HP NonStop™ S-series server is designed to be mounted in an industry-standard
19-inch rack or a NonStop S-series frame. See also frame
.
radio frequency interference (RFI). Forms of conducted or radiated interference that might
appear in a facility as either normal or common-mode signals. The frequency of the
interference can range from the kilohertz to gigahertz range. However, the most
troublesome interference signals are usually found in the kilohertz to low megahertz
range. At present, the terms radio frequency interference and electromagnetic
interference (EMI) are usually used interchangeably.
range of servers. See HP NonStop™ servers.
read-only file system. A file system with implementation-defined characteristics that restrict
changes to the files within that file system.
read/write head. An electromagnet that can pick up (read) electronic pulses and record
(write) electronic pulses on a magnetic disk or tape. The electronic pulses are
interpreted by the processor as binary data. See also disk drive
and tape drive.
real group ID. An attribute of an Open System Services (OSS) process. When an OSS
process is created, the real group ID identifies the group of the user or parent process
that created the process. The real group ID can be changed after process creation.
real user ID. An attribute of an Open System Services (OSS) process. When an OSS
process is created, the real user ID identifies the user or parent process that created
the process. The real user ID can be changed after process creation.
$RECEIVE. The name of a file through which a process receives and optionally replies to
messages from other processes.
reconfiguration. The act of changing the hardware or software configuration of a running
system. Examples include installing a new software release version update (RVU),
adding hardware peripherals, and restructuring a database. Reconfiguring a system
might or might not require a planned outage.
reduced instruction-set computing (RISC). A processor architecture based on a relatively
small and simple instruction set, a large number of general-purpose registers, and an
optimized instruction pipeline that supports high-performance instruction execution.
Contrast with complex instruction-set computing (CISC)
.
reexported library. A library whose symbols are made available by another dynamic-link
library (DLL) to any localized client of that DLL. Reexport is an attribute of the DLL’s
libList entry for that library. This attribute is specified by the DLL’s programmer and