Fast Ethernet Adapter Installation and Support Guide

Glossary
Fast Ethernet Adapter Installation and Support Guide—425685-003
Glossary-81
robot
robot. A media-changer device that transfers an optical disk cartridge from a storage cell to
an optical disk drive for use, then returns the cartridge to the storage cell.
root. See root fileset and root directory. See also super ID.
root directory. In the Open System Services (OSS) file system and Network File System
(NFS), a directory associated with a process that the system uses for pathname
resolution when a pathname begins with a slash (/) character.
root fileset. For the Open System Services (OSS) file system, the fileset with the device
identifier of 0, normally containing the root directory. HP recommends that this fileset
be named “root”.
root mean square (rms). A measurement method used to determine the direct current
(DC) equivalent value for alternating voltage and current waveforms. The rms method
refers to the process of sampling a waveform, squaring the samples, averaging the
samples (mean value) over the period from one cycle, then calculating the square root
of the samples. In general, rms-sensing devices are more accurate than averaging
meters. Measurements from averaging meters can be as low as 30 percent of the
actual current for loads with high crest factors.
root user. See super ID.
router. See ServerNet router.
router 1. See ServerNet router 1.
router 2. See ServerNet router 2.
RPC. See Remote Procedure Call (RPC).
RS-232. An industry standard for serial data transmission. It describes pin assignments,
signal functions, and electrical characteristics. The current standard specifies a 25-pin
connector.
RS-449. An industry standard for serial data transmission. It specifies pin assignments,
signal functions, electrical characteristics, and a 37-pin connector with an optional
9-pin connector for a secondary channel.
run-time linker. See linker.
run-time loader. See loader.
RVU. See release version update (RVU).
S700 server. See HP NonStop™ S700 Server.
S7000 server. See HP NonStop™ S7000 Server.
S7400 server. See HP NonStop™ S7400 Server.