6760 ServerNet/DA Manual

Glossary
6760 ServerNet/DA Manual—424879-003
Glossary-75
root directory
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.
S700 server. See HP NonStop™ S700 Server.
S7000 server. See HP NonStop™ S7000 Server.
S7400 server. See HP NonStop™ S7400 Server.
S7600 server. See HP NonStop™ S7600 Server.
S70000 server. See HP NonStop™ Sxx000 Server.
S72000 server. See HP NonStop™ Sxx000 Server.
S74000 server. See HP NonStop™ Sxx000 Server.
S76000 server. See HP NonStop™ Sxx000 Server.