NonStop S-Series Hardware Installation and FastPath Guide (G06.26+)

Glossary
HP NonStop S-Series Hardware Installation and FastPath Guide—529876-001
Glossary-45
Guided Replacement Toolkit (GRT)
TSM. For example, Add Node to ServerNet Cluster is the OSM equivalent of Configure
ServerNet Node in TSM.
Guided Replacement Toolkit (GRT). A software product that guides you through online
replacement of these customer-replaceable units (CRUs) on HP NonStop™ S-series
systems: I/O multifunction (IOMF) CRUs, power supplies, processor multifunction
(PMF) CRUs, and 6760 ServerNet device adapters. GRT is used only with older
versions of TSM server software. If you are replacing a CRU in a system running TSM
server version T7945AAX (shipped with G06.13) or later, use the appropriate guided
procedure.
hard link. In the Open System Services (OSS) file system, the relationship between two
directory entries for the same file. A hard link acts as an additional pointer to a file. A
hard link cannot be used to point to a file in another fileset. Contrast with symbolic link.
hard reset. An action performed on an HP NonStop™ Cluster Switch (model 6770) and HP
NonStop™ ServerNet Switch (model 6780) that reinitializes the router-2 ASIC within
the switch, disrupting the routing of ServerNet messages through the switch for several
minutes. When the hard reset is finished, the paths are restored automatically.
harmonic. The sinusoidal component of an alternating-current (AC) voltage that is a
multiple of the waveform frequency.
harmonic distortion. Harmonics that change an alternating-current (AC) waveform from
sinusoidal to complex.
header. An object that, when specified for inclusion in a program’s source code, causes the
program to behave as if the statement including the header were actually a specific set
of other programming statements. A header contains coded information that provides
details (such as data item length) about the data that the header precedes.
In an Open System Services (OSS) program, a header is the name of a file known to
the run-time library used by a process. In a Guardian environment C language
program, a header is the file identifier for a file known to the run-time library used by a
process.
heat sink. A metal conductor specifically designed to absorb and dissipate excess heat.
HEF. Hardware error freeze.
hertz (Hz). A unit of frequency. One hertz equals one cycle/second.
high frequency. A Federal Communications Commission (FCC) designation for a
frequency in the range 30 through 300 megahertz, corresponding to a decametric
wave in the range 10 through 100 meters.
high PIN. A process identification number (PIN) that is greater than 255. Contrast with low
PIN.