Compaq GS160, GS320, GS80 - page 176

Glossary-4
Power cabinet Cabinet in the GS160/320 syste ms that provides power
for the system cabinets and houses PCI boxes and
storage shelves.
Power input Power is supplied to the entire system box through the
QBB at the rear of the cabinet. Vaux and 48 volt input
and return are supplied.
Power system
manager
See PSM.
Primary PCI box The PCI master box whose system control manager
(SCM) controls the system. See also Secondary PCI
box.
PSM Power system manager; a module in each QBB that
monitors CPUs, voltages, temperatures, and fan speeds
in the QBB and then reports this information to the
system control manager (SCM). The SCM can make
requests of the power system manager.
QBB Quad building block; the basic building block of the
system. The QBB backplane provides a crossbar switch
and connectors for one to four processor modules, one to
four memory modules, power converters, a power
system manager, a memory directory module, a clock
splitter module, a global port, and I/O ports.
QBB, hard Nu mber that indicates the physical location of a QBB in
a system.
QBB, soft Number that indicates a QBB as reported by the
firmware.
Rack cabinet The GS80 cabinet configured as a complete system that
holds up to two system drawers, each of which has one
QBB.
Remote I/O riser
module
The I/O riser module that is in the PCI box.
Remote testing Testing run by the system primary CPU on a QBB
other than the QBB in which it resides.