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Glossary-2
Hard partition A partition consisting of one or more QBBs and sharing
no resources with any other parition. Hard partitions
are defined by using the SCM command language. See
also Partition.
Hierarchical
switch
See H-switch.
Hose A logical PCI bus; or the cable between a QBB and a PCI
box.
Hot-swap state A state of the system that allows swapping of certain
components while power is present in the system. See
also Cold-swap, Warm-swap, and AC off states.
HPM H-switch power manager; controls power and monitors
power and temperature inside the H-switch housing. The
HPM reports status to the system control manager. The
SCM can make requests of the H-switch power manager.
H-switch Hierarchical switch; a high-speed switch that connects
all QBBs through their global ports. See also Distribu-
tion board.
H-switch power
manager
See HPM.
I/O port Backplane logic that provides an interface to the local
I/O riser module.
I/O riser module
See Local I/O riser module and Remote I/O riser module.
Instance
An operating system running in a partition.
LFU Loadable Firmware Update Utility; firmware used to
update the SRM console firmware and I/O device firm-
ware.
Loadable Firmware
Update Utility
See LFU.
Local I/O riser
module
A module on the QBB that provides the interface be-
tween the QBB and the remote I/O riser on the PCI.
Local primary CPU
The CPU chosen to be the primary CPU in a QBB.