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Glossary-3
Local testing Testing confined to the QBB on which the CPU doing the
testing resides.
Memory directory
module
See Directory module.
OCP Operator control panel; used by the operator to control
the system. It has a keyswitch, display screen, indica-
tors, and buttons. The keyswitch is used to power the
system up or down or to secure it from remote access.
The screen displays messages during booting. Indicators
show system state. The buttons reset or halt the system.
Partition A subset of a system’s CPUs, memory, and I/O subsys-
tem with a standard I/O module that runs its own copy
(instance) of an operating system. See also Hard parti-
tion, Soft partition.
PBM PCI backplane manager; monitors and manages the en-
vironment and components in the PCI box in which it
resides. The SCM can make requests of the PCI back-
plane manager.
PCI backplane
manager
See PBM.
PCI boxes Enclosures that provide 14 PCI slots (four PCI buses,
two four-slot buses and two three-slot buses).
System primary
PCI box
A PCI box that contains a standard I/O module, whose
system control manager (SCM) controls the entire sys-
tem. The system primary PCI box may also be a master
PCI box.
Master PCI box A PCI box that contains a standard I/O module, whose
SRM is the console for the system or partition to which it
is connected.
Secondary PCI
box
A PCI box that contains a standard I/O module and
which serves as a backup to the primary PCI box for the
system or the master PCI box for a partition.
Expansion PCI
box
A PCI box that provides 14 PCI slots but contains no
standard I/O module.