Owner manual

port
A physical connector to which a cable can be attached. The system transmits and receives
data or requests through ports on ServerNet adapters and processor multifunction (PMF)
CRUs. A port is also called a connector.
power domain
A set of customer-replaceable units (CRUs) and field-replaceable units (FRUs) that share
a set of power rails.
See also serial maintenance bus (SMB) domain.
power interface board (PIB)
A board mounted on the bulkhead located behind the power supplies in NonStop S7x000
and S7400 processor enclosures. The PIB provides electrical connection between the
power supplies and DC power cables.
power monitor and control unit (PMCU) FRU
A FRU (field-replaceable unit) that connects the batteries to the DC power distribution
bus in an enclosure and provides a means of disconnecting the batteries for powering off
the system. The PMCU also enables the service processor (SP) to diagnose the condition
of the associated fan and power supply and to regulate the voltage supplied to the fans. It
also provides the interface to the group identification switches and service LEDs. There
are two PMCUs in each group, one for each of the two DC power distribution buses.
power supply
In system enclosures without power shelves, the component on the processor
multifunction (PMF) customer-replaceable unit (CRU) or the I/O multifunction (IOMF)
CRU that converts standard AC line voltage into the DC voltages needed by the group
components in the enclosure.
In system enclosures with power shelves, the component located in the power shelf that
converts standard AC line voltage into DC voltage and delivers it to the PMF CRUs or
IOMF CRUs in that enclosure, which in turn supply the DC voltages needed by the group
components in the enclosure.
primary processor
The processor that is designated as owning the ServerNet addressable controller (SAC)
connected to separate processors running the NonStop Kernel operating system. The
primary processor is the processor that has direct control over the SAC.
See also backup processor.
problem incident report
A type of incident report that notifies you of a problem on your server or ServerNet