physical interface
(PIF)
The hardware components that connect a system node to a network.
physical location A three-part identifier that specifies the group number, module number, and slot number of a
resource. For example: GRP-2.MOD-1.SLOT-8.
Physical view One of several views available in the view pane of the Management window. The Physical view
of a server is a view of all the enclosures and is intended to represent the actual floor plan at the
site. A Physical view of an enclosure is a visual representation of the physical location of supported
resources inside the enclosure. A Physical view of an Expand network is a visual representation
of the connections and resources within a network such as a ServerNet cluster.
See also Inventory view.
plug-in card A replaceable component that provides a unique function when installed in a CRU or FRU. For
example, plug-in cards for IOMF2 CRUs provide a choice of connection media for attaching
ServerNet cables.
port A physical connector to which a cable can be attached. The system transmits and receives data
or requests through ports. A port is also called a connector.
port name A 64-bit unique identifier assigned to each Fibre Channel port. The port_name is communicated
during the login and port discovery processes.
See also world wide name.
power domain A set of customer-replaceable units (CRUs) and field-replaceable units (FRUs) that share a set of
power rails.
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 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 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 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 operating system. The primary processor is the
processor that has direct control over the SAC.
See also backup processor.
primitive state The state of a PE that is not a member of the voting set of PEs. In this state the PE cannot perform
any I/O, voting or rendezvous. It may communication with other PEs using primitive communication
mechanisms.
problem incident
report
A type of incident report that notifies you of a problem on your server or ServerNet cluster. A
problem incident report is generated when changes occur that could directly affect the availability
of resources. Problem incident reports include the system configuration file and might include
other attachments, such as alarm logs and processor diagnostic information.
See also periodic incident report.
processor A functional unit of a computer that reads program instructions, moves data between processor
memory and the input/output controllers, and performs arithmetic operations. Processors are
sometimes referred to as central processing units (CPUs), but a NonStop server has multiple
cooperating processors rather than a single CPU.
processor board A board that contains the set of processor elements in a Blade Element.
processor complex The set of one, two, or three Blade Elements and their associated LSUs.
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