NonStop NS-Series Planning Guide (H06.03+)

Modular System Hardware
HP Integrity NonStop NS-Series Planning Guide—529567-004
2-28
Terminology
Terminology
Terms used in locating and describing components are:
On Integrity NonStop NS-series systems, the location of the physical and logical
modular components are identified by:
•
Physical location:
°
Rack number
°
Rack offset
•
Logical location: GMS notation determined by the position of the component on
ServerNet
Term Definition
Cabinet Computer system housing that includes a structure of external
panels, front and rear doors, rack, and dual PDUs.
Rack Structure inside the cabinet into which rackmountable
components are assembled.
Rack Offset The physical location of components installed in a rack,
measured in U values numbered 1 to 42, with 1U at the bottom
of the rack. A U is
1.75 inches (44 millimeters).
Group A subset of a system that contains one or more modules. A
group does not necessarily correspond to a single physical
object, such as an enclosure.
Module A subset of a group that is usually contained in an enclosure. A
module contains one or more slots. A module can consist of
components sharing a common interconnect, such as a
backplane, or it can be a logical grouping of components
performing a particular function.
Slot (or Position) A subset of a module that is the logical or physical location of a
component within that module.
Port A connector to which a cable can be attached and which
transmits and receives data.
Group-Module-Slot
(GMS)
A notation method used by hardware and software in NonStop
systems for organizing and identifying the location of certain
hardware components.
Processor Complex A set of two or three processor slices identified as A, B, or C
and their associated LSUs. Each processor complex usually
has four logical processors. A 16-processor system employs
four processor complexes. See Processor Complex
on
page 1-3.
Slice A physical portion of a logical processor containing up to four
processor elements, Each processor element supports a
different logical processor numbered 0-15.
LSU Synchronizes the processor elements of a logical processor and
validates all output operations from each processor element
before passing the output to the ServerNet fabric.