NonStop NS-Series Planning Guide (H06.05+)

Modular System Hardware
HP Integrity NonStop NS-Series Planning Guide—529567-008
5-30
Terminology
Terminology
Terms used in locating and describing components are:
Term Definition
Cabinet Computer system housing that includes a structure of external
panels, front and rear doors, internal racking, and dual PDUs.
Rack Structure integrated into the cabinet into which rackmountable
components are assembled.
Rack Offset The physical location of components installed in a modular
cabinet, measured in U values numbered 1 to 42, with 1U at the
bottom of the cabinet. 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 (or bays). 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 Bay 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.
NonStop Blade Complex A set of two or three NonStop Blade Elements, identified as A,
B, or C, and their associated LSUs. Each NonStop Blade
Complex usually has four logical processors. A 16-processor
system employs four NonStop Blade Complexes. See NonStop
Blade Complex on page 4-2.
NonStop Blade Element 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 An component of the system that 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.