NonStop NS14000 Planning Guide (H06.10+)

Terminology
These are terms used in locating and describing components:
DefinitionTerm
Computer system housing that includes a structure of
external panels, front and rear doors, internal racking,
and dual PDUs.
Cabinet
Structure integrated into the cabinet into which
rackmountable components are assembled.
Rack
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).
Rack Offset
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.
Group
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.
Module
A subset of a module that is the logical or physical location
of a component within that module.
Slot (or Bay or Position)
A connector to which a cable can be attached and which
transmits and receives data.
Port
A notation method used by hardware and software in
NonStop systems for organizing and identifying the
location of certain hardware components.
Group-Module-Slot (GMS)
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” (page 35).
NonStop Blade Complex
A physical portion of a logical processor containing up
to four processor elements, Each processor element
supports a different logical processor numbered 0-15.
NonStop Blade Element
A 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.
LSU
On Integrity NonStop NS14000 systems, locations of the physical and logical modular components
are identified by:
• Physical location:
— Rack number
— Rack offset
• Logical location: group, module, and slot (GMS) notation as defined by their position on
the ServerNet rather than the physical location
OSM uses GMS notation in many places, including the Tree view and Attributes window, and
it uses rack and offset information to create displays of the server and its components. For
example, in the Tree view, OSM displays the location of a power supply in a VIO enclosure in
group 100, module 2, slot 15 in this form:
66 Modular System Hardware