NonStop S-Series Planning and Configuration Guide (G06.27+)

Terms and Concepts
HP NonStop S-Series Planning and Configuration Guide—523303-019
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CRU Identification, System Enclosures
CRU Identification, System Enclosures
Customer-replaceable units (CRUs) are hardware components that can be serviced
and replaced by customers. Not all components in a system enclosure are CRUs.
CRUs are identified by their physical location in a processor enclosure or I/O
enclosure: their group, module, and slot numbers.
Group
A group consists of all components accessible to a pair of service processors (SPs) in
a system enclosure. In NonStop S-series servers, an enclosure contains one group.
Module
A module is a set of components that shares a backplane. In NonStop S-series
servers, a group contains one module. In contrast, HP NonStop Integrity S4000
servers, which also implement ServerNet architecture, have several modules in a
group.
Slot
A slot is a physical, labeled space in a module in which a CRU can be installed.
CRU Identification
CRU locations in a system enclosure are identified by group, module, and slot:
Identifier Use
Label on
Appearance Side
Label on Service
Side
Group
number
Identifies the group (the system
enclosure) containing the CRU.
Visible through
faceplate on
appearance-side
door.
On leftmost cable
support and on
service-side door,
if present.
Module
number
Identifies the module within the
group. The module number is
always 01 for system enclosures,
and 02 and 03 for IOAM
enclosures.
Inside the
enclosure near the
fans.
On rightmost cable
support.
Slot number Identifies the slot within the
module.
Near the slot. Near the slot.
Note. Some software uses an abbreviated notation for group, module, and slot. For example,
TSM displays the location of a fan CRU in the form:
FAN.GRP-1.MOD-1.SLOT-26
OSM displays the location of the same fan CRU in the form:
FAN (1.1.26)