NonStop NS2400 Series Planning Guide

On NonStop NS2400 series systems, locations of the 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:
Power Supply (100.2.15)
Rack and Offset Physical Location
Rack name and rack offset identify the physical location of components in a NonStop NS2400
series system. The rack name is located on an external label affixed to the rack, which includes
the system name plus a 2-digit rack number.
Rack offset is labeled on the rails in each side of the rack. These rails are measured vertically in
units called U, with one U measuring 1.75 inches (44 millimeters). A 36U rack or seismic rack has
36U with 1U located at the bottom and 36U at the top. A 42U rack has 1U located at the bottom
and 42U at the top. The rack offset is the lowest number on the rack that the component occupies.
The rack offset is the lowest number on the rack that the component occupies.
Blade Element Group-Module-Slot Numbering (NS2400T and NS2400ST Systems)
• Group:
In OSM Service Connection displays, 400 through 403 relates to blade complexes 0
through 4. Each blade complex includes a blade element and its associated processor.
Example: group 403 = blade complex 3
◦
◦ In the OSM Low-Level Link, 400 relates to all blade complexes.
Example: group 400 = any blade complex
• Module:
In OSM Service Connection displays, a module represents either the blade element or
the processor:
◦
– In a NonStop NS2400 series system, all blade elements are module 1.
Example: module 1 = any blade element
– 100-103 relates to processors 0-3
Example: module 102 = processor 2
◦ In the OSM Low-Level Link, 100 through 103 relates to processors 0 through 3.
Example: module 103 = processor 3
Component Location and Identification (NS2400T and NS2400ST Systems) 115