HP 3PAR InForm OS 3.1.1 Messages and Operators Guide

Understanding Component Numbering
Because of the almost unlimited number of potential configurations, there is standardized component
placement and internal cabling to simplify installation and maintenance. For this reason, system
components are placed in the cabinet according to the principles outlined in this section and
numbered according to their order and location in the cabinet.
Cabinet Numbering
The F-Class Storage System 2M (40U) cabinet is an EIA-standard rack that holds storage system
components. Numbers for chassis bays are assigned beginning with 0, from top to bottom.
Figure 22 (page 26) illustrates numbering of chassis bays in an HP 3PAR cabinet.
Figure 22 Numbering of Chassis Bays in the Cabinet
A storage system can be housed in a single cabinet or multiple cabinets. When multiple cabinets
are required, the first cabinet (the controller node cabinet ) holds the backplane populated with
controller nodes. Any additional cabinets, or drive chassis cabinets, hold the additional drive
chassis that do not fit into the controller node cabinet.
26 Component Numbering for F-Class Storage System