3PAR InForm® OS 2.2.4 Messages and Operator's Guide (320-200119 Rev A, March 2009)

2.18
Understanding Component Numbering
InForm OS Version 2.2.4
3PAR Confidential
2.3.5.1 Drive Magazine Allocation
For highest availability and data protection, drive magazines are placed on different loops and
internal power domains by loading them in the order illustrated by Figure 2-18.
Table 2-4. Numbering System for Drive Chassis Components
The Following Components... Are Numbered... Running from...
Drive cages 0,1,... bottom to top
FC-AL modules 0,1 left to right
Fibre Channel ports
FC-AL 0
FC-AL 1
A0,B0
A1,B1
top to bottom
Drive magazines 0,1,2,3,4,5,6,7,8,9 left to right
Disks on the drive magazine 0,1,2,3 rear to front
NOTE: See the systems planning document or 3PAR Systems Assurance and Pre-
Site Planning Guide drive magazine allocation instructions specific to your system.