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

2.15
Understanding Component Numbering
InForm OS Version 2.2.4
3PAR Confidential
2.3.5 Drive Chassis Numbering
Depending on the specific configuration, a storage server can include up to 64 drive chassis. A
drive chassis houses two drive cages where each contains five drive bays. Each drive bay can
accommodate a single drive magazine holding four disks for a total of 20 disks per drive cage
and 40 disks per drive chassis.
Numbers for drive chassis are assigned:
■ beginning with 0.
■ from bottom to top, beginning with the drive chassis directly above the storage server
backplane.
Drive chassis are always placed above the storage server backplane enclosure and numbered
according to their position in relation to the backplane, as shown in Figure 2-15.
Control Cache DIMMs
control cache
data cache
0,1
0,1,2,3,4,5,6,7
left to right*
Data Cache DIMMs
Bank 0
Bank 1
Bank 2
0,1
0,1
0,1
top to bottom
* When facing the storage server.
Table 2-3. Numbering System for Controller Nodes and their Components (continued)
The Following Components... Are Numbered... Running from...