HP 3PAR StoreServ 7450 Storage Installation Guide

I/O Modules
The I/O modules connect the controller nodes to the hard drives using a SAS cable, enabling the
transfer of data between the nodes, hard drives, PCMs, and enclosures. The I/O modules are
located at the rear of the drive enclosure. There are two I/O modules per enclosure, numbered 0
and 1 from bottom to top (see Figure 6 (page 15) and Figure 7 (page 15)).
Figure 6 M6710 I/O Module
Figure 7 M6720 I/O Module
NOTE: The I/O modules are located in slots 0 and 1 of the HP M6710 and M6720 Drive
Enclosure.
Power Cooling Modules
The PCM is an integrated power supply, battery, and cooling fan. There are two types of PCMs:
• The 580 W is used in the drive enclosures and does not include a battery.
• The 764 W is used in the node enclosures and includes a replaceable battery.
The PCMs are located at the rear of the storage system, and on the sides of the enclosure. There
are two PCMs per enclosure. The PCMs are numbered 0 and 1 from bottom to top and left to right.
Figure 8 PCM Numbering for HP 3PAR 7450 Controller Node Enclosures
Understanding Component Numbering 15