Oracle Hardware Management Pack contains a collection of hardware management command-line tools for configuring RAID, BIOS, and Oracle ILOM and for updating firmware. It also contains an SNMP Plugin for monitoring. Oracle Hardware Management Pack also contains a daemon or service that communicates with Oracle ILOM over an internal channel to share inventory and health information about the server.
These tools and plugins are installed on your host operating system so you can perform system management tasks directly from the host. While the Oracle Hardware Management Pack provides useful features for managing an Oracle server, it is completely optional.
See the Sun Server Hardware Management Pack User’s Guide for more information about Oracle Hardware Management Pack capabilities to help determine whether to use and install it.
For general Oracle ILOM information refer to: http://www.oracle.com/pls/topic/lookup?ctx=ilom31