main new features:
* Multipath device support is now integrated into the hotplug infrastructure of the system
* Dual core CPU support for latest AMD64® & Intel® EM64T® processor and Intel Itanium2
* IBM POWER systems benefit from NUMA support.
* IBM zSeries reduces CPU usage by using TCP segmentation offload for OSA Express Cards.
* CRKM (Class based resource management) is extended by three new controllers
* Increased database performances can be achieved by using shared memory segments
* The system boot process performance has significantly increased
* Root partition can now be located on LVM volumes residing on RAID volumes.
* OCFS 2 or OCFS2 cluster files system has been included to support Oracle RAC
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