Oracle 11gR1 RAC in IBM p servers, VIOS or NOT

Hi,
Before IBM VIOS was certified by Oracle RAC last year, I always use two HBA ports and two NIC card ports on each node for redundancy purpose in the RAC implementation in IBM p series servers. I would like to hear other expert's opinion whether VIOS should be considered in the Oracle RAC.
Here are the pros and cons that I could think of for whether or not using VIOS in RAC:
Use dedicated HBA and NIC:
pros: the storage I/O and network throughput are guaranteed and predictable.
cons: additional cost, the LPAR can not be dynamically moved to another frame if needed (since HBA and NIC are attached to the LPAR)
Use VIOS:
pros: I/O Virtualization.
cons: the LPAR can be dynamically moved to anther frame if needed. RAC node I/O may be impacted by other LPARs that use same device.
You comments or suggestions are highly appreciated.
Thanks,
Limin.

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GC - 20091111_AA)
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Thank.-
Post Data: I search any solution in My Oracle Support, and apply the only solution found here. But the issue persist...

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cheers,
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http://erudans.blogspot.com

Oracle 11gR1 RAC in IBM p servers, VIOS or NOT

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