IBM i cannot add new drives to RAID 6

95 pts.
Tags:
AS/400
ASP
IBM i
iSeries
RAID 6
I'm adding 6 new drives of the same make/model into my IBM i V7R1. When I try to start RAID 6 parity, it will only provide me with the option for RAID 5. Why won't it allow RAID 6?

Software/Hardware used:
IBM i (iSeries), V7R1, 4 LPARs

Answer Wiki

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Check out the IBM site on raid configurations HERE.
It may provide the answers you are looking for.
IBM support helped me to track it down. The 6 drives are spread over two different controllers that are not partnered, which is why they cannot be added to RAID 6. I will be adding them in RAID 5 to a different ASP and use it for non-realtime libraries.

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