It's not recommended to create VDG in RAID 6 with more than 10 drives otherwise you need to face performance penalty.
In today's world performance is most important when it comes to storage world or anything.
Also keep in mind that power of 2 applies to data chunklet of RAID 5 or RAID 6 and it doesn't applies to parity drives chunklets.
Hope this helps!
Regards
Subhajit
I am an HPE employee
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