Different RAID Type in a pool is support with Flare 32. Since the array is CX4 you cannot upgrade to Flare 32. Unfortunately you are stuck with having the same RAID Type in a pool and you cannot mix it.
I have a question about mixing RAID types in thin pools with a CX4-240 w/ FAST and auto-tiering enabled. I have a raid group consisting of 6 200GB EFD's in RAID 5 that I would like to migrate to a thin pool. However, the Thin Pool I would like to use is setup as a RAID1/0. The pool has 4 300GB 15k FC, and 4 1TB SATA. Can I add these EFD's as a RAID 5? Or am I forced to use RAID1/0? I would prefer to use RAID 5 so I don't lose the EFD space which I have configured. Also, in regards to performance, this RAID group averages over 10k iops during a given day. Will migrating this to a thin pool impact performace greatly? Should I leave the LUNS configured for the highest tier? Or should I leave them alone? Any suggestions or comments would be greatly appreciated!
CX4 Tiering Pools - Mixed RAID?