for Celerra gateways with CX4 backends and FC disks its still 4+1R5 or 8+1R5 (or 1+1R10  4+2R6 6+2R6 12+2R6)  for ATA disks you can also use 6+1R5 but not for Fibre Channel disks  Rainer
I've a new Celerra with CX4 backend, nas_version 5.6.47-11. Does the new Celerra still only supports FC RAID 5: 4+1 and 8+1? Or is a FC RAID 5: 6+1 also possible?
FC RAID configuration support