VNXe - Pool expansion with dissimilar RAID 5 Configurations

Hi All,

Our VNXe 3200 is currently setup with RAID 5 (8+1) configuration. We needed to add additional capacity to our current pool so we have 7 SAS disks available to expand the pool. The amount of disks only allows for a RAID 5 (4+1). Am i able to have a pool that is all (8+1) and expand the pool using a RAID 5 (4+1)? Any help would be greatly appreciated.

Thank you,