With 12 drives, two 4+2 R6 RAID groups will be formed. 8 of your 2 TB drives will be available for data. You will be able to get very, very close to 16 TB, but overhead will prevent you from getting all the way there. Also, if you want protection space for snaps or replicas, you'll need to add drives.
I need to create a share folder of 16 TB. How I can create?Suppose I have 12  2TB NL-SAS disks  Thanks
16 TB shared folder on VNXe