The hardware RAID level that is applied depends on drive count in an individual node:
2 drives = RAID1
4-5 drives = RAID5
8-12 drives = RAID6
14-20 drives = RAID60 (2 per RAID6 set)
Product :
HPE, SimpliVity [HCI]/4.0.1 U1, 380
Feature :
Protection Capacity Overhead, Reads/Writes, Data Availability