The Software RAID level can be adjusted per volume and on the fly to meet data protection and replication requirements.
For most production environments, HPE recommends using Network RAID 10, which stores two copies of the data on the cluster. With this setting, the volumes remain online if you lose any single node in the cluster. From a capacity standpoint, you would need to take your capacity estimate based on your assessment of the applications and workloads above and multiply it by the number of copies you want. For Network RAID 10, this is a factor of two, because you store two copies of the data on this volume.
Modeling of availability and performance testing has shown that in most environments Hardware RAID 5 and Hardware RAID 50 can offer the best combination of performance, cost, and availability.
HPE, VSA [SDS]/12.7, x86
Protection Capacity Overhead, Reads/Writes, Data Availability