StorPool Distributed Storage (StorPool) supports magnetic disks (HDD), solid-state drives (SSD) as well as NVMe. Different types, models and size of storage devices can be mixed in a storage node.
Each StorPool node can have up to a maximum of 500TB of storage attached. The storage capacity can be entirely based on magnetic disks, solid-state drives, or a mix of both storage media types. Typically an StorPool NVMe storage node has 10x 8 TB NVMe, resulting in 80 TB raw per node.
StorPool provides minimal hardware requirements in its StorPool Distributed Storage (StorPool) documentation.