I have a 4 netapp h300s nodes that I'm looking to re purpose into some lab storage or another HCI Cluster. Its an supermicro 24 bay 2u server with 4 X10 Nodes containing dual 8 core e5 2620 v4 cpus, 256gb ram, and 6x 480gb ssds with a pair of 25g nics (and some Radian 8GB PCIE Nonvolitile ramdisks that can acheive 1million IOPS each, but are only 8GB). I had it running my vSAN cluster, however I migrated that to other hardware for some more capacity, so this guy opens up for another HCI solution to test. I already have a Nutanix HCI cluster as well as Azure Stack, so Id rather not have another one of those, along with vSAN. Some options I was thinking of are:

Truenas SCALE

Beg Netapp for the installers to bring this guy back to a H300S in either a 2 or 4 node config

Windows S2D

Any other options I am missing? Id like to dabble with other enterprise HCI solutions, even if they are storage only solutions, and Ive got the big 3 covered already (VMWare, Nutanix, and Azure Stack)