I can't find any photos of Rick Macklem's setup but it was developed in a fairly.. steampunk fashion.. on several obsolete i386 laptops with <4GB RAM.
https://www.pcmag.com/article2/0,2817,2135264,00.asp
https://www.panasas.com/
eg https://people.freebsd.org/~rpokala/2017-03-24.nvdimm.txt
I can't find any photos of Rick Macklem's setup but it was developed in a fairly.. steampunk fashion.. on several obsolete i386 laptops with <4GB RAM.