Oddbean new post about login | logout what are you using for storage?
was using a hdd, switched to a 4tb ssd recently. I suspect it was due to a low dbcache (32) value but not sure yet
did not see until after that you swapped storage. if you do in fact have an intermittent hardware problem the best way in my experience is to swap parts where you can. since you have the storage out of the way, if you have multiple memory modules I would run one at a time and see how that turns out