I'm facing this too recently when my son starts playing any game on Windows VM (GPU Pass-Through). Otherwise everything works fine for days! Latest BIOS updated. Unraid 6.9.1 updated. Used two suggestions from discussion topics:
amd_iommu=pt nvme_core.default_ps_max_latency_us=0
But still no difference.
I'd occasionally get messages about cache disk temperature rising to 56-57 deg and then sometimes it resulted in cache disk going missing when it crossed 60 deg. But now, there is no temperature indication what-so-ever and as soon as game is turned on within 3 mins the cache disk goes missing. Please help.
kraken-diagnostics-20210329-1303.zip