nvme drive disappears after about an hour of uptime

[codebreaker]

I no longer think that heat is my problem. I returned the two Intel drives and bought a sarent Rocket Q  2tb drive, installed it, and have the exact same issue. 

After installing, I set up an ext4 partition, mount it, and then run the following command:

Code:

sudo dd if=/dev/zero of=/dev/nvme0n1p1 bs=1M status=progress conv=fdatasync

This is the one that hangs all the time. Not sure what to do next.