I have a dual boot system (Windows 10 alongside Ubuntu 20.04 LTS).
At the beginning, I had the same problem with Windows 10 where if I reboot the machine, the SSD won't be detected unless I shut down and turn on the PC. However, after doing a fix suggested to set the driver on Windows 10 to use Standard AHCI, the issue was solved on Windows 10.
Now facing the same problem but on my second OS that is Ubuntu 20.04. If I reboot the machine via Ubuntu, the SSD again won't be detected unless I shut down and turn on the PC again.
I spent several days trying to figure out why this happens on Ubuntu, reinstalled the OS, fixed the boot loader and verified that Ubuntu's boot is working properly in conjuction with Windows 10. I tried also a fix after that on Ubuntu that was meant for nvme based SSDs (obviously it didn't work since 870 QVO is not nvme based).
Just for reference, I'll post here the link for the fix made for the nvme based SSDs: https://askubuntu.com/questions/972200/bios-does-not-detect-ssd-after-reboot-from-ubuntu-16-04-dell-...
I couldn't find anywhere on the web a case where a person had the exact same problem with the exact same SSD model and type that I have. I have already reported a bug to Ubuntu on this but thought of also posting about the same here in the hope that someone from Samsung will actually see this and hopefully make a fix for this problem for Ubuntu.
If anyone has an idea why the SSD cannot be detected when rebooting Ubuntu in specific, I would be very happy. As mentioned above, the same problem took place on Windows 10 but it was fixed by switching to standard AHCI driver settings.
P.S. I have updated both BIOS and SSD's firmware already but the same results with Ubuntu at least. My Ubuntu's configurations are also set to AHCI mode.
