That’s not good.
We’ve had thousands of units update properly so far, coming back up to report their newly updated status, so this problem is not widespread. However, we have about 20 installs out of many thousands that are having this issue.
We are getting our hands on one of these units, so we can test a theory, but in the meanwhile:
I fear the SSDs that are dying. Every day, SSDs die. We see this happen with Nucleus and we see this happen with ROCK.
Because Roon OS runs in RAM, failures of the SSD that occur in the “start of the SSD” only are shown upon reboot. Because Roon OS devices rarely reboot, it can be months before the error is noticed. Because updates force a reboot, it’ll trigger a bunch of these failures to happen at once, thus we see clumps of SSD failures all around updates. If a large % of installs were getting errors, then we’d know it was a problem of the software itself, but ~20 out of many thousands points to hardware.
Your screenshot now shows that the installer can’t even find the SSD. Can you go into the BIOS and see if the BIOS can see the drive attached? If not, this is a hardware problem for sure (for your case at least).