I have Ubuntu 20.04 installed on my PC before (an SSD + an HDD), and recently a power failure damaged my SSD, and I alternated the SSD and re-installed the system with / and /boot in the SSD and /var, /home, and swap in the HDD.
It worked for about a week. But today I cannot boot the system and get messages like in the photo. (I tried many times and the messages are similar.)
Could you tell me what this message means and what to do to let my Ubuntu boot?
(By the way, I suspect the HDD has some problem, or the power line to support the HDD has some problem.)