Time to run fsck and hope for the best, disk might be dying. Invest in a UPS if you don't have one.
Then I would consider reinstalling (after backing up your VM configs, etc) and be prepared to
1) Replace the disk
2) Restore from backup
https://github.com/kneutron/ansitest/tree/master/proxmox
If you can boot the system, setup and run the bkpcrit script before reinstalling
Then I would consider reinstalling (after backing up your VM configs, etc) and be prepared to
1) Replace the disk
2) Restore from backup
https://github.com/kneutron/ansitest/tree/master/proxmox
If you can boot the system, setup and run the bkpcrit script before reinstalling
Similar advise in the other thread about, what looks like, the same issue: https://forum.proxmox.com/threads/pve-fault.147355/post-665671