Proxmox shows question marks VM won't boot up

[nir]

Hello

yesterday I shut down a server. When I tried to start it again, it wouldn't come up.
Error: storage is not online.
All other VM's are still running.
How to fix this?

 

[janssensm]

The version you are running is not supported, it's EOL, not just Proxmox VE, but Debian Stretch (it's the base) as well:
https://forum.proxmox.com/threads/proxmox-ve-support-lifecycle.35755/
So if you really want this system to keep running you should prepare an upgrade to version 6, instead of just focusing on fixing the question marks.

 

[apoc]

Fix the San connection, it indicates there is an issue.
Then upgrade.
I have had it in the past that issues only manifest themselves when a VM is turned off. That was esxi though...