Unable to boot proxmox VM

[manouandry]

Hi all,

I have Centos-7.6 and Ubuntu-18.04 VM, They work fine after the installation.
But after few days, I am unable to boot the VM (No bootable Media Found) after a shutdown, or after a restore from backup.
When checking with Rescue Linux, i found that my partition table on VM was erased.

At the beginning I thin that it was due to a misconfiguration in the VM. But the same behavior on the 2 VM make me think that the problem is on Proxmox.

I use PVE 5.3-8.

What do you think about guys ???
Thanks

 

[t.lamprecht]

Proxmox VE does not automatically access VM volumes, especially not their content.

What underlying storage do you use, can you post the output of following commands:

qm config <VMID>        # replace <VMID> with real ID from both
pvesm status

Or do you re-used the VM disk image somewhere?

 

[manouandry]

thanks for your answer,

Of course, i have created template from both OS and I run many VM from the same template.
I've found workaround by dumping the MBR on a fresh instance (using DD) and restore it on the failed VM.
However, it's not safe to often rewrite MBR.

so, What may be the root cause ?

Here is the output for the Ubuntu VM:


For the Centos VM: