Downgrade from proxmox 6 to 5

P

petrillo

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Mar 6, 2020
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We have an installed PVE 6.1 up and running, but having quite problems with the ZFS used there. A lot of thread are coming to the same conclusion: downgrade to 5.

So far so good...but before starting such an action, I'm wondering if the PVE backups from PVE 6.1 can be imported to 5.4? Anyone tried this?
 
t.lamprecht said:
What problems?
Click to expand...
As soon as we have intense file access, things are getting weird. Two examples:

Example 1

I tried to import an existing qemu-image using the commands:

qm create 110 --bootdisk scsi0 && qm importdisk 110 someImage.img someStorage (according to PVE documentation)

Then...

1. The importdisk task hung at 100%

2. All running VM's became unresponsive: ping was working, but no ssh and no local terminal

3. qm stop <vmid> could not stop ordinarly the VM. Only SIGKILL worked.

4. After that, qm start <vmid> could not start the VM (error "timeout waiting on systemd")

5. After a reboot of the PVE server everything run again as expected


Example 2

Today I tried to clone an existing VM (80GB). Same behaviour as described above.

For dmesg log and pveversion output see attached files.
 

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