Convert subvol disk to raw disk ?

[michaelj]

Hi all,

I would like to know if it's possible to convert "subvol root disk" to "raw root disk" for a container ?

Or is there an option to backup my container with subvol root disk in a raw format ?

Or is there an option to restore my backup of a container with subvol root disk in a raw format ?

Regards.

 

[LnxBil]

If you use ZFS (subvol suggests this), you need to create a filesystem and mount it as a directory in PVE.

​

Then you can backup your container and restore it to the storage (type directory):

​

Then you'll end up with a RAW file, that cannot be formatted, you to an error 144 while creating the filesystem. That's sad. I already filed a bug report (1437).

 

[michaelj]

Hi LnxBil,

Thanks for your feedback.

Let me explain to you all the steps.

I've upgraded PM 3.4 to 4.2 a few month ago, so i had to convert openvz CT to lxc CT.

Due to performance issue during restoration container, i've posted : https://forum.proxmox.com/threads/high-wait-io-after-and-load-average-upgrade-to-proxmox-4.25128/ .

So i've (re)restored all my openvz backup on PM 4.2 with this option : --rootfs local:0 in order to avoid bad performance.

Now i would like to know if its possible to convert an lxc backup containing subvol disk format to a raw image because i don't have anymore openvz backup for my container, only in lxc format.

I don't know if i'm clear ?

Regards.

 

[LnxBil]

Now i would like to know if its possible to convert an lxc backup containing subvol disk format to a raw image because i don't have anymore openvz backup for my container, only in lxc format.

A backup consists of files without any filesystem (for LXC), so you can restore it whereever you want and this is completely indenpendent of a filesystem.