[Ocfs2-devel] how to restore a reflink ?

[Joseph Qi]

On 6/10/22 3:18 AM, Lentes, Bernd via Ocfs2-devel wrote:
> Hi,
> 
> i have some Virtual machines running on an OCFS2 volume. 
> That means that their disk images reside on an OCFS2 volume.
> I needed to change something inside one vm and created a relink of it before.
> What i wanted to change went wrong. I need the reflink.
> 
> I have vm.raw and vm_before_configure.raw.
> vm_before_configure.raw is my reflink.

As the name hints, it seems vm_before_configure.raw is the source image
(good), while vm.raw is the dest reflink image (bad)?

If it is, discard the existing reflink vm.raw (better backup first), and
redo a new reflink vm.raw from vm_before_configure.raw will save much
time since your image is very big.

Thanks,
Joseph

> The files are quite big: 280 GB.
> 
> My planned procedure is:
> Stop Virtual machine.
> Copy vm_before_configure.raw somewhere else to vm_before_configure.raw.bak.
> Delete or rename vm.raw
> Rename vm_before_config.raw.bak to vm.raw
> Start the VM again.
> Hopefully be happy.
> 
> Is that ok ?
> 
> Bernd