Messages in this thread | ![/](/images/icornerl.gif) | | Date | Fri, 17 Oct 2003 18:58:42 -0200 (BRST) | From | Marcelo Tosatti <> | Subject | Re: LVM Snapshots |
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On Fri, 17 Oct 2003, Christoph Pleger wrote:
> ello, > > On Fri, 17 Oct 2003 09:12:30 -0200 (BRST) > Marcelo Tosatti <marcelo.tosatti@cyclades.com> wrote: > > > > > > I am using a 2.4.22 kernel from www.kernel.org together with an > > > > XFS patch from SGI. I want to use LVM for creating snapshots for > > > > backups, but I found out that I cannot mount the snapshots of > > > > journalling filesystems (EXT3, XFS, Reiser). Only JFS snapshots > > > > can be mounted. My research on internet gave the result that a > > > > kernel-patch must be used to solve that problem, but I could not > > > > find such a patch for Linux 2.4.22, so where can I get it? > > > > > > Marcelo decided not to apply that needed patch. Here it is for you > > > to play with :) ... It'll apply with offsets to 2.4.23-pre7. > > > > Because the patch touches generic fs code. > > > > Dont use LVM with XFS for now. > > I have used them together. The only thing that made problems at first > after applying the LVM-patch was that I did not know that the special > option "nouuid" is needed when mounting an XFS-Snapshot. But afterwards > I had no problem so far. > > So why do you think that I should not use XFS on a logical volume?
Because the filesystem code lacks locking somewhere (thats what the patches adds).
It seems its not safe to create snapshots of journalled fs'es without this patch.
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