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Re: [linux-lvm] LVM ext3 support



On Fri, 2003-10-17 at 14:44, AJ Lewis wrote:
> On Fri, Oct 17, 2003 at 01:17:20PM -0500, anthony mayes wrote:
> > I am running Redhat 9 with kernel 2.4.20-20.9.  I am getting the 
> > following errors when trying to mount an LVM snapshot:
> > 
> > EXT3-fs: INFO: recovery required on readonly filesystem.
> > EXT3-fs: write access unavailable, cannot proceed.
> > 
> > I saw a thread on redhat.com that said a kernel patch is needed.  My 
> > question is where can I get the patch for this kernel, how do I install 
> > it, and why isn't this built into the kernel in the first place?  Any 
> > other suggestions are welcome.
> 
> Looks like you don't have the VFS-lock patch installed. something like
> linux-2.4.20-VFS-lock.patch, but i don't know what it would be for
> Redhat's patched kernels.

I've run into this, too.  You have to umount the filesystem before you
make the snapshot, eg:
umount /home
lvcreate -L 1G -n homebak /dev/vg/home
mount /home

With XFS (which I haven't tested), you can run xfs-freeze to commit the
journal without umount, but with ext3 the only way to commit the journal
is to umount the filesystem...
-- 
David Johnston <david littlebald com>
Little Bald Consulting, LLC



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