On Tue, 7 Apr 2015 16:24:35 -0700 "Jonathan Harker (Jesusaurus)"
<jesusaurus@xxxxxxxxxxxxxxxxx> wrote:
> On Tue, Apr 7, 2015 at 3:56 PM, NeilBrown <neilb@xxxxxxx> wrote:
> >
> >
> > Hmm... I think I see the bug. It should be easy enough to fix, but I'd like
> > to be able to test it.
> > Could you please:
> >
> > mkdir /tmp/md.metadata
> > mdadm --dump /tmp/md.metadata /dev/md/alpha /dev/md/beta /dev/md/gamma
> > tar czSf /tmp/md.tgz /tmp/md.metadata
> >
> > and then send me /tmp/md.tgz, which should be tiny and contain just the
> > metadata from the array.
>
> I'll send that to you once tar finishes.
Thanks. And just as well I tested as there was another problem.
I think it is all fixed now.
If you:
cd /tmp
git clone git://neil.brown.name/mdadm
cd mdadm
make
./mdadm -A /dev/md124 --force -vvvv /dev/md/{alpha,beta,gamma}
it should assemble the array and continue the reshape.
When it finishes it will leave the array as degraded RAID4.
Simply:
mdadm /dev/md125 --grow --level=0
and it will instantly become RAID0.
NeilBrown
>
> >
> > [[the patch which introduced the problem has a description which starts
> > "This is a bit of a hack and ..."
> > Never accept hacks!
> > ]]
>
> I've reviewed and accepted a few hacks in my day as well. Hopefully
> the cleanup isn't too ugly.
> Thanks again for looking into this.
>
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