On Tue, Apr 7, 2015 at 7:09 PM, NeilBrown <neilb@xxxxxxx> wrote:
> 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.
>>
>
Awesome, the interrupted reshape has restarted! And in about 900 short
minutes I should be able to reshape back to a raid0.
Thanks again for all your help.
--
Jonathan
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