Re: Bugreport ddf rebuild problems

[Albert Pauw <albert.pauw@gmail.com>]

Hi Martin,

I noticed another problem, with or without your patch, the problem occurs:

Zeroed the superblocks (just in case):
mdadm --zero-superblock /dev/loop[1-6]

Created the container:
mdadm -CR /dev/md127 -e ddf -l container -n 5 /dev/loop[1-5]

Created an md device in the container, it used /dev/loop4 and 
/dev/loop5, rebuild and finished
mdadm -CR /dev/md0 -l raid1 -n 2 /dev/md127

I fail one of the disks, it rebuild with one of the available unused 
disks in the container:
mdadm -f /dev/md0 /dev/loop4

I add another md device.
mdadm -CR /dev/md1 -l raid5 -n 3 /dev/md127

This last one is the odd bit, it is build using the previously failed 
disk. Looks like the container is not aware that /dev/loop4 has failed,
en reuses it. Which is wrong. So the failed status is not kept.

Regards,

Albert



On 08/03/2013 11:43 AM, Albert Pauw wrote:
> Hi Martin,
>
> I can confirm that patch 3/4 indeed fixed the problem.
>
> Thanks for your quick fix.
>
> Kind regards,
>
> Albert
>
> On 08/02/2013 12:37 AM, Martin Wilck wrote:
>> Hi Albert,
>>
>> On 08/02/2013 12:09 AM, Martin Wilck wrote:
>>> On 08/01/2013 11:13 PM, Martin Wilck wrote:
>>>> Can you please try the attached patch?
>>> DON'T use it, it's broken. I will send a better one in a minute.
>> My latest patch series should fix this. The fix for your problem is 3/4,
>> and I added your test case as 4/4. Retest is welcome.
>>
>> Martin
>>
>>>
>>>> Regards,
>>>> Martin
>>>>
>>>>
>