Re: mdadm 3.3 fails to kick out non fresh disk

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On 09/14/2013 05:06 PM, Francis Moreau wrote:
> Martin,
> 
> On Sat, Sep 14, 2013 at 4:33 PM, Francis Moreau <francis.moro@xxxxxxxxx> wrote:
>> On Sat, Sep 14, 2013 at 12:38 PM, NeilBrown <neilb@xxxxxxx> wrote:
>>> On Sat, 14 Sep 2013 00:35:47 +0200 Francis Moreau <francis.moro@xxxxxxxxx>
>>> wrote:
> 
> [...]
> 
>>>
>>> BTW I think I've fixed the issue with mdadm -R /dev/md125 for DDF.
>>> Try the latest git.
>>
>> It seems it fixes the issue: mdmon is now correctly started with a
>> degraded DDF array.
>>
>> However, after using the system with only one disk (sda), sdb is now
>> outdated. I rebooted the system with 2 disks but mdadm doesn't seem to
>> notice that sdb is outdated:
>>
>> # mdadm -I /dev/sda
>> mdadm: container /dev/md/ddf0 now has 1 device
>> mdadm: /dev/md/array1_0 assembled with 1 device but not started
>> # mdadm -I /dev/sdb
>> mdadm: container /dev/md/ddf0 now has 2 devices
>> mdadm: Started /dev/md/array1_0 with 2 devices (1 new)
>> # cat /proc/mdstat
>> Personalities : [raid1]
>> md126 : active (auto-read-only) raid1 sdb[1] sda[0]
>>       2064384 blocks super external:/md127/0 [2/2] [UU]
>>
>> md127 : inactive sdb[1](S) sda[0](S)
>>       65536 blocks super external:ddf
>>
>> So this time mdadm fails to kick out non fresh disk (when using '-I')
>> but with DDF.
>>
> 
> Maybe you have an idea on why mdadm doesn't notice that sdb is
> outdated in that case (DDF) ?

It's a bug. I am sending a patch soon. Thanks a lot.

Martin


> 
> Thanks

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