Bug#618463: mdadm: Mdadm grow of Raid1 destroys metadata

[Michael Gebetsroither]

On 2011-03-18 03:29, NeilBrown wrote:
> On Tue, 15 Mar 2011 12:45:19 +0100 Michael Gebetsroither <michael at mgeb.org>

Hi Neil,

first, thx for your explanation and answer to my bugreport!

>> Package: mdadm
>> Version: 2.6.7.2-3
>> Severity: grave
>> Justification: causes non-serious data loss
>>
>> Hi,
>>
>> mdadm --grow /dev/mdX --size=max shreded the second raid1 array here.
>>
>> Commands where as following:
>> lvextend -L +10G vda/opt
>> lvextend -L +10G vdb/opt
> 
> md was not made aware of these changes to the sizes of the individual devices,
> so

But how should i tell mdadm about the changes?
mdadm --grow /dev/md2 --size=max
Seems like the logical choice to update the size.