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SubjectRe: bio too big - in nested raid setup
On 01/25/2010 04:25 PM, Marti Raudsepp wrote:
> 2010/1/24 "Ing. Daniel Rozsnyó" <daniel@rozsnyo.com>:
>> Hello,
>> I am having troubles with nested RAID - when one array is added to the
>> other, the "bio too big device md0" messages are appearing:
>>
>> bio too big device md0 (144 > 8)
>> bio too big device md0 (248 > 8)
>> bio too big device md0 (32 > 8)
>
> I *think* this is the same bug that I hit years ago when mixing
> different disks and 'pvmove'
>
> It's a design flaw in the DM/MD frameworks; see comment #3 from Milan Broz:
> http://bugzilla.kernel.org/show_bug.cgi?id=9401#c3

Hm. I don't think it is the same problem, you are only adding device to md array...
(adding cc: Neil, this seems to me like MD bug).

(original report for reference is here http://lkml.org/lkml/2010/1/24/60 )

Milan
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mbroz@redhat.com
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