Re: Incompatibility of internal bitmap with ext4 barriers?

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On Tue, 17 May 2011 22:43:48 +0400
Jason Tinker <jsntinker@xxxxxxxxx> wrote:

> Do you have RAID5 over RAID0's or an ordinary RAID5? On my box
> ordinary RAID5 works perfectly too.

Yes, I ran RAID5 of 4x2TB+(1+1TB RAID0)+(1.5+0.5TB RAID0), recently changed to
RAID6 though, also replaced one of the RAID0s with another 2TB drive.

> If your configuration is also RAID5 over RAID0 and it works fine on
> 2.6.38 then I'll just wait for next ubuntu lts...

I am not saying you should just give up. The logs you posted seem like
they can be very helpful in tracking this down. But if it is indeed a kernel
issue, how do you fix or even debug it it without replacing/compiling a new
kernel, which is exactly what you do not want to do. And if you're already
replacing a kernel, why not try a 2.6.38 right away, to check if your issue is
already solved in there (after all 2.6.32 vs 2.6.38 are eons apart BOTH
mdadm-wise and ext4-wise).

-- 
With respect,
Roman

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