Re: Upgrade from Ubuntu 10.04 to 12.04 broken raid6.

On Sun, 30 Sep 2012, EJ wrote:

Fast forward to now, I've upgraded the system to 12.04 LTS and have lost 
access to my array. The array itself is a nine (9) disk raid6 managed by 
mdadm.

What version of kernel for 12.04 were you running?

If you didn't upgrade your kernel, you might have been hit by the bug 
described in:

<http://neil.brown.name/blog/20120615073245>

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se