(original article)

Re: A Nasty md/raid bug

28 August 2012, 06:14 UTC

> Worse - if you created the array with an older version of mdadm, then added a spare with a newer version then it is possible that different devices have different data offsets. If that seems to be the case it would be best to ask for help on linux-raid@vger.kernel.org as you'll need a special non-released version of mdadm to fix things up.

In fact, being able to specify the data offsets (at least at creation time) would be a very interesting feature when using metadata 1.1 or 1.2 with HD with specific alignment constraints. You can read more details in http://bugs.debian.org/614841

Can you consider adding such an option?

Regards, Vincent