On Wed, Sep 21, 2016 at 07:23:42PM +0200, Simon Becks wrote: > But this disk was not in the raid for almost 2 month. ? I'm not suggesting to use this disk. Well, not yet anyway. It might be an option if everything else fails... You posted this output assuming that the other disks were set up the same way, yes? In that case overlay + mdadm --create (with the settings you showed) is what you do. Regards Andreas Klauer -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html