>> umount /dev/sdb4 >> mdadm --build /dev/md0 --level=1 -n2 /dev/sdb4 missing >> mount /dev/md0 /mail >> mdadm --add /dev/md0 /dev/sda4 >> >> Will that work? Or am I misunderstanding something fundamental? > > It'll work but you'll be using a legacy array without superblocks, so you > can't have various features that come with superblocks Right; for this particular application I'm willing to give up superblocks. Just to be 100% sure, thought: the way I've described the process would be non-destructive of the data on sdb4? Thanks! -Ben -- 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