Hi Neil, list You wrote: > mdadm -C /dev/md1 --assume-clean /dev/sd{a,b,c,d,e,f}1 Will the above destroy data by overwriting the on-disk v0.9 superblock with a larger v1 superblock? --assume-clean is not document in 'mdadm --create --help', by the way - what does it do? - 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