> You may also need "mdadm --zero-superblock /dev/sda1" before the add > command. > > But if it's currently active in the array, why do you need to fail it? So this is the right way? mdadm --manage /dev/md0 --remove /dev/sda1 # remove failed disk from array mdadm --zero-superblock /dev/sda1 mdadm --manage /dev/md0 --add /dev/sda1 # add new disk to array (assumed same or greater space for partition) -- 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