On Tue, Jun 18, 2013 at 11:42 AM, Caspar Smit <c.smit@xxxxxxxxxx> wrote: > Hi Mark, > > Stopping an MD device will not remove/delete anything. > The --remove command cannot be used AFTER an MD device is stopped. > (--remove is only for removing drives/partitions from a running MD > device NOT to remove the MD itself e.g. mdadm --remove /dev/mdX > /dev/sdb, furthermore a drive/partition can only be removed after you > fail the drive first or it has failed by itself offcouse, see the > --fail switch) > > To completely erase the MD you need to stop it and then remove the > superblocks from the member drives: > > mdadm --stop /dev/md127 > mdadm --zero-superblock /dev/sdb5 > mdadm --zero-superblock /dev/sdc5 > mdadm --zero-superblock /dev/sdd5 > > You can combine the last 3 commands to: > > mdadm --zero-superblock /dev/sd[b-d]5 > > but to be 100% safe use them seperately. > > This will erase the superblocks on the members of /dev/md127 and you > will not be able to assemble it again and it will not be started > during a reboot (remove it from the mdadm.conf too offcourse, but > since the array comes up as /dev/md127 I presume it is already not > present in mdadm.conf) > > Kind regards, > Caspar > Thanks Caspar. What you are saying makes more sense to me and is, as best I can tell, consistent with man mdadm. I've used this site a few times as it seems to come up a lot when Googling mdadm questions: http://www.ducea.com/2009/03/08/mdadm-cheat-sheet/ Apparently his instructions in #3 are incorrect. Cheers, Mark > 2013/6/18 Mark Knecht <markknecht@xxxxxxxxx>: <SNIP> >> >> mdadm --stop /dev/md127 >> mdadm --remove /dev/md127 >> >> to remove the raid1? <SNIP> -- 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
