Mark, His instructions at #3 are correct, #6 are incorrect (or someone has to correct me and knows the --remove will work on an entire MD device?). Kind regards, Caspar Met vriendelijke groet, Caspar Smit Systemengineer TB BV Dorsvlegelstraat 13 1445 PA Purmerend T: +31(0)299 410 475 F: +31(0)299 410 476 @: c.smit@xxxxxxxxxx W: www.truebit.nl 2013/6/18 Mark Knecht <markknecht@xxxxxxxxx>: > 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
