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 2013/6/18 Mark Knecht <markknecht@xxxxxxxxx>: > I'm in the process of trying to clean up my home server. When I first > built the machine the main RAID was a partition-based 0.90 RAID1 which > is no longer used. I would like to get rid of this RAID (/dev/md127) > completely. What's the right way to do this? > > mark@c2RAID6 ~ $ cat /proc/mdstat > Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] > md6 : active raid5 sdd6[2] sdb6[0] sdc6[1] > 494833664 blocks super 1.1 level 5, 64k chunk, algorithm 2 [3/3] [UUU] > bitmap: 0/2 pages [0KB], 65536KB chunk > > md7 : active raid6 sdd7[2] sdc7[1] sdb7[0] sdf2[4] sde2[3] > 395387904 blocks super 1.2 level 6, 16k chunk, algorithm 2 [5/5] [UUUUU] > > md127 : active (auto-read-only) raid1 sdc5[1] sdd5[2] sdb5[0] > 52436032 blocks [3/3] [UUU] > > md3 : active raid6 sdb3[0] sdf3[5] sde3[3] sdd3[2] sdc3[1] > 157305168 blocks super 1.2 level 6, 16k chunk, algorithm 2 [5/5] [UUUUU] > > unused devices: <none> > mark@c2RAID6 ~ $ > > To I need to do anything more than: > > mdadm --stop /dev/md127 > mdadm --remove /dev/md127 > > to remove the raid1? Should I do something to zero out the partitions? > I expect to delete the partitions when this is complete and then grown > one of the other RAIDs to fill the area available. > > My eventual goal is to also get rid of the raid5 /dev/md6 and then > possibly combine md3 & md7 into a single raid6 partition. I just don't > want to take the whole machine down to do it where doing reshaping, > even if slow, works fine for me. > > Thanks, > Mark > -- > 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 -- 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
