Thanks guys, your suggestions were exactly what I needed. Jeremy On Jan 30, 2014, at 4:51 PM, Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote: > > On Jan 30, 2014, at 2:43 PM, Hugo Mills <hugo@xxxxxxxxxxxxx> wrote: > >> On Thu, Jan 30, 2014 at 09:27:55PM +0000, Maziarz, Jeremy M. wrote: >>> Everyone, here is a noob question: how do completely delete a btrfs filesystem (RAID10)? >> >> wipefs, on each device, is the precision approach -- it will very >> carefully damage the magic number in the first superblock on each >> device, which is enough to make most tools ignore the filesystem. >> >> Alternatively, the nuclear approach is simply to overwrite the >> first megabyte or so of the filesystem with zeros, with something like: >> >> dd count=1k bs=1k if=/dev/zero of=/dev/sda > > Yes with the older btrfs-progs, it indicates maybe equally old linux-utils so wipefs -a might not be up to date to delete all of the super block magics. It's worth knowing especially because mkfs.ext4 resurrects the latent btrfs back to life if the wipefs -a doesn't remove all super blocks. > > Also fwiw, it's possible to use wipefs -a /dev/sd[abcd] in a single command for all drives. > > > Chris Murphy > -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
