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 > $ sudo btrfs filesystem show > Label: none uuid: 0ee72c25-9169-4836-873d-468ebdea8c1a > Total devices 4 FS bytes used 92.00KB > devid 1 size 1.82TB used 76.02GB path /dev/sda > devid 2 size 1.82TB used 76.00GB path /dev/sdb > devid 3 size 1.82TB used 76.01GB path /dev/sdd > devid 4 size 1.82TB used 76.01GB path /dev/sde > > Btrfs Btrfs v0.19 Incidentally, this is a very old version of the userspace tools. If you're running this, it's quite likely that you also have a fairly old kernel, which may account for any other problems you might be experiencing... Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- ... one ping(1) to rule them all, and in the --- darkness bind(2) them.
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