On Wed, May 13, 2015 at 12:59:48PM +0200, Torbjørn wrote: > On 13. mai 2015 12:47, David Alcorn wrote: > >I run Debian Jessie with a kernel upgrade to 4.0.0 from the Debian > >experimental repository. My BTRFS-Tools remain at 3.17.-1 I wanted > >to convert a RAID0 array on /dev/sdb3 and /dev sdc3 from RAID0 to > >RAID1 so I ran the commands: > > > > mount /dev/sdb3 /mnt > > btrfs device add -f /dev/sdc3 /mnt > > btrfs balance start -dconvert=raid1 -mconvert=raid1 /mnt > > > >All appeared well with output similar to "395 of 395 chunks converted" > >but I think nothing happened. The array contains a subvolume @export > >with size (per "du -sh @export") of 442G. The pertinent output from > >"btrfs filesystem show" reports: > > > > Label: none uuid: 647eb0f8-7732-40bc-a4a4-0d1b31a8ae16 > > Total devices 2 FS bytes used 443.05GiB > > devid 1 size 1.36TiB used 223.03GiB path /dev/sdb3 > > devid 2 size 1.36TiB used 223.03GiB path /dev/sdc3 > > > >My array remains RAID0 if I understand the above output correctly. > >This output persist through a reboot and no data was lost. Where did > >I err? > > For info about raid levels, use "btrfs filesystem df <mount point>" > It should give you something like this: > Data, RAID1: total=12.97GiB, used=12.28GiB > System, RAID1: total=32.00MiB, used=16.00KiB > Metadata, RAID1: total=1.00GiB, used=334.53MiB > GlobalReserve, single: total=112.00MiB, used=0.00B If this still says RAID0, then you've probably hit a known (and since fixed) bug that stops restripe operations from working: http://www.mail-archive.com/linux-btrfs%40vger.kernel.org/msg43313.html Hugo. -- Hugo Mills | You can play with your friends' privates, but you hugo@... carfax.org.uk | can't play with your friends' childrens' privates. http://carfax.org.uk/ | PGP: E2AB1DE4 | C++ coding rule
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