On Wed, May 13, 2015 at 12:11 PM, Hugo Mills <hugo@xxxxxxxxxxxxx> wrote: > 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: As far as I can see, it hasn't been fixed as of 4.1-rc3 yet, nor any patch to fix it was posted to this list yet (other than Omar's revert patch). > > 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 -- Filipe David Manana, "Reasonable men adapt themselves to the world. Unreasonable men adapt the world to themselves. That's why all progress depends on unreasonable men." -- 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
