Hi, David, On Mon, Jun 10, 2019 at 02:29:40PM +0200, David Sterba wrote: > this patchset brings the RAID1 with 3 and 4 copies as a separate > feature as outlined in V1 > (https://lore.kernel.org/linux-btrfs/cover.1531503452.git.dste...@suse.com/). [...] > Compatibility > ~~~~~~~~~~~~~ > > The new block group types cost an incompatibility bit, so old kernel > will refuse to mount filesystem with RAID1C3 feature, ie. any chunk on > the filesystem with the new type. > > To upgrade existing filesystems use the balance filters eg. from RAID6 > > $ btrfs balance start -mconvert=raid1c3 /path [...]
If I do:
$ btrfs balance start -mprofiles=raid13c,convert=raid1 \
-dprofiles=raid13c,convert=raid6 /path
will that clear the incompatibility bit?
(I'm not sure if profiles= and convert= work together, but let's
assume that they do for the purposes of this question).
Hugo.
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