On 21 February 2017 at 13:44, Hideki Yamane <henr...@debian.or.jp> wrote: > On Tue, 07 Feb 2017 18:07:38 +0100 Robert Schindler <rob...@shajil.de> wrote: >> I tried to convert an ext4 file system to btrfs. The disk is 2 TiB in >> size with ~500 GiB used. The file system sits inside a LUKS container. > > It still happens with 4.9.1-1, tried to convert ext4 to btrfs, not on > LUKS. >
btrfs-convert is no longer supported / recommended upstream to use. I wonder if we should still ship it in Debian at all. You are much better off doing a backup and restore, to migrate from ext4 -> btrfs. See warning at: https://btrfs.wiki.kernel.org/index.php/Conversion_from_Ext3 Regards, Dimitri.
