Small quibble, the original file system, named ext2_saved, is a subvolume/snapshot. As long as it's kept around, you can revert the conversion while losing any changes made to the Btrfs file system.
The comments explain the strategy in some detail. ReiserFS conversion is supported in addition to ext[234]. Because Btrfs requires only a little fixed space, just its superblocks, in theory any file system could be converted.
The comments explain the strategy in some detail. ReiserFS conversion is supported in addition to ext[234]. Because Btrfs requires only a little fixed space, just its superblocks, in theory any file system could be converted.
https://github.com/kdave/btrfs-progs/blob/master/convert/mai...