I'd like to assign different RAID levels to different subvolumes in my btrfs filesystem, eg have a subvolume /home that uses RAID 1 and a subvolume /var that uses RAID 0. Is that at all possible (if so, how?) or do I have to rely on separate filesystems / partitions to achieve this?
I've just cross-posted this question to the developers on linux-btrfs@kernel.org, and I've got the following answer from Hugo Mills:
No, not yet.
It's planned at some point (probably in the fairly distant future), but hasn't arrived yet.
answered Jul 14 '13 at 15:56
-m raid*options tomkfs.btrfsappear to take block devices as arguments as well. – Bratchley Jul 13 '13 at 15:12