> 
> >     I've just started using btrfs on all backup media. Btrfs can use LZO
> > compressions so is quite fast and I'm much happier with the compression
> > load on the sd rather than on the fd.
> 
> btrfs is still under development or I'm wrong?

Yes it is. It is highly recommended to use a recent kernel to get the most 
stable version possible. The FAQ 
(https://btrfs.wiki.kernel.org/index.php/FAQ#Is_btrfs_stable.3F) says to keep 
backups... a curious comment given our use case :)

I think the only major flaw is that running out of space can cause some 
problems that can be difficult to resolve, but this information may be out of 
date.

On the plus side, you get fast compression, and you are better protected for 
data corruption issues.

James
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