On Fri, 10 May 2013 07:03:38 -0700
George Mitchell <george@chinilu.com> wrote:

> One the things that is frustrating me the most at this point from a user 
> perspective regarding btrfs is the current lack of virtual devices to 
> describe volumes and subvolumes.

From a user perspective btrfs subvolumes have a lot in common with just
regular directories aka folders, and nothing in common with (block)devices.
"Describing them with virtual devices" does not seem to make a whole lot of
sense.

-- 
With respect,
Roman