On Wed, Dec 26, 2012 at 08:38:54AM -0500, Gene Czarcinski wrote:

I know that I can find out what btrfs "volumes" are on a system with
the command:
     btrfs  fi  show

I can also check if a partition of disk is a btrfs volume with the command:
     blkid  -o value -s TYPE /dev/<disk|partition>

And, if I mount that btrfs volume with something like:
     mount -t btrfs /dev/<btrfs>  /mnt/btrfs

The, I can get a list of btrfs subvolumes on that volume with the command:
     btrfs  subvolume  list  /mnt/btrfs

My question:  Is there a way of finding out what subvolumes are
defined on a btrfs volume without mounting the volume?

   No. (Well, in theory the code is possible, but there's nothing I'm
aware of that will do it)

   Hugo.

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