Paul Schyska <pschyska <at> googlemail.com> writes:

Jeff Schroeder <jeffschroed <at> gmail.com> writes:

quoted

You can find out the UUID with either of these commands
# blkid /dev/sda3
# vol_id -u /dev/sda3

Thank you for this info. 
blkid shows:
/dev/sda3: UUID="59d5f4f0-b746-4147-900c-a1ca0af47c85" TYPE="xfs"
while df -T shows:
/dev/sda3    btrfs    40001848  20046168  19955680  51% /mnt/sda3

how is that possible?

OK, it seems that i got some kind of cached information there. xfs was the fs
type before i remorfatted to btrfs.
After doing vol_id -u /dev/sda3 as root it shows
/dev/sda3: unknown volume type
and since then sudo blkid /dev/sda3
shows an empty line.
Also, blkid /dev/sda4 showed nothing befor but after
sudo vol_id -u /dev/sda4
sudo blkid /dev/sda4 show the correct:
/dev/sda4: UUID="0a7a1695-2e80-486c-ba38-f8d4598cb28b" TYPE="reiser4"