Bug#612439: Acknowledgement (lvconvert --merge breaks Logical Volumes)

[Alasdair G Kergon]

What snapshot targets does your kernel contain?
(run 'dmsetup targets' and check for a line starting 'snapshot-merge')

(Error messages got improved in later upstream releases.)

Check your kernel message log for any related errors.

Run the command with -vvvv for more detailed information about what's going wrong.

Alasdair