I am sure this is probably known already
I note that on removal of the DSM6 package (that i installed way-back-when(TM)) it didn't remove the /volume1/ChannelsDVRdata directory
not a big issue as I can rm -r it - however as the directory is not surfaced in the synology UI at all (at least not with the version i installed, i note on my new DSM7 unit it is displayed) it might confused some non-ssh using users to be confused why their storage isn't as empty as they expect...