What I have here is the result of two mounts of mp3 players, from different manufacturers, followed by the (edited) output from findmnt. What interests me is the source assignment. Any thoughts as to what might be causing this, or the significance of the change?
% mount UUID=4C2B-B6B0 /mt_test --options rw,user,umask=0000 `-/mt_test /dev/sdb1 ..................................^ % mount UUID=1874-44DE /mt_test --options rw,user,umask=0000 `-/mt_test /dev/sdb ..................................^