#3 Prevent from cataloguing empty disks

open
nobody
None
5
2010-01-13
2010-01-13
Anonymous
No

Use case:
Disk doesn't mounted and user tries to catalogue it.

Problem:
Empty data is in the catalog and no warning is issued to user.

Possible solution:
Prevent empty disk from cataloguing and issue a warning to user.
Maybe provide command-line option to force the catalogization.

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