tarsnap: /folder: Couldn't visit directory: Permission denied

[Sven Richter <sveri80@googlemail.com>]

Hi,

I am trying to backup something and get this log message:

tarsnap: Removing leading '/' from member names
tarsnap: /postgres: Couldn't visit directory: Permission denied
                                       Total size  Compressed size
All archives                           7661631169       5593218938
  (unique data)                        5051231842       3768611408
This archive                                 2006             1425
New data                                     2006             1425
tarsnap: Error exit delayed from previous errors.


I wonder what this exactly means. I would assume it cannot read the
folder and therefore does not backup anything, however, it seems like
it does do a backup of some data. But of which? How do I check
everything works or works not as expected.
This is a bit confusing.

Best Regards,
Sven