Hi everyone, when i issued the following command: pg_dump -d mydb -Fc -Z9 -U dbadmin > base_backup.tar i keep getting warning messages: pg_dump: [custom archiver] WARNING: ftell mismatch with expected position -- ftell used. Do i have to be worried about that, i.e. can it happen that the backup did not work? Mainly because my db is around 100GB and the tar file was just 4.5GB. I mean, i don't mind such a good compression but with the warning messages i got, i am a little bit confused as to whether it really worked. Thanks! Chris Christian Rengstl M.A. Klinik und Poliklinik für Innere Medizin II Kardiologie - Forschung Universitätsklinikum Regensburg B3 1.388 Franz-Josef-Strauss-Allee 11 93053 Regensburg Tel.: +49-941-944-7230