> I am running bacula 1.36.1 with Qualstar RLS-4445 autochanger and a single DDS > tape drive installed. The tapes used are all Sony SDX3-100C (100GB > native/260GB compressed capacity). I have noticed that VolBytes and VolFiles > values vary widely for tapes marked as Full in media list command (see > attached listing).
Getting between 126GB and 168GB on your 100GB tapes is absolutely normal (the other 3 tapes are a problem) assuming that you are not backing up the exact data every time. This compression rate is not outside the range of compression that I and of lot of others see. Remember compressed data will not compress a second time so reaching the magical 2.0 or 2.6 compression rate the manufacturer will assume that you have no compressed files (.zip, .jpeg, .mpg ...) in your backup or that if you do have some of these files then the bulk of your data is plain text files which are generally highly compressible. E.g., volume with MediaId 146 have only 30MB VolBytes and > 0 (sic!) VolFiles reported but still marked as Full, pretty strange. Another > one listed as Full has about 600MB and also 0 files. I agree with that. There is something wrong there. My first thought is that you had a setting that expired the volume after the fist job but then there would be at least 1 volfile written so this does not make sense. Have you ran the btape tests that are in the manual? http://www.bacula.org/dev-manual/Testing_Your_Tape_Drive.html#btape1 > Someone can suggest any > plausible explanation or is it more likely that something is wrong with the > catalog records? I doubt that as if your database were corrupt I would expect to see some really weird numbers. > How I can check the actual tape usage? I am not aware of a non destructive and reliable way of doing that. In normal operation Bacula writes to a tape until it either hits the end of the tape or an error. John ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
