On Mon, 13 Oct 2008, Richerland Medeiros wrote: > How do I use the default compression hardware native of LTO4? > I have 1.4 TB of data and the tape is full when it comes to 900GB.
You are using the default compression already, else it would be full at ~795Gb Compression only works on compressable data. Whatever you are putting on the tape has already been compressed. 2:1 compression claims are very optimistic and must be dismissed as marketing puffery. Most of us find that the real average is 1.2:1 on a full backup and higher on incrementals (logfiles are _very_ compressable) The only safe way to estimate how many tapes are needed for any given backup is to use the native capacity of the tape. Compression is a bonus which means you may use fewer, but don't count on it. AB ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
