On 14/01/11, Jose Antonio Rodriguez Martin (jarodrig...@cgi.es) wrote: > I tried it and no longer works. I see that when I run: > # mt-f / dev/nst0 compression 1 > compression is enabled: > # tapeinfo-f / dev/sg5 > ... > DataCompEnabled: yes > ... > > But by launching the copy tape is uncompressed ... > Do not let the copy over 400 GB (800 GB compressed).
The tape device will attempt to compress the data. It will write to tape either the compressed data or the original depending on which is the smaller. Compressability is a function of the compression implementation and the data being provided to the tape system. Some data can grow in size after attempting to compress it. It is difficult to know how well any particular data will compress. We achieve about 30% compression on our LTO4 tape drive system using hardware compression. -- Rory Campbell-Lange r...@campbell-lange.net Campbell-Lange Workshop www.campbell-lange.net 0207 6311 555 3 Tottenham Street London W1T 2AF Registered in England No. 04551928 ------------------------------------------------------------------------------ Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
