In response to Jason King <[EMAIL PROTECTED]>: > I have an LTO2 drive with tapes that hold 200g native and 400g with > hardware compression. I have the hardware compression turned on on my > tape drive. I know because I went and manually made sure using the tape > tools that come with FreeBSD (The os the storage daemon is running on). > Last night my tape filled up with only 215G. I know it filled up because > I got a message to change tapes from the daemon. I didn't do anything > specific in Bacula to tell it to use hardware compression on the tape > drive because I didn't think I had to. I made sure hardware compression > was enabled in FreeBSD. My question is, is there a specific way to tell > bacula to take advantage of hardware compression? Perhaps a setting in > the storage daemon config file or the bacula director config file.
What are you backing up? That "400G with compression" is just an average. There's no guarantee that you'll get 2x compression. Personally, I find it false advertising, but nobody's listening to me. A few years ago (pre-Bacula for me) I set up a backup system for a company that did a lot of graphics work (lots of jpegs). They were really upset that their 400G tapes only held 200G. Reason is that jpegs don't compress, because they're _already_ compressed. If you're backing up a lot of pre-compressed stuff (like JPEGs, or PDFs or zipfiles, or MPEGs, or MP3s) you're _not_ going to see the 2x compression those tape manufactures advertise. The fact that you managed to get 215G on a 200G tape tells me that compression is working, but you're just not getting the 2x you were hoping for. -- Bill Moran http://www.potentialtech.com ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
