--On Montag, 29. Januar 2007 18:07 +0100 Cosimo Streppone <[EMAIL PROTECTED]> wrote:
>> Using DVD-RAM in combination with bacula is on my projects list. Is >> anybody actually doing this? > > Yes, I am doing this on my home Linux workstation. > I use a Samsung GSA-2164D dvdrecorder with a plain (no cartridge) DVD-RAM > disk. > I'm in the first stage of "try-and-see-what-happens" and I configured > DVD-RAM device exactly like a usb removable drive, with its mount > point `/mnt/dvdrecorder'. > I should only make sure that disc is already mounted when I start the > bacula job. > But that is easily solvable with a RunBeforeJob directive (or it should > be). Actually I would rather like to use DVD-RAM as a raw device. Just the way normal DVD-writing works. What's the point of having a filesystem with one file on it? ;-) Thanks for your post, though. I have not yet explored how to use raw block devices with bacula (tape only). DVD-RAM are random access. So, can I simply use Archive Device = /dev/mydvdram and Device type = file? I guess I just have to try it out. I'll let you know how it goes. > I found the DVD-RAM media to be somewhat slow when writing full > directory subtrees, but writing to a file like bacula does works > smoothly... This depends very much on the filesystem you use. Most filesystems store file meta-data in fixed places. Therefore the drive has to seek across the disc to update the meta-data when writing new files (or when making changes to the fs in general). This leads to bad performance and also makes the medium wear out faster at these sectors. Though I am wondering if the latter one is an issue with DVD-RAMs at all, because of automatic relocation of bad sectors and verification. If somebody has a deeper insight into this, I would be pleased to be enlightened. UDF was designed for use with (re-)writable optical media. It writes to the disc in a sequential manner. There is no need for the drive to seek across the disc and therefore you get better performance. AFAIK linux now has good support for UDF, so maybe you want to give it a try. Sadly, FreeBSD still only has read support. :-((( Regards, Georg ------------------------------------------------------------------------- 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
