On Sat, 2007-01-27 at 13:25 +0100, Georg Altmann wrote: > > --On Freitag, 26. Januar 2007 20:27 -0500 cy tune <[EMAIL PROTECTED]> wrote: > > > On 1/26/07, Arno Lehmann <[EMAIL PROTECTED]> wrote: > >> Hello. > > > > Hi > > > >> On 1/27/2007 12:23 AM, cy tune wrote: > >> > Will DVD+R, DVD+RW, and DVD-RAM all work fine when I need multiple > >> > disks for each task? If a weekly backup needs 3 disks, will that be > >> > okay? Similarly for the other tasks. > >> > >> You mean, if you can mix the three media types? No. You can mix DVD+R > >> and +RW but DVD-RAM is treated differently. > > If I remember correctly, growisofs happily writes to a dvd-ram, as long as > your drive supports it. Please correct me if I'm wrong. > Well I have only tested -RW and -R but according to the growisofs manual page it supports -RAM (as well as +R and +RW). So I guess that the answer is that bacula can use any version.
Of course it would be good for users to send success stories so that we can say it with confidence. > > I didn't phrase it properly. I meant can I backup to several disks of > > the same type for one task? If my daily backup takes 2 DVD+R disks, > > is that okay? > > I'm not familiar with bacula dvd-writing... I leave this question for the > bacula-dvd-versed to answer. :-) > Yes that is fine. In that respect it works just like tapes. If one DVD fills it requests another DVD and continues to write the rest of the job on that. Note that at the moment you should make sure that only one DVD writing job runs concurrently. There are race conditions that will break things if two or more are writing. I don't have time to tackle those issues for the next couple of months but if anyone else wants to give it a go I'm more than willing to point them in the right direction. > >> > Is there any different setup you would recommend? I looked into tape > >> > drives but they are so expensive for the tapes and drives. > >> > >> The have much higher capacity, are more reliable, and more robust... I > > > > I'm not sure I would use the capacity though. > > > > It's about $8 per disk for a Verbatim double sided DVD-RAM disk (9.4 > > GB) in a cartridge. Going the tape route would cost far, far more > > wouldn't it? > > For small amounts of data (say a few GB) I would say this is true. DVD > devices are cheap. Though nothing beats tape media comparing price/GB, > still... > >From my perspective DVD wins hands down at the moment. I do the backup to a disk partition first and then migrate it to DVD when I'm available to swap disks. Incrementals go to DVD every night. I don't have enough data changing for incrementals to require a new DVD more than once or twice a month. Of course the fact that I don't have a tape drive connected to my machines is a small factor too! Regards Richard > >> prefer tape or, if offsite storage and the ability to endlessly add > >> storage count less than speed (and price) disk. > > > > I'm not concerned about speed of a tape vs DVD. I am price conscious > > at this point though. My old (unfortunate) method was a full backup > > every 6 months with no incremental backups. I'm now looking at using > > bacula for daily backups and weekly/monthly full backups. > > > > I had a tape drive on an older computer and never used it. It's > > capacity is so small compared to today's hard drives. It seems to me > > that by the time I would want to replace DVD-RAM disks, I would be > > ready to upgrade my tape drive to support larger capacity tapes. By > > the time I'm ready to replace the DVD-RAM disks, I could be buying > > blu-ray or hd-dvd or whatever is sufficiently cheap at the time. > > > > Let me know if any of this is wrong. :) I like the bacula manual as > > far as setting everything up. It looks clear how all the parts > > integrated and how to write a config file for each part. What's not > > clear is what backup media to choose and what kind of backup > > strategies people use. > > > >> > with the hardware verification? I'm not sure > >> > how to turn that on/off in Linux since it's just treated as a hard > >> > drive. According to the wikipedia entry, it will take about twice as > >> > long to write. > >> > >> Right, it takes longer and it's always on. This is not something you can > >> turn on or off, AFAIK. > > The built-in verification makes DVD-RAM the most reliable medium in the > DVD-zoo. Though it is also the slowest. I have seen far too many unreadable > DVD+RW discs. I wouldn't recommend these for backups. Double-sided DVD-RAMs > are also problematic. You cannot physically label them and its difficult to > handle them without making fingerprints. Either use a drive that handles > caddies or use single-sided discs. The former option is of course the > safest. > > I'm using a LG DVD-RAM drive with single-sided DVD-RAMs on my private > computer (Windows) for archiving data (not bacula). Using UDF seemed the > best option and I'm quite happy with it. No bad discs so far. > > Using DVD-RAM in combination with bacula is on my projects list. Is anybody > actually doing this? > > Regards, > Georg -- Richard Mortimer <[EMAIL PROTECTED]> ------------------------------------------------------------------------- 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
