> For those in Bacula DVD userland who are using DVD+RWs, it strikes me as if > 1,000 overwrites is really not all that bad. For example, if I have a > dedicated DVD+RW disc for incremental backups that I re-use (and blank out > completely) once every Wednesday (such as in between Full backups run once > every Sunday), that's about 52 Wednesdays per year (and about 1,000 > read/write mounts gets me about 19 years). Unless of course one has to > conduct numerous restores from the Wednesday DVD+RW disc, how would this > "add up quickly"? Do Bacula sys admins who are using DVD+RW media re-use the > same discs for many days of the week ( e.g., appending incrementals to the > same disc for, say, an entire week or more)? I might be missing something as > I'm a bit bleary eyed from too much Bacula DVD testing today. > I use a lot of DVD+RW and I can say that with DVD players DVD+RW media becomes useless in less than 100 passes but this media is still good enough for data as long as you read it on the writer that burned it. I think the one thing that you are not considering here is that with bacula the whole dvd is not written in one pass and so it gets mounted a few times during the write operation. I believe this process will reduce this 1000 number significantly but I have never tested that.
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