I've made some progress here. It appears that in my original configuration, the last session on a disk isn't readable, though bacula thinks that it is written properly. Here's why I think that, and my solution follows.
If I run a small, 50 meg backup job twice, then run a 5 gig backup job, my first dvd should contain files like dvd-0001.1 (first 50 meg backup), dvd-0001.2 (second 50 meg backup), and dvd-0001.3 (first part of 5 gig backup). The second disk should contain dvd-0002.1 (second part of 5 gig backup). After running a scenario like this, all jobs complete successfully, but if I mount the disks and list their contents, dvd-0001.3 is missing. Furthermore 'dvd-handler /dev/dvd free' shows the first disk mostly empty, minus the first two parts. The solution, was, as Richard (and the manual) suggested, to use the MaximumPartSize = 800M option to break the 5 gig backup into 800 meg parts. I'm unclear why this changes the job's outcome, but it does. The last Part on the DVD is readable, unlike with an unlimited MaximumPartSize. - Andy Richard Mortimer wrote: >> 1) Say we're migrating two jobs, with sized of 6 gigs and 1 gig, to >> DVDs. Bacula labels dvd-0001, writes the entire disk, the asks for >> dvd-0002. I insert a new blank disk, run the mount command, and then it >> writes the rest of the 6 gig job to dvd-0002. That Migrate job finishes >> successfully. Since the DVD isn't full, it's status is left as >> 'append'. Bacula now starts migrating the 1 gig job to DVD. At this >> point, it prompts me, "Please mount Volume "dvd-0002" on Storage Device >> "DVDWriter". The disk is in there, but I try running unmount and mount >> again. It prompts me for dvd-0002 over and over again now, and is stuck. >> >> 2) I'm under the impression that DVDs are read (for restoring data) by a >> normal filesystem mount? >> > That is correct. > > >> If so, this isn't working on my system, >> because when I mount (mount -t iso9660 -o ro /dev/scd0 /mnt/dvd), it >> mounts an empty, 350k filesystem. dvd+rw-mediainfo confirms that the >> entire disk has in fact been written to. >> >> > Did I read it right. You say that it mounts the filesystem ok but that > there is nothing in there? After the mount is /mnt/dvd an empty > directory? > > Before you go much further there are a couple of things that I can think > of: > > 1 - try ejecting the DVD and reloading it. Linux has a "feature" that it > doesn't rescan the block device after a write to the DVD. It may be that > the mount cannot see the data that has been written. An eject forces > things to get rescanned. > > 2 - One thing that is missing from your config is > MaximumPartSize = 800M; > that limits how big each entry (part) written to the DVD is. I don't > remember what happens if it is missing but it may be that it will just > fill as much as the DVD will take. Hence your first (and second) dvd > volumes may have been written without the need to mount the drive to > check space and hence bacula didn't notice a problem. > > Regards > > Richard > ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
