Tauren I have a somewhat similar situation but have XP clients on workstations and laptops to backup as well as some Linux servers. The tape unit is a HP Dat 72x6.
I am trying to get Migration to work - nearly there. See below for other comments. Stephen Carr Tauren Mills wrote: > Hello, > > I've been using bacula for a couple years, backing up several servers > to an HP DAT40x6 autochanger. It has worked great! However, I had a > failure on my backup server and I've now rebuilt it, installing recent > bacula versions, and an additional large hard drive. > > So I now have a 500GB hard drive plus the HP DAT40x6 to work with. I > may add another big drive as well, but I'm not sure if I should make > it a 500GB RAID1 mirror, or just an extra 500GB drive for 1TB total > space. I'm curious what others would do with this kind of > configuration. I'm backing up about 8 servers, each with somewhere > between 15GB and 30GB of data. I haven't really checked, but I'm > guessing probably at least 1/4 if not more of the data on the servers > changes regularly (big log files, databases, etc.) > I have one 300GB drive to hold the Volumes prior to migration that is done twice a day one after the Laptops are backed up during the day and one after the workstations and servers at night - I want the data on tape in case the disc crashes. If I had another disc same size I would mirror it and not migrate incremental backups to tape. > I like the approach described in the URL below, where there is a full > backup on the 1st Sunday, differential on the other Sundays, and > incrementals all the other days. And there is a retention cycle that > makes sense. I'm not going to need nearly that long of a retention > cycle, and certainly don't have the space for that, but I'm thinking > of modeling my plan after this. > http://bacula.org/rel-manual/Automated_Disk_Backup.html I do Incrementals each day and Full backups once a week and have several Jobdefs so I can spread the Full backup load over the week. Total Full backup of all systems is 250+ GB. > So, do you think I should back everything up to the disk, and then on > a weekly basis backup the 500GB disk to the DAT40x6? Or somehow > backup just the more recent backups to DAT on a weekly basis? Or do > incremental tape backups of the 500GB disk every night? Or should I > backup to tape from the original servers and backup to disk, instead > of backing up to disk first, and then backing up the disk backups? > I'm really not sure what approach is best. I would use migration for the Full backups and leave the incrementals on disc if you are willing to take the risk - do the servers run some level of Raid? > The idea is that I'd like to rotate between two sets of 6 tapes, with > one set in the changer and one offsite. This is just in case of some > sort of physical problem, like the building burning down. I realize > the data could be up to a week old, but that is better than losing > everything. I archive one set a month of Full backups and place it off site never to be recycled. It has saved some person(s) from disaster. The cost of tape is far less than the cost of the data. > Lastly, what about compression? I understand it is better to not use > software compression on drives that do hardware compression > themselves. The drive I have is supposed to do 20GB uncompressed and > 40GB compressed. If I'm backing up to disk first, I want to compress > it with software. But then if I backup those backup files to tape, > what impact will the double encryption create? I do not use any compression and rely on the tape unit's built in compression. Windows data files do not compress well (already compressed) and I get about 40 to 50 GB per tape (native 36 GB). For Linux maybe 60+ GB per tape. > Also, any idea why I seem to only get about 17-18GB of data per tape, > even though each tape is supposed to hold as much as 40GB? I've tried > turning software encryption on and off. Do I have to do something to > tell the drive to use hardware encryption? I was getting file sizes of a max 17 GB on the 300 GB disc and then the penny dropped - I had partitioned the hard disc with a small block size of 1024 that I usually use on my Linux systems - I rebuilt the partitions using the default block size of 4096. Some Full backups of clients are 30+ GB. > > Thanks for the help! > Tauren > > ------------------------------------------------------------------------- > 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 > -- Computing Support WaterEd Pty Ltd. Level 1, 77 Grenfell Street Adelaide South Australia, 5000 Australia Tel +618-8236-5200 Fax +618-8236-5236 Email [EMAIL PROTECTED] ----------------------------------------------------------- This email message is intended only for the addressee(s) and contains information that may be confidential and/or copyright. 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