>>>>> "Erich" == Erich Weiler <wei...@soe.ucsc.edu> writes:
Erich> Hi John, Erich> Thanks for responding! Reply below: Erich> I'm looking for a little advice on a setup I have here. I have Erich> 300TB of non-changing data that I need to archive. I have a Erich> Dell ML6000 tape library that holds like 41 LTO-5 tapes Erich> (connected to a CentOS 6 Server), and I have a pile of hundreds Erich> of tapes to do this job with. >> >> Quick question, how long do you plan on keeping this data? And how >> often do you plan on restoring it? If this is for an archive, which >> you expect to be usable for years and years, then I'd suggest that you >> >> a) make two copies of each set of data, bacula can do this. >> >> b) make sure you verify each tape that's written by reading it back, >> bacual can do this too Erich> Yep, we actually have two backup servers with two tape Erich> libraries to make two copies in parallel to reduce backup time. Erich> I didn't know it could read the tape back automatically after Erich> writing each one for verification; which directive in the Erich> config does that? It's in the bacula manual, and I think it's called 'verify' or something like that. Please note, it *will* slow things down, alot, since it now needs to re-read the tape and the filesystem chunk and compare them. So having multiple libraries will only get you back upto the performance of just one library without verification. Erich> The data will be archived conceivably for 15+ years. Although Erich> by that point I suspect we'll refresh our whole archive plan Erich> again because of LTO-5 shelf life limitations. ;) I thought LTO-5 had a decent shelf life rating, but just making sure you have reliable LTO-5 tape drives in 15 years might be the trick. Anyone still got DAT and/or 8mm drives that can read their old backups? *grin* Erich> This archive strategy is for DR only - we don't plan on doing Erich> restores at all for daily stuff. If we are restoring for any Erich> reason, something went horribly wrong... Yup. The key to tape longevity is nice stable temps and nice stable humidity levels. I'm sure any on the major offsite media vendors can happily provide this, at a cost. John ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
