On Fri, Jul 15, 2011 at 8:28 AM, Paul Mather <p...@gromit.dlib.vt.edu> wrote: > On Jul 14, 2011, at 7:56 PM, Ken Mandelberg wrote: > >> Under Legato the license restriction artificially keep the "file-device" >> small relative to the tape storage. However, these days disks are >> cheaper than tapes and license free we could afford a lot of disk space. > > I know hard drives are cheap these days, but I didn't realise they were > cheaper than tape nowadays. LTO-4 media works out at less than 5 cents per > GB (uncompressed) last time I bought it, and I believe LTO-5 is less than 4 > cents per GB (again, uncompressed). > Large SATA Disks are cheaper for small setups where the cost of the tape drive / archive dominates. However if you consider power requirements of disks and that you should not backup to a single raid array but instead make 2 backup copies to different raid arrays (or sets of disks) on different machines possibly with one set offsite the disk price advantage diminishes for setups less than 20TB or so. > > But, don't underestimate some of the perhaps-neglected advantages of tape: > > - Easier to offsite for long-term archiving and disaster recovery > - WORM capability for regulatory compliance where needed > - Easier to expand total capacity---just buy more media > - Increasing capacity doesn't continually eat up rack space and drive up > power consumption > > Personally, I like the fact that Bacula supports a mixed disk/tape solution, > allowing for disk to provide faster near-line access to more recent backups > (e.g., incrementals) and tape for older material.
Agreed John ------------------------------------------------------------------------------ AppSumo Presents a FREE Video for the SourceForge Community by Eric Ries, the creator of the Lean Startup Methodology on "Lean Startup Secrets Revealed." This video shows you how to validate your ideas, optimize your ideas and identify your business strategy. http://p.sf.net/sfu/appsumosfdev2dev _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
