So you are claiming there is no bit rot on tape media? And that tape media doesn't fail? Tape drives need proper maintenance. So do libraries. They are sensitive to humidity. The get stale. Reclaiming them is difficult. Over time you must migrate from tape format to tape format.
Both systems work. But managing tape libraries and backups is a much more specialized skill then disks. People claim tape is fast. But they are comparing a single drive and cart to a single disk. Thing is each disk can move data. You can easily run into problems with multiple streams conflicting for drives in libraries. Etc Etc. This can totally be done but it requires a lot more thought then using disks. On Thu, Apr 17, 2014 at 8:40 AM, Atom Powers <[email protected]> wrote: > An LTO6 tape, at about 3TiB, is about $60 and will last five years on the > shelf before you "should" refresh it. > > A 3TiB HDD is about $100 and if you aren't running ZFS on it you can expect > some corruption from bit-rot within hours. With ZFS you either have to > worry about keeping all your disks together so you can re-create the zpool > or you will be doing a lot of drive swapping. > > With Tape you also get the benefit of a robotic arm to automatically swap > tapes in and out of the drive. A 32-bay tape library is about $6k. A 32-bay > drive chassis is $10k+ > > Even at small scale, tape has a considerable advantage for long-term > archive storage. > > > On Thu, Apr 17, 2014 at 7:18 AM, Chris Schafer <[email protected]> wrote: > > > Yeah I am pretty sure the math is bad for tape backups except at the > > largest scales where the power to spin the drives makes it more > expensive. > > Ideally you can find a system to spin the drives down. > > > > > > On Wed, Apr 16, 2014 at 11:11 PM, Michael Dexter <[email protected] > > >wrote: > > > > > On 4/16/14 2:03 PM, Paul Heinlein wrote: > > > > What sort of budget do you have? Do you need a library for > hotswapping > > > > tapes? Do you need multiple drives in said library? > > > > > > Large zpools to backup and sneakernets. It sounds like a basic unit > > > would be a good start an no, I didn't think I would ever think of tape > > > again, ever, ever. > > > > > > Thanks for all the suggestions. > > > > > > Michael > > > _______________________________________________ > > > PLUG mailing list > > > [email protected] > > > http://lists.pdxlinux.org/mailman/listinfo/plug > > > > > _______________________________________________ > > PLUG mailing list > > [email protected] > > http://lists.pdxlinux.org/mailman/listinfo/plug > > > > > > -- > Perfection is just a word I use occasionally with mustard. > --Atom Powers-- > _______________________________________________ > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug > _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
