> It is but how often are you going to have to get it out to update it at 30tb? Back to MTBF you're taking a huge risk.
What's that got to do with the comment I replied to? I even specifically said "just not a very good one"
The comment was not about how good the backup scheme was, just if it was a backup or not.
A bad backup is still a backup, it's just, well, bad.
And if you were after a simple backup scheme, why would you 'update' it?
Make a new full copy and stick that in the safety deposit box. No 'update' required. And when it comes time for the next backup, get the oldest full backup out of the safety deposit box (so there is at least 1 newer set of backup media still there) and blat it and re-use the media for a new full backup.
We're not talking backups for multi-million+ dollar businesses that require auditable version histories of documents. For backing up a porn collection or family photos (hopefully not the same thing ahem), or resumes and receipts, it's perfectly adequate.
Otherwise I'd be talking about doing incremental forever (TSM né ADSM) to multi-offsite storagetek powderhorn 9310 tape libraries.