Comment Let someone else worry about it (Score 1) 411
Don't bother messing about with tapes, it will be a full time job maintaining the library and space will be an issue after a while - I presume this is why you think it is impractical. With a proper data centre, you shouldn't have to worry about drives failing or the storage medium degrading due to age; most offer multiple site redundancy as well.
Seriously, don't get clever; save yourself the hassle and your business' reputation if something goes wrong with your 'lockbox' method.