What is the general best practice for keeping LTO 5 tapes in a rotation?
I have read that they have archival capability of 30 years, but I am sure this really depends on how much you're reading and writing to them during their service period, how they are stored, etc. Obviously we aren't going to be using them for 30 years here, but I seeem to encounter errors on them more frequently as they get older (2+ years), with no particular pattern. I've heard some IT folks say 2 years in a weekly rotation is about all you should expect to get out of them.
Should tapes be taken out of service after
- N number of years?
- N number of mounts?
- N Terabytes written to and read from?
- Any other type of metric?