Marko,
We call rotation when you rotate through multiple backups or copies, primarily for off site backup. Refresh is when you move data from one generation to the next generation of storage media. Of course we all have our own terms.
One of the points I contend is that short of fire (which a fire safe can solve), analog is not susceptible to the same problems as digital. Dyes on optical media just deteriorate in time which can leave not one image, but thousands lost. Magnetic media is susceptible to not just magnetism, but ESD, brownouts, etc. And of course, a negative processed 50 years ago is still just as viable today as it was then, unlike digital.
Now don't get me wrong, I am not bashing digital, they both have pros and cons. I just get frustrated when people show all the pros of digital storage and fail to show all the cons (and there are a bunch!).
Allan
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