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How to verify CD-R data retention over time?

Peter (Professor) Fo (956906) writes | more than 5 years ago

Data Storage 1

Peter (Professor) Fo writes "I've recently had two CD-Rs reported to me as faulty which are just 3 years old. This is worrying — I suspect the failure rate for this batch could be 10%. When researching CD longevity there is old and unreliable information; pious 'how to cosset your discs so they last 100 years' blurb; and endless discussions of what sort of dye to use, don't use cheap media, burn slower (or don't), but not much by way of hard facts besides there's a lot of data loss going on.

Does anyone know of a generic utility (win or *nix would suit me) that can map sector readability/error rates of CDs? I'd like to measure decay over time in my environment with my media and my other variables; and I expect others would too."

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DVDisaster (1)

MasterOfMagic (151058) | more than 5 years ago | (#25659951)

I used to use dvdisaster [dvdisaster.net] on all of the backups that I burned.

You can use dd to find the locations of the errors and then keep track of them over time.

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