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That looks like damage to the plastic coating, blast from the past, but you could just throw them in a resurfacer if you can find one, every resurface will be less reliable than the one before it though.
May not be worth it, how old are these? My knowledge is maybe out of date, but if it’s a dvd-rw opposed to a generic dvd-r, the usable lifespan used to be pretty limited. In theory, manufacturers claim 10-25 years based on their accelerated testing methods, but in actual lifespan, some data hoarders were seeing numbers average as low as 2 years for large collections. No good studies out there I’m aware of though. I used to have all of my media on dvd-rs and almost all of mine were showing read errors after 5 years, even the ones from the good manufacturer, this was back in… 2010ish.
That looks like damage to the plastic coating, blast from the past, but you could just throw them in a resurfacer if you can find one, every resurface will be less reliable than the one before it though.
May not be worth it, how old are these? My knowledge is maybe out of date, but if it’s a dvd-rw opposed to a generic dvd-r, the usable lifespan used to be pretty limited. In theory, manufacturers claim 10-25 years based on their accelerated testing methods, but in actual lifespan, some data hoarders were seeing numbers average as low as 2 years for large collections. No good studies out there I’m aware of though. I used to have all of my media on dvd-rs and almost all of mine were showing read errors after 5 years, even the ones from the good manufacturer, this was back in… 2010ish.