this post was submitted on 25 Nov 2023
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Piracy: ꜱᴀɪʟ ᴛʜᴇ ʜɪɢʜ ꜱᴇᴀꜱ
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Well let's look at some actually verifiable data. I have optical discs of all generations (CD-R, DVD-R, BD-R) going back 20+ years that are still fine. They don't spontaneously decompose or anything. As long as they're properly stored I see no reason for them to stop working for another 20 years.
Do you periodically verify them?
I do sample them every few years out of curiosity. They mostly contain very old software and game kits from the late 90s and early 2000s so the data is only interesting for historical reasons. I also check them visually for disc rot but so far there hasn't been any. Which makes sense because they're not scratched, and they're stored inside CD wallets put inside boxes put inside a dry cupboard at room temperature so environmental contamination is not likely.
Weird my post is gone.
I have azzo verbatims that were tested after burn for pi /po /pie errors that went bad after 15 years despite being stored in black cases in a temp controlled room. It's not like the entire disc is gone but there are a few unrecoverable errors.
I bought archival azzo dye Dvd+r's and checked PIE errors after every burn to make sure they were as perfect as possible. The disc were stored in black cases in my basement at 70F.
It's 15 years later and I discovered those discs are going bad. I just spent the last 2 months recopying from original tapes (which now have more loss too). My new plan is live drives that can be checked with offline backup on magnetic drives and flash memory with lots of pararchive files for ecc recovery.