Unpopular Opinion
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The Library of Congress prefers vinyl because CD’s don’t last as long (with proper care).
At best a CD will remain uncorrupted for 20-30 years. In a climate controlled space-station like environment, maybe 100 years, but unlikely. Then it’s gone.
I have many 30 year old CDs. They’re fine. They’ve just been kept in a typical home storage environment. I just ripped a Toad the Wet Sprocket CD I bought in 93.
You claim induced me to do a little tidying on my CD collection. I just copied the oldest data CD that I own: the Hugo & Nebula Anthology 1993. It copied & verified no problem.
Unfortunately, that's probably the oldest proper test I can do. Although I was using CD-ROMs as early as 1986, e.g. in libraries, I didn't own any music or data CDs until about 1990. I could re-rip some of those old music CDs, I suppose, but I'm not sure it would tell us much as I'm not sure how to do a bit-for-bit comparison and I certainly don't want to listen to the files.
Same. I recently fucked up a server migration and lost my entire digital library, so I'm going through my CD collection and re-ripping them. Haven't had a single problem, and many are over 20 years old.
Very good - the stamped ones should last longer. Most of my cd-roms from that era are showing some bit rot.
So I'm getting a bit fascinated by this question, because I can do practical tests -- I've owned CD-Rs since the format was invented w/ the original Pinnacle SCSI CD writers circa 1994.
I don't think I have any CD-Rs that old any more, but I definitely have many from that era. Just for the heck of it, I popped an azo CD-R in my drive that I wrote in 1998, and I happen to have a hard drive copy of these files that I've carried forward on hard disks since that time as well (the CD-R was a backup).
I think the files are still in perfect condition -- was able to copy w/ verify all 360MB of MP3s (and yes, before you ask, I was making MP3s in 1998 using the Fraunhofer DOS command-line encoder), and compare them to my hard drive copies which show matching SHA512 hashes.
If I'm still around 25 years from now, I'll try again :-)
On one hand, it’s not a question of “if”, right, it’s only a question of “when”. Same for hard drives. The failure rate is 100%, eventually.
With analog media, one of the trade-offs is so long as the physical media is maintained, the information will be maintained. (Such as it is - another trade off is analog isn’t bit-for-bit true-to-source.)
Storage mediums like crystal and DNA are fascinating for that reason as well. A “permanent” digital storage doesn’t exist afaik.