5 ms·
Restoring data from broken optical media
- java-man 12y agoQuote: "If a disc is broken in half, you've still got 99 percent of the data still there," Gogolin says. "The media is quite elastic and the data is pretty much intact up to the cut line. There is, of course, a region that is destroyed near where the disc has been cut. But for most part, you didn't destroy the data, you just made it unreadable because you can't spin the disc."
- pronoiac 12y agoOoh! And if you use parity encoding, like par2, that might be totally recoverable! Cool!
- duskwuff 12y agoYou don't necessarily even need that. There's some error correction built into the disc already.
- pronoiac 12y agoThis reminded me of someone retrieving data from a Cray hard drive with custom gear: https://blog.archive.org/2011/09/03/hard-drive-archaeology-and-hackerspaces/ https://blog.archive.org/2011/09/03/hard-drive-archaeology-a... It's cool seeing research into this.
- java-man 12y agoHa ha, this is so cool. Thank you.
- ams6110 12y agoQuick way to destroy a CD or DVD if you don't have a shredder is to pop it in the microwave for a few seconds. I have been gravely disappointed by the durability of optical media, particularly DVDs. At least in terms of resistance to accidental damage, in my experience video cassettes were far superior.
- gnud 12y agoIt wouldn't surprise me if your video casettes lost far more "bits" than your DVDs, but, being analog, it's not nessescarily noticable.
- stox 12y agoOne of the reasons LaserDisks are so durable, they're analog.
- java-man 12y agoSpeaking of tape. Apparently, still in use: http://home.web.cern.ch/about/updates/2013/02/cern-data-centre-passes-100-petabytes http://home.web.cern.ch/about/updates/2013/02/cern-data-cent...