Error detection determines if the data received through a medium is corrupted during transmission. To accomplish this, the transmitter uses a function to calculate a ...

I've gotten that on a few older CDRs I burned a few years ago .... and you're probably screwed AFAIK, assuming the disk isn't dirty or doesn't have a buncha fingerprints or something like that.

One of my hard drives has failed. It appears severely damaged, but not totally dead. I'm hoping to get some idea of whether or not what is on it can be retrieved. Here are the details and the current ...