Since I have a stack of rewritable optical media sitting here that hasn't been touched for a while. So, I was giving some thought on how best to test RW media (CD-RW, DVD-RW, others) to see whether it is good or not. Of course, I don't want to have to find out the hard way by trying to use it and come back with errors. I don't really want to throw these out, and the topic is interesting to me. One thing I do think is that it can be useful to have some form of "Scandisk" that will work in such a situation, but that isn't necessarily feasable on a write-once media (I think they only do it with UDF anyway), so I was thinking of some ideas. The best idea I had in mind: 1) Generate a file the exact published size of the media. What would be the best contents of the media? Would multiple files be better? 2) Burn those files to the media at the top rated speed of the media. 3) Check the files (compare them either against the originals or MD5 them). 4) Erase the disk. Of course if any errors come in the process then it is considered to be bad media. Any other thoughts or better approaches to take? (I apologize if this isn't the right forum, it seemed the best given the list)