drbill:Using the same CD drive? I have noticed that when I replace an older CD drive with a newer one (or a DVD writer), the older disks are not always readable.
Bill, the issue is the method of burning data on to the disks. From the info I have read/seen PC burners of both formats, CD & DVD, use a slightly different and cheaper technology then do disks burned by say Microsoft or another professional disk creator.
Proper storage of the media also is an issue.