Thanks, my confusion over your use of "copy protected" is because write protection is not copy protection. "A Copy protected disk/disc" is when you are prevented from copying files from, or when you are prevented from copying files correctly from a disk. Old Floppy disks were often Copy Protected to prevent piracy through making copies of the diskette.
Write Protection prevents writes to the disk. Obviously it also prevents copying files onto the disk, but the term "copy protection" as parlance only applies to the source; CD-ROM's are all "Write protected", for example, but only some are "Copy protected" to prevent being ripped or duplicated in some form.
Not intended as pointless pedantry since "Copy protection" is something that it would be a legal liability to help with- Thus Daves reply- "Write protection" is another story, though!
This is pretty cut and dry
Yep, barring a few specific causes, it's often a pretty easy to fix. I've successfully resolved the issue on 2 or 3 drives where it's occurred to me as well. Good to hear you found a solution on your own.