Bad Sector = Copy Protection?

I’m trying to make backup of games on DVD lately, and the backup DVD usually has bad sector (Nero Disc Scan) at file like 0000001.TMP. Is it due to copy protection?

And the drive I used (Liteon 165H6S, 851S, BenQ DW1650) can read the disc sometimes, but other time it read it as blank/unsupported format, or the reading LED keep flashing.

On another instance, the DVD burned by BenQ, the BenQ read the bad sector in the Disc Scan, but the Liteon doesn’t scan any bad sector.

I’m lost :doh: