I’m quite new to all this, but have done quite a bit of reading recently. I’ve used CloneDVD with a NEC AD-5170A drive (capable of 8x speed with DL discs) to make a copy of a film on a Verbatim DVD+R DL (Singapore, ID:MKM 001) at 2.4x (certified speed). When I checked this with Nero CD-DVD Speed the Read test at maximum speed was 100% good, but the C1/C2-PI/PO test at 5x (recommended for my drive in the respective forum tutorial) gave a result of 97% good. I made another copy at 1x which produced a better result (98.2 good, 1,7 damaged, 0.1 bad) but still not perfect. My next move was to run the tests on the actual, brand new, original disc, as well as on a couple of older original ones, none of which produced a reading of more than 98.7% good either. Finally, I checked every disc again using VSO Inspector (both surface scan and file test) which gave a result of 100% good for all. So, what I’d really like to know is:
Is Nero CD-DVD Speed too ‘sensitive’, VSO Inspector too ‘insensitive’ or, perhaps, there isn’t such a thing as a perfect copy (or original) and I should be happy every time I get a reading above 98% or even lower with the former program?