I have a dual layer DVD (factory-pressed) that is completely physically undamaged.
But when error-scanning the disc, something happens towards the outer edge:
- 2×CLV: Nearly undamaged. Nowhere more than 2 PIF.
- 4×CAV: Around 3 PIF for the first 3000 MB, then increasing to around 20 PIF towards layer break (last 300 MB) and then 50 PIF after layer break, then descending back to normal.
- 6×CAV: Around 4 PIF for the first 3000 MV, then icreasing to around 60 PIF in the last ~300 MB towards layer break, then 110 PIF imminently after, then descending.
- 8×CAV: R.I.P. (150 PIF, 180 PIF)
Tested with multiple optical drives; similar results.
Has anyone else noticed this phenomenon? And what does possibly cause it?