Passed 70+ drives and the yield is pretty good compared to others. Of the Smartbuy BD-R discs I've burned so far, I've found that less than 2% are defective (bad media). This is better than most other inexpensive media. PlexDisk isn't bad either. I found the Optical Quantum brand to be the worst, over 10% of them were bad and I will never buy this brand again.
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