I've decided to do a real to-disk backup, after a couple recent data loss scares, and too many HDDs going south at once. So, of course I want to make sure my burns look good, so I scan them, and then compare to the scans threads, and...with new Sony MIT D21, and Verbatim MIT MCC 004, I was getting average PIFs from Kprobe in the 0.5-1 range, and also erratic error spikes (the spiky pattern is really what got me kind of worried). I was getting ready to ask questions more along the lines of, "did I get two bad media batches," or, "is my drive dying, now?"
After several more burns, though, the averages have gone to <20% what the first discs reported, and are now more in line with the poor/average results in the scans threads, the errors are more evenly spread over the discs, and the drive vibrates noticeably less when burning.
So, now that I'm getting scans that look more like they 'should', I have to ask: does a S203N have any kind of media code memory, to help calibrate better as more from a given batch are burned, or it is more likely that the drive just needed to do many burns and scans in a row to mechanically loosen some things up (it hasn't had a high duty cycle like this in at least a year)?