I was wondering if others scan a disc a couple of times or more if they see nasty PIF spikes just to see if it will go away? I have scanned a second time or more and found that sometimes the spikes will vanish while on other burns it will stay a constant (But vary in max value. Sometimes 10. Sometimes leaps to 20+).
I scan so often till I am satisfied with the result But seriously, if I encounter single bad spikes, I re-scan this part of the disc again to see if it was just bad luck or bad drive performance.
I scan every 6 months (ish)
I sometimes rescan, but only if the original was bad or I did something that could have affected the scan while it was running.
I find that scanning a disc right after it's burned sometimes gives higher errors than scanning about 10 minutes after it is burned. Most of the time if a large PIF spike is there it usually stays no matter how many times you scan.IMO
I can't do those PIF scans only surface scans, just recently I scanned a couple DVD's that I burned mayb a week ago, and found 1-2 damaged blocks of data, but Nero CD-DVD speed reports it as 100% .. hmm.. good ol' TY media.
I have found results will vary but generally not very significantly. But I well remember the HUGE batch of PIF errors I got at the beginning of one scan that went away on further scans. UGLY. :Z I am glad they weren't real.