Mark Lanctot;195689 Wrote: > Can it? From what I have seen of damaged CDs, EAC's estimate of where > the "suspect positions" are varies from rip to rip. It's close, but > not identical. > > When you think about a scratch, it's very possible that the same drive > won't be affected the same way by it twice just due to how small a > pit/land is versus the optical aberration a scratch creates. > > The error would have to be identical down to the last single bit. What > are the odds of that, even given that the "damage level" hasn't > changed? > > I'm not trying to contradict you, I'm really just asking the question. > I could be wrong here.
There could be a few ways that this could happen. One of them is if the drive is not really re-reading a bad block but keeps returning the same bad cached result. I think that there has been some discussion of this and ways of trying to make sure that your drive isn't caching but it seems that it's difficult to tell. Also, I'll give you a real life example that happened to me - not with music but with a Windows service pack. I kept trying to install a service pack from CD and it kept failing. So I copied it to the hard drive and and it still failed. I copied it again to the hard drive to another location and it failed. I did a compare and the two copies were the same but they wouldn't run. This was a years ago in the days where downloading the service pack again would take hours. Anyway, the service pack had worked on other machines from the CD so I swapped out the drive in the machine and then the service pack worked. I'm not sure what was wrong with the original drive but whatever bad data it was spewing it was doing it consistantly. Anyway, this may not be the best example because it was data that I was working with. My guess is that whatever was wrong with the drive would have made music ripped from it be unlistenable but I am just throwing out some examples. I was aminly saying that you are pretty much guaranteed to have a good rip if AccurateRip says it's good. With that being said a lot of my discs come from YourMusic.com and they don't match the AccurateRip database anyway. But since most of my standard pressing have been verified by AccurateRip I feel fairly sure that I am getting good rips. I do agree with you that if data is being compromised by a scratch in the disc and that the drive is actually re-reading that data it would likely vary. -- fred7 ------------------------------------------------------------------------ fred7's Profile: http://forums.slimdevices.com/member.php?userid=6523 View this thread: http://forums.slimdevices.com/showthread.php?t=34232 _______________________________________________ ripping mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/ripping
