Mark Knecht wrote: > On Tue, Jun 2, 2009 at 7:42 PM, Paul Hartman > <paul.hartman+gen...@gmail.com> wrote: > >> On Tue, Jun 2, 2009 at 8:03 PM, Mark Knecht <markkne...@gmail.com> wrote: >> >>> Hi, >>> I've got a bit of a problem recently with (I think) k3b. Over the >>> last couple of months *some* copies of CDs made in k3b using the Clone >>> Copy feature do not reliably play in my car's CD player. I've tried >>> multiple CD spindles and I've tried burning the copies on two >>> different Gentoo machines - one 32-bit and the other 64-bit - with the >>> same results. The thing that is VERY strange about this problem is >>> that some CDs and all copies of those CDs play fine. For other CDs the >>> originals play fine but every copy I make fails, and if they fail, >>> they fail using either Gentoo machine to copy them. (Hope that's >>> clear....) >>> >>> I'm wondering if there is a program that can verify the contents of >>> each CD against each other, bit for bit, to identify whether this is a >>> problem on all of my computers or whether it's something about my >>> car's CD. The strange thing is that the original CDs play fine in the >>> car. It's only the copies that sometimes don't, and it's only the >>> copies of *some* CDs, not all CDs. >>> >>> I've been using these same machine and same car CD player for years >>> and everything has always been fine. Now for the last 2-3 months >>> nearly 50% of what I copy fails. >>> >> I don't think there's a way to do bit-for-bit compare of audio CDs... >> if it's a burning issue I would try burning at a slower speed (as slow >> as you can tolerate waiting for). >> >> Maybe your car's CD player/laser is dying. Perhaps try taking some old >> CDs that you know used to work and see if they still play okay. The CD >> player in my car for the past month or so has decided to be unable to >> play a CD without skipping like crazy. It is maddening. >> >> >> > Reading around on the web I got pretty much the same picture - that > it's not possible to verify 100% bit-for-bit that an audio CD is > identical. Still, I would think that if I made whatever the 'iso' is > of a single CD twice and compared the two of those I'd expect them to > be the same, but maybe we cannot really guarantee the burning > operation is exactly bit-for-bit. I don't know. > > It likely is the car's CD player but it's been hard to prove so far. > It plays all originals fine. It plays most copies fine. However it > fails on all copies of certain CD lately no matter what Gentoo machine > I burn them on. Strangeness. > > Thanks for answering back! > > - Mark > > >
Could it be some copy protection thing that is new maybe? Something k3b can't quite copy. Dale :-) :-)
