Date: Fri, 16 Jun 2006 10:02:36 -0700 From: Garrett Cooper <youshi10@u.washington.edu> To: freebsd-questions@freebsd.org Subject: Re: ripping "enhanced" audio CDs Message-ID: <4492E42C.5090101@u.washington.edu> In-Reply-To: <20060616102239.U72162@bas.flux.utah.edu> References: <20060614123348.C50539@bas.flux.utah.edu> <4490E85C.9000507@webanoide.org> <20060615161636.Q50539@bas.flux.utah.edu> <20060616102239.U72162@bas.flux.utah.edu>
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Mac Newbold wrote: > Yesterday at 4:23pm, Mac Newbold said: > >> Today at 2:55pm, Mikhail Goriachev said: >> >>>> Jun 14 11:27:21 mybox kernel: acd0: FAILURE - READ_CD HARDWARE ERROR >>>> asc=0x08 ascq=0x01 error=0 >>>> Jun 14 11:27:21 mybox kernel: acd0: FAILURE - READ_CD ILLEGAL REQUEST >>>> asc=0x64 ascq=0x00 error=0 >>>> Jun 14 11:27:22 mybox last message repeated 11 times >>> >> >> I am pretty sure this isn't an anti-piracy feature. It happens to me >> with _any_ "enhanced CD" (audio+data mixed CD), and _only_ on >> enhanced CDs. Never has it happened to me on any non-enhanced audio >> CD. My problem is not with the inability to get the data off, that >> doesn't seem to be a real issue. The problem is with the crashing of >> the computer. >> >> Why should _any_ data read from a removable disk of any kind be >> causing FreeBSD to crash by the mere act of attempting to read it >> from the disk? The device is reporting a failure, but why isn't the >> OS handling that failure gracefully? >> >> If I'm asking the wrong list, and should be asking >> hackers@freebsd.org or some list related to multimedia, please let me >> know. > > > Thanks to everyone who has contributed answers to this thread. (BTW, > it is helpful if you keep me cc'd in your replies, since I'm not on > the list itself and only see responses when I go check the archive.) > > To answer some of the questions that came up: > > 1. It never happens on any plain/normal/non-enhanced audio CD I've > tried, which I'm quite sure might include some that are "copy > protected" or have some kind of DRM in place. > > 2. None of them have said anything about being non-functional or > limited with certain computer players or operating systems that I have > noticed. > > If we can, I'd like to take this discussion in a slightly different > direction. Let's change our thinking by making the following assumptions: > > A. It is not a DRM or copy protection scheme causing the errors. > > B. Since it happens on every "enhanced" CD (i.e. one containing audio > tracks and a data track meant to be read on a computer) that I've been > able to try, but not on any non-enhanced CDs, of which I've tested > many hundreds, let's assume it is related to the fact that it is > enhanced. > > By combining assumption A and assumption B, I'm led to the conclusion > that there is something about Enhanced CDs that is causing FreeBSD to > get unrecoverable errors that lead inevitably to a system crash. > Namely, it generates "READ_CD Hardware Error" messages, followed by a > series of "READ_CD Illegal Request" messages immediately prior to the > crash. > > Does anyone have some ideas (other than copy protection or DRM) on why > this might be happening or what might be done to solve the problem? > > Does anyone have some ideas of other places or lists where I might ask > a similar question and be more likely to get closer to solving the > problem? > > Thanks again, > Mac Ok then... what is the CD drive and model? -Garrett
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