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Posted by Voinin on 07/31/06 02:59
On 7/30/2006 2:30 PM, Sune Mølgaard went clickity-clack on the keyboard
and produced this interesting bit of text:
> Hi all.
>
> I read the FAQ section on copy protection, but I didn't seem to find the
> scheme that is responsible for the following:
>
> On my linux box, when I insert a labeled copy-protected DVD, I can mount
> the volume fine. Trying to read any files on it, however, results in I/O
> errors at the kernel level:
>
> Jul 30 19:39:53 jekaterina kernel: [24270.306257] hdc: command error:
> status=0x51 { DriveReady SeekComplete Error }
> Jul 30 19:39:53 jekaterina kernel: [24270.306263] hdc: command error:
> error=0x54 { AbortedCommand LastFailedSense=0x05 }
> Jul 30 19:39:53 jekaterina kernel: [24270.306267] ide: failed opcode
> was: unknown
> Jul 30 19:39:53 jekaterina kernel: [24270.306270] end_request: I/O
> error, dev hdc, sector 1536
>
> I know from the label that the disc is protected, however, it is unclear
> to me, if the scheme is part of the DVD Video specification. The disc is
> clearly marked with the DVD Video logo, so in effect, I am trying to
> ascertain if the disc is mislabeled.
My understanding of it is that copy protection has nothing to do with
it. A license has to be bought to decode video DVDs. Generally
speaking, you pay for such a license when you buy a DVD player or
software that will play a DVD. For example, if you don't install a DVD
player on a Windows box Windows Media Player won't play back a video
DVD. This is because neither Windows nor WMP comes with a license to
play the DVD video. You'll need to purchase software that will play the
DVDs.
--
"The smallest feline is a masterpiece." - Leonardo da Vinci
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