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    SubjectRe: Reading Windows CD on Linux 2.4.6
    On Mon, Sep 17, 2001 at 04:08:10PM -0700, H. Peter Anvin wrote:
    > Followup to: <3BA6791A.616636CE@MissionCriticalLinux.com>
    > By author: Bruce Blinn <blinn@MissionCriticalLinux.com>
    > In newsgroup: linux.dev.kernel
    > >
    > > I do not think the disk is missing data or that there are any bad
    > > blocks. The reason I say this is because I can access every file on the
    > > disk when the CD is mounted as an iso9660 file system on a 2.2.19
    > > kernel. I compared the files with the originals and they are identical.
    > >
    > > The only reason I found out dd would not copy the disk is because Masoud
    > > asked for an image.
    > > I tried using dd to copy a much larger CD (150 Mb) and it fails at the
    > > same place and the resulting file is the same size (737280 bytes). So
    > > it fails long before the end of the data.
    > >
    > > By the way, dd works fine when copying other CDs that were not created
    > > under Windows.
    > >
    >
    > This almost seems to imply they're recording the data noncontiguously,
    > which would be totally bizarre but not totally impossible.
    >

    I've seen commercial CD do this. Maybe that dd trick to skip empty parts
    and pad with zeros would work...
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