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    Subject2.2.x messages when reading a raw CDROM device
    Hi all

    I have noticed that when doing
    cat /dev/cdrom > /dev/null
    on a Linux 2.2.x kernel (x=1,6), the following messages appear on the
    console right at the end of the CD:
    ATAPI device hdc:
    Error: Illegal request -- (Sense key=0x05)
    Logical block address out of range -- (asc=0x21, ascq=0x00)
    hdc: command error: status=0x51 { DriveReady SeekComplete Error }
    hdc: command error: error=0x50
    end_request: I/O error, dev 16:00 (hdc), sector 300708
    ATAPI device hdc:
    Error: Illegal request -- (Sense key=0x05)
    Illegal mode for this track or incompatible medium -- (asc=0x64,ascq=0x00
    cat: /dev/cdrom: I/O error

    Similar messages occur when using a SCSI CDROM and don't seem to be
    dependant on whether it is a CDR or a pressed CD being read.

    This didn't seem to occur with 2.0.36 (or 2.0.30 for that matter). Is this
    a bug or is it just a deliberate design decision (if so, why was it done)?
    How can one cleanly read a CDROM image under 2.2.x (or can/should the above
    errors just be ignored)?


    PS: please CC any replies to me as the kernel list archive i'm currently
    accessing may be missing some articles for some reason. Thanks.
    Jonathan Woithe

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