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    SubjectRe: Conflict between ide and usb?
    On Fri, 16 Mar 2007 16:34:15 -0400
    lsorense@csclub.uwaterloo.ca (Lennart Sorensen) wrote:

    > Do you even have DMA enabled for the DVD drive? Without it it will be
    > very slow and painful for the CPU. I also have noticed that many fast
    > (16x) DVD writers must have an 80 wire cable or they won't work
    > correctly and do nasty things to the system.
    >
    > Check /proc/ide/hdX/settings|grep dma and see if it says 1 0 1 or 0 0 1.

    I _knew_ I enabled the DMA, but it seems that is switches off when I start
    the transfer:

    hdc: DMA disabled
    hdc: ide_intr: huh? expected NULL handler on exit
    hdc: ATAPI reset complete
    ISO 9660 Extensions: RRIP_1991A
    VFS: busy inodes on changed media.

    This is on hdc, which is the DVD. Harddisk has DMA on.

    John
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