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    SubjectRe: DVD/CD Read Problem: cdrom_decode_status: status=0x51 {DriveReady SeekComplete Error}
    On Sun, Jul 13, 2003 at 07:51:07PM +0400, Andrey Borzenkov wrote:
    > this is ide-cd problem. drivers/ide/ide-cd:cdrom_decode_status():
    > [ ... ]
    > } else if ((err & ~ABRT_ERR) != 0) {
    > [ ... ]
    > } else if (sense_key == MEDIUM_ERROR) {
    > [ ... ]
    > they are not user-space issues. Try to swap two conditions above and see what
    > happens. I cannot test it anymore for reason below ...

    Swapping these conditions improved the situation quite a lot.
    Subjectively, I would say it's 90% better. By extending the read-ahead
    cache to 32M, I can play the DVD almost perfectly with those conditions
    (ABRT_ERR and MEDIUM_ERROR) swapped.

    Also, for the first time, I get messages of this sort in syslog:

    Jul 13 22:22:47 joehill kernel: end_request: I/O error, dev hdc, sector 7865320
    Jul 13 22:22:47 joehill kernel: Buffer I/O error on device hdc, logical block 983165

    Before, the only sorts of errors I ever got were:

    Jul 13 00:14:35 joehill kernel: hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
    Jul 13 00:14:35 joehill kernel: hdc: cdrom_decode_status: error=0x30LastFailedSense 0x03
    Jul 13 00:14:35 joehill kernel: hdc: ide_intr: huh? expected NULL handler on exit

    Is there a reason these conditions should *not* be swapped? Is there
    something I can test? Otherwise, my problem is basically fixed by this
    change.

    --Adam Kessel
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