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    SubjectRe: 2.5.69, IDE TCQ can't be enabled

    On Mon, 12 May 2003, Oleg Drokin wrote:

    > Hello!
    >
    > On Mon, May 12, 2003 at 03:16:17PM +0200, Bartlomiej Zolnierkiewicz wrote:
    > > > > Just a note that we have found TCQ unusable on our IBM drives and we had
    > > > > some reports about TCQ unusable on some WD drives.
    > > > > Unusable means severe FS corruptions starting from mount.
    > > > > So if your FSs will suddenly start to break, start looking for cause with
    > > > > disabling TCQ, please.
    > > > I can confirm that. This drive Model=IBM-DTLA-307045, FwRev=TX6OA60A,
    > > > SerialNo=YMCYMT3Y229 has eaten my filesystem with TCQ on 2.5.69
    > > TCQ is marked EXPERIMENTAL and is known to be broken.
    > > Probably it should be marked DANGEROUS or removed?
    >
    > How do you think people will test code that is removed?

    I wanted to remove config option, just like it is for ide-tape.c
    currently. But yes, its better to mark it DANGEROUS...

    > Or do you mean that nobody plans to look at this ever?
    > I remember that Jens Axboe promised to take a look at it some
    > months ago.

    many months ago :\

    btw, some older disks have broken TCQ implementation...
    --
    Bartlomiej

    > Bye,
    > Oleg

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