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    SubjectRe: Unknown SATA PIIX PCI device ID 0x29b6
    On Sun, 9 Mar 2008, Tejun Heo wrote:

    > Guennadi Liakhovetski wrote:
    > > On Fri, 7 Mar 2008, Tejun Heo wrote:
    > >
    > >>> Looks like almost a minute to me? On another occurence I see about 1.5
    > >>> minutes, then "port is slow to respond, please be patient (Status 0x80)"
    > >>> has been repeated 3 times. On cold-plug also 3 times, I think, about the
    > >>> same time then (time is not updated in the log).
    > >> I see. Does the attached patch make any difference?
    > >
    > > diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
    > > index 4fbcce7..abebdcc 100644
    > > --- a/drivers/ata/libata-core.c
    > > +++ b/drivers/ata/libata-core.c
    > > @@ -6712,6 +6712,7 @@ int sata_link_init_spd(struct ata_link *link)
    > > spd = (scontrol >> 4) & 0xf;
    > > if (spd)
    > > link->hw_sata_spd_limit &= (1 << spd) - 1;
    > > + link->hw_sata_spd_limit = 1;
    > >
    > > ata_force_spd_limit(link);
    > >
    > > Hm, this would force 1.5Gbps on all ports and devices, right? Cannot I
    > > just boot with "libata.force=4:1.5Gbps"?
    >
    > Yeap, you can do that. Wasn't sure you were using .25-rc or .24.

    Yctually it was 2.6.24 before, rebuilt 2.6.25-rc4, booted as above, it did
    say:

    ata4: FORCE: PHY spd limit set to 1.5Gbps

    but hot-plugging the drive still took 50 seconds to recover.

    Thanks
    Guennadi
    ---
    Guennadi Liakhovetski


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