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SubjectRe: SIL_QUIRK_MOD15WRITE workaround problem on 2.6.14
Jeff Garzik wrote:
> Tejun Heo wrote:
>
>> Ethan confirmed that it's 1095:3114. Arghhh.... Maybe we should keep
>> m15w quirk for 3114's for the time being? Better be slow than hang.
>> Whatever bug the m15w quirk was hiding.
>
>
> A generic 'slow_down_io' module option is reasonable.
>
> It is not appropriate to apply mod15write quirk to hardware that isn't
> affected by the chip bug.
>
> A better solution is to write a 311x-specific interrupt handler.
>

Hello, Jeff. Hello, Carlos.

I bought a sii3114 controller yesterday and took out my ST3120026AS for
testing. The drive times out during a WRITE_EXT, and locks up.

* The ST3120026AS works perfectly on a VIA controller.
* The sii3114 controller works perfectly with Maxtor 6B080M0 drives.

I don't know. It acts and smells like m15w problem. What are the odds
of having the same symptom on the same combination?

Also, I've asked one of my friends who has a sii3512 onboard controller
and an affected seagate drive to test. The harddisk works on 2.6.13
with the quirk, but it freezes on 2.6.14. m15w affected seagate drives
does _NOT_ work on 3512 and 3114 on 2.6.14, be it m15w or something else.

--
tejun
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