linux-kernel - Re: Unknown SATA PIIX PCI device ID 0x29b6

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Date:	Tue, 11 Mar 2008 20:37:50 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Guennadi Liakhovetski <g.liakhovetski@....de>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org,
	Jeff Garzik <jeff@...zik.org>, linux-ide@...r.kernel.org
Subject: Re: Unknown SATA PIIX PCI device ID 0x29b6

Hello,

Guennadi Liakhovetski wrote:
>> Guennadi Liakhovetski wrote:
>>> Well, I am not sure, whether it helps, tried booting with both 1.5Gbps and 
>>> this patch, it recovers now within 30 sec in both cold- and hot-plug 
>>> cases. To really state, that it has improved from about 55 sec down to 30 
>>> sec one would need more testing. Is this the kind of improvement you 
>>> expected?
>> Not really.  :-P
>>
>>> Can it be, that with this hardware it just cannot get better? 
>>> Remember, the disk is an external eSATA enclosure with a (relatively new) 
>>> PATA disk inside.
>> Can you try out a shorter cable?  I had a lot of troubles with eSATA +
>> long cable + PMP combinations.  Using shorter cable usually solves the
>> problem for me.
> 
> Well, this cable is only about 50cm long, or even shorter, and using a 
> shorter one would be difficult there, even if I manage to get hold of one. 
> But, in principle, if this is not a generic ahci problem that needs to be 
> solved, I personally can somehow live with it. Having to wait 1 minute is 
> not very nice, but so far not critical.

50cm gotta be short enough.  For intel ahci, it definitely isn't a
general problem but it would still be nice if we can find out what's
going on but I don't have much idea what to do next.  I'll keep your
problem in mind and see whether any pattern emerges.  If you find out
something new, please let us know.

Thanks.

-- 
tejun
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