Re: Intermittent SATA failures ("link offline, clearing class 1 to NONE")

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On 12/03/2009 02:45 AM, Alex Vandiver wrote:
> At Tue Dec 01 20:43:42 -0500 2009, Tejun Heo wrote:
>> Can you please try this one?
> 
> Good and bad dmesg output attached.

That's interesting.  The link state seems to oscillates for quite long
time.  Can you please try the followings?

1. Change sata_deb_timing_hotplug to sata_deb_timing_long in
   ata_piix.c::piidx_sidpr_hardreset() and see whether it solves the
   problem?

2. Switch the controller into ahci mode in BIOS if possible and see
   whether the problem goes away.

3. Try kernel parameter "libata.force=nohrst" and see whether it makes
   any difference.

Thanks.

-- 
tejun
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