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

[Alex Vandiver <alex@chmrr.net>]

At Sun Dec 20 23:50:15 -0500 2009, Tejun Heo wrote:
> Wow, that's unexpected.  Can you please post log of this with the
> debugging patch applied?

I've only been able to replicate this once, and I didn't manage to
save its dmesg, sadly.  I'll see if I can get it to crop up again,
though.

> Hmmm... interesting.  So, the boot time probing is somehow different
> from probing initiated by manual scan (they both use hardreset).  Can
> you please post log of manual scans with debug patch applied?

The output of a manual scan is:

[  255.236938] ata1.00: hard resetting link
[  255.465422] ata1.00: XXX debounce start, SStatus=123
[  257.551239] ata1.00: XXX debounce done, SStatus=123, DET stable for 2090 msecs
[  257.551246] ata1.01: hard resetting link
[  257.780776] ata1.01: XXX debounce start, SStatus=123
[  259.866589] ata1.01: XXX debounce done, SStatus=123, DET stable for 2090 msecs
[  260.026328] ata1.00: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[  260.026342] ata1.01: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[  260.087511] ata1.00: configured for UDMA/133
[  260.127736] ata1.01: configured for UDMA/133
[  260.127740] ata1: EH complete

 - Alex
-- 
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