Re: HDD not suspending properly / dead on resume

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On Saturday, July 10, 2010, Tejun Heo wrote:
> On 07/10/2010 08:50 AM, Stephan Diestelhorst wrote:
> >> I have a box where this problem is kind of reproducible, but it happens _very_
> >> rarely.  Also I can't reproduce it on demand running suspend-resume in a tight
> >> loop.  Are you able to reproduce it more regurarly?
> > 
> > For me it is much more reproducible. If I run multiple direct writing
> > dd-s to the disk in question I trigger it rather reliably (~75% or
> > higher). See the attached script from an earlier email.
> > Maybe that helps triggering your case more reliabl, too?
> 
> Can you please try the following git tree?
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git libata-irq-expect

Well, for now I got this:

[   36.833075] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[   36.833085] ata1.00: failed command: SMART
[   36.833099] ata1.00: cmd b0/d5:01:06:4f:c2/00:00:00:00:00/00 tag 0 pio 512 in
[   36.833101]          res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[   36.833107] ata1.00: status: { DRDY }
[   36.833118] ata1: hard resetting link
[   37.316053] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[   37.316840] ata1.00: configured for UDMA/133
[   37.316888] ata1: EH complete

during initialization.  Apart from this it seems to work fine.

But in fact I'll only be able to say it helps if it survives a week-or-so
without suspend failure.

Rafael
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