Re: PMP SMART error recovery and failure code decoding help

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Hello,

On Sun, Jan 16, 2011 at 08:39:50AM -0800, Marc MERLIN wrote:
> Anyway, the problem happens with both drives that I manually spin down and
> drives that spin down on their own. I think it's not actually a 'real',
> error but more an issue where drives cannot answer some SMART error when
> they are spun down.

It could be that the drives need to spin up to answer the smart
command and the timeout on the smart commands is a bit too short for
that to happen.  Forcing a disk access before issuing the smart
command could work around the problem.

> That said, is it normal/expected for the PMP code to do a full bus reset
> because of a SMART command that couldn't go through?

Yeah, after a timeout, the driver doesn't know what state the
controller / PMP / devices are in, so it's kind of forced to do full
reset.

Thanks.

-- 
tejun
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