linux-kernel - Re: [smartmontools-support] inactive SATA drives won't stay in standby or sleep, PATA models did. (fwd)

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Message-ID: <48F2F3E4.4030800@gmail.com>
Date:	Mon, 13 Oct 2008 16:08:20 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Mikael Pettersson <mikpe@...uu.se>
CC:	Christian Mueller <Christian.Mueller@....com>,
	Bruce Allen <ballen@...vity.phys.uwm.edu>,
	Smartmontools Mailing List 
	<smartmontools-support@...ts.sourceforge.net>,
	LKML <linux-kernel@...r.kernel.org>,
	IDE/ATA development list <linux-ide@...r.kernel.org>
Subject: Re: [smartmontools-support] inactive SATA drives won't stay in standby
 or sleep, PATA models did. (fwd)

Mikael Pettersson wrote:
> Tejun Heo writes:
>  > > - hardreset in sata_promise seems broken. I'll take a closer look
>  > >   at that in about a week's time (I'll be busy with other work the
>  > >   next couple of days).
>  > 
>  > This looks like a rather serious problem, so please take a look at
>  > this.  Also, after the drive went down, does unplugging and replugging
>  > the signal cable fix the problem, if not does doing the same thing
>  > with the power cable make any difference?
> 
> I couldn't bring the port back up with any combination of signal/power
> cable hotplugging.

Heh.. that rules out drive firmware stuck in wonderland.

> Even rmmod sata_promise; modprobe sata_promise failed to bring the
> port back up. Hence my suspicion that hardreset is borked or doesn't
> kick in.

It looks like the controller requires harder or more proper kick in
the ass to return to sane state.  :-)

-- 
tejun
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