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

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Date:	Mon, 13 Oct 2008 09:03:54 +0200
From:	Mikael Pettersson <mikpe@...uu.se>
To:	Tejun Heo <htejun@...il.com>
Cc:	Mikael Pettersson <mikpe@...uu.se>,
	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)

Tejun Heo writes:
 > Mikael Pettersson wrote:
 > > - smartctl -n standby waking Linda's disks from standby is probably
 > >   a disk firmware issue or a smartctl issue. I see no evidence that
 > >   sata_promise is to blame for that.
 > 
 > /me agrees.  I think it's most likely a problem in the firmware.
 > 
 > > - 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. 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.
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