Date: Tue, 13 Aug 2002 09:22:40 +0100
From: jbradford@dial.pipex.com
Message-Id: <200208130822.g7D8Me92000218@darkstar.example.net>
To: linux-kernel@vger.kernel.org
Subject: (More about) IDE powersaving
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1072
Lines: 19

Hi Everyone,

Sorry to bring this up again, but I think that the current behavior of requiring a manual device reset, for some disks that are put to sleep with hdparm -Y is definitely wrong - I mailed Mark Lord, (the hdparm maintainer) who said:

> Yes, I agree:  the IDE driver should automatically
> attempt a "device reset" at some point when trying
> to communicate with a drive that is not responding
> (eg. due to "hdparm -Y" or whatever).

Is this a known issue with some interface/drive combinations?  I can only reproduce it with a Maxtor disk on a PIIX3 interface.  After being put to sleep, the disk never responds until it is manually reset with hdparm -w.

I know you can achieve a similar effect by putting the disk in to standby, but putting it to sleep will reduce energy consumption, (by a tiny amount).

John.
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