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Date: Sat, 14 Sep 2002 14:41:52 -0700 (PDT)
From: Alex Davis <alex14641@yahoo.com>
Subject: Re: Possible bug and question about ide_notify_reboot in 2.4.19
To: Andre Hedrick <andre@linux-ide.org>
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <Pine.LNX.4.10.10209141342090.6925-100000@master.linux-ide.org>
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--- Andre Hedrick <andre@linux-ide.org> wrote:
> 
> Hi Alex,
> 
> We (T13 Standards) only recently required (shall) all non-packet device to
> support flush cache.  No where does it state that a device supporting PM
> for a standby (shall), the key word here is "shall", issue a flush-cache.
I am assuming that a hard drive is a non-packet device. Let me make sure I'm
interpreting this correctly: older ( and some current ) drives may flush cache
on standby/sleep; current and future drives may not. In addition, older drives
may not support the flush cache command.

> I will not break support for older hardware, on a whim.
Not my intention.

> You said you can make a patch, please do so and apply it to your tree.
> Now, if you want the option, submit the patch for review.  For two or
> three days there has been no patch to test.
Still testing locally. I also want to fix the code so that the flush is
done before the standby.

> 
> To be absolutely honest, I really do not like to give options in the
> kernel-config build which can cause backwards compatablity problems.
This wouldn't be a config option. You would have to modify ide.c by
hand to disable standby.
> 
> Andre Hedrick
> LAD Storage Consulting Group
> 


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