linux-kernel - Re: [PATCH] Ghost EDD devices in /sys again

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Message-Id: <200809281035.06547.arvidjaar@newmail.ru>
Date:	Sun, 28 Sep 2008 10:34:58 +0400
From:	Andrey Borzenkov <arvidjaar@...mail.ru>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] Ghost EDD devices in /sys again

On Sunday 07 September 2008, H. Peter Anvin wrote:
> 
> I think this is closer to what we really want; after all, memory being written is the "first principles" test that applies here.
> 

OK I have been using this for some time. I do not actually insist on
returning "failure" for zero signature; my main concern was duplicated
signature resulted from not clearing read buffer. Still I assume that
zero signature is the same as no signature; i.e. even if disk is physically
present but zeroed out there is no point in presenting mbr_signature in
sysfs either.

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