From owner-freebsd-geom@FreeBSD.ORG  Sun May  6 02:46:49 2007
Return-Path: <owner-freebsd-geom@FreeBSD.ORG>
X-Original-To: freebsd-geom@freebsd.org
Delivered-To: freebsd-geom@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 6AF2A16A403
	for <freebsd-geom@freebsd.org>; Sun,  6 May 2007 02:46:49 +0000 (UTC)
	(envelope-from ivoras@fer.hr)
Received: from palunko.srce.hr (palunko.srce.hr [161.53.2.67])
	by mx1.freebsd.org (Postfix) with ESMTP id ED53713C45B
	for <freebsd-geom@freebsd.org>; Sun,  6 May 2007 02:46:48 +0000 (UTC)
	(envelope-from ivoras@fer.hr)
Received: from [193.198.134.42] (cmung1566.cmu.carnet.hr [193.198.134.42])
	by palunko.srce.hr (8.13.8/8.13.8) with ESMTP id l4614aXf017432;
	Sun, 6 May 2007 03:04:37 +0200 (CEST)
Message-ID: <463D2997.2050207@fer.hr>
Date: Sun, 06 May 2007 03:04:23 +0200
From: Ivan Voras <ivoras@fer.hr>
User-Agent: Thunderbird 1.5.0.10 (Windows/20070221)
MIME-Version: 1.0
To: =?UTF-8?B?RGFnLUVybGluZyBTbcO4cmdyYXY=?= <des@des.no>
References: <171980743.20070504223126@uzvik.kiev.ua>	<125507.38194.qm@web30304.mail.mud.yahoo.com>	<f1i3s4$j4n$1@sea.gmane.org>
	<86fy6bqocr.fsf@dwp.des.no>
In-Reply-To: <86fy6bqocr.fsf@dwp.des.no>
X-Enigmail-Version: 0.94.1.0
Content-Type: multipart/signed; micalg=pgp-sha1;
	protocol="application/pgp-signature";
	boundary="------------enigB051F796716AD8B02D55F406"
X-Scanned-By: MIMEDefang 2.55 on 161.53.2.67
Cc: freebsd-geom@freebsd.org
Subject: Re: graid5 after-reboot problem
X-BeenThere: freebsd-geom@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: GEOM-specific discussions and implementations
	<freebsd-geom.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-geom>,
	<mailto:freebsd-geom-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-geom>
List-Post: <mailto:freebsd-geom@freebsd.org>
List-Help: <mailto:freebsd-geom-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-geom>,
	<mailto:freebsd-geom-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 06 May 2007 02:46:49 -0000

This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
--------------enigB051F796716AD8B02D55F406
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

Dag-Erling Sm=C3=B8rgrav wrote:
> Ivan Voras <ivoras@fer.hr> writes:
>> Is the write cache in graid5 aware of what happens on the VFS / UFS
>> layers (something like gjournal does)? Otherwise, how can you guarante=
e
>> consistency with write caching at the GEOM layer when there's a power
>> outage or some other system interruption?
>=20
> You can't.  Google for "RAID 5 write hole" for an explanation.

It was a rhetorical question :)


--------------enigB051F796716AD8B02D55F406
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.5 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFGPSmXldnAQVacBcgRAgk6AKCfoUPOm1TmzicxoGEE5LsgRCNcVQCgtLyh
7EfkINylR0hIyhjrtsGpIVU=
=ky+m
-----END PGP SIGNATURE-----

--------------enigB051F796716AD8B02D55F406--