From owner-freebsd-current@FreeBSD.ORG Wed Dec 16 02:27:51 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E64E41065679; Wed, 16 Dec 2009 02:27:51 +0000 (UTC) (envelope-from doconnor@gsoft.com.au) Received: from cain.gsoft.com.au (cain.gsoft.com.au [203.31.81.10]) by mx1.freebsd.org (Postfix) with ESMTP id 4B2BF8FC13; Wed, 16 Dec 2009 02:27:50 +0000 (UTC) Received: from inchoate.gsoft.com.au ([203.31.81.30]) (authenticated bits=0) by cain.gsoft.com.au (8.13.8/8.13.8) with ESMTP id nBG2RSL4009201 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Wed, 16 Dec 2009 12:57:28 +1030 (CST) (envelope-from doconnor@gsoft.com.au) From: "Daniel O'Connor" To: freebsd-current@freebsd.org Date: Wed, 16 Dec 2009 12:57:24 +1030 User-Agent: KMail/1.9.10 References: <4B277DFF.2050704@incunabulum.net> In-Reply-To: <4B277DFF.2050704@incunabulum.net> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart7834404.hAK4hRMSN6"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200912161257.26844.doconnor@gsoft.com.au> X-Spam-Score: -3.977 () ALL_TRUSTED,BAYES_00 X-Scanned-By: MIMEDefang 2.63 on 203.31.81.10 Cc: Bruce Simpson , "b. f." , dougb@freebsd.org Subject: Re: AHCI/ATA_CAM for dummies? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Dec 2009 02:27:52 -0000 --nextPart7834404.hAK4hRMSN6 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Tue, 15 Dec 2009, Bruce Simpson wrote: > b. f. wrote: > > "The main regression of the new mode is a lack of ataraid > > alternative, to support cheap BIOS-based ATA RAIDs. If somebody has > > time and wish to port that code from inside ata(4) into GEOM > > module, to make it work over CAM also, I would appreciate that and > > propose a help, if needed." > > Please search stable@ archives for my bad experiences with ataraid. > > IMHO, this stuff needs serious attention before it could be > considered useful, so the lack of ataraid in the new world order is > not that much of a loss, to my mind anyway. It worked well in 4.x in my experience, but I had issues with 6.x and=20 switched to "real" (3ware) RAID cards after that. That said even in 4.x you could get spontaneous splits which was quite=20 annoying. 6.x would do things like pick the "wrong" side of the mirror (ie one=20 that is out of date) which causes hilarity to ensue when you find data=20 for the last week has gone away.. =2D-=20 Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C --nextPart7834404.hAK4hRMSN6 Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (FreeBSD) iD4DBQBLKEWO5ZPcIHs/zowRAouMAJYhbsUvsOK7Lgrdug60gk0eD0hIAJ9URroN RxUkFx+s5PLu2qbu6xriUQ== =M0nN -----END PGP SIGNATURE----- --nextPart7834404.hAK4hRMSN6--