Date: Thu, 26 Jul 2007 23:14:06 +0930 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: freebsd-stable@freebsd.org, scottl@samsco.org, hg@queue.to Subject: Re: [resolved, ?naively] Re: geom vs ich through ar device - benchmarks? Message-ID: <200707262314.07102.doconnor@gsoft.com.au> In-Reply-To: <200707261034.l6QAYm7u001453@lurza.secnetix.de> References: <200707261034.l6QAYm7u001453@lurza.secnetix.de>
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--nextPart4859892.hHSMqPFyRE Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Thu, 26 Jul 2007, Oliver Fromme wrote: > As an additional note: _If_ the ICH RAID was in hardware > (which it isn't, as Scott pointed out), it might be > preferable to use it instead of gmirror, even if it's 5% > slower, but because it would save a lot of cpu. > > Of course, since both are in software and probably consume > similar amounts of cpu, it's better to use gmirror because > it's a little faster. gmirror will not protect you against a specific failure mode. ie if you are booting off the array and the primary disk fails with a=20 read error on the boot section (before the kernel is booted and you=20 have redundancy) then you will not be able to boot your system. It is pretty easy to fix this if you are present but it can be a real=20 PITA if you are far 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 --nextPart4859892.hHSMqPFyRE Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQBGqKUn5ZPcIHs/zowRAjNPAJ9r83Gy4INHway87C/4TpXIt5vckACfdVFN mumsZZ3RBFKJn8WGG22cYrI= =c2h+ -----END PGP SIGNATURE----- --nextPart4859892.hHSMqPFyRE--
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