Skip site navigation (1)Skip section navigation (2)
Date:      Mon, 12 Feb 2007 19:37:48 +1100
From:      Peter Jeremy <peterjeremy@optushome.com.au>
To:        "Daniel O'Connor" <doconnor@gsoft.com.au>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: What is a good choice of sata-ii raid controller for freebsd?
Message-ID:  <20070212083748.GA837@turion.vk2pj.dyndns.org>
In-Reply-To: <200702121607.05427.doconnor@gsoft.com.au>
References:  <00ad01c74b65$79db1710$0c00a8c0@Artem> <200702120940.42167.doconnor@gsoft.com.au> <20070211235138.GA53649@hugo10.ka.punkt.de> <200702121607.05427.doconnor@gsoft.com.au>

next in thread | previous in thread | raw e-mail | index | archive | help

--dDRMvlgZJXvWKvBx
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On 2007-Feb-12 16:07:03 +1030, Daniel O'Connor <doconnor@gsoft.com.au> wrot=
e:
>I regularly ship systems overseas where the power fails frequently. The=20
>inability to boot because one disk got hosed is Bad News (tm).

A decent UPS can help here.

>It depends on your exact situation, I was just pointing out that SW RAID=
=20
>doesn't cover all the bases HW RAID does.

If the disk is dead then the BIOS will skip it and the system should
boot normally (I've tested this by pulling a disk since I didn't have
a suitable dead disk to hand).  A hard error in the 2nd stage boot
loader, ficl or the kernel is definitely the worst case - I agree that
this is very difficult for software raid to recover from.

Note that even with hardware raid, there are still lots of failure
points.  The least reliable parts of a current computer are the CPU
and PSU fans, not the disks.

--=20
Peter Jeremy

--dDRMvlgZJXvWKvBx
Content-Type: application/pgp-signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (FreeBSD)

iD8DBQFF0Cdc/opHv/APuIcRAtsoAJ9JCaMOgd5DYUPsMQeG6Cak66AU/ACfROPM
dDL/LSmXPR1Q/uFm2cuhJBE=
=0qTu
-----END PGP SIGNATURE-----

--dDRMvlgZJXvWKvBx--



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20070212083748.GA837>