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Date:      Wed, 19 Nov 2008 11:32:42 -0800
From:      Jeremy Chadwick <koitsu@FreeBSD.org>
To:        Mark Sams <msams992000@yahoo.com.au>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: atacontrol missing drive after upgrade to 6.3
Message-ID:  <20081119193242.GA5739@icarus.home.lan>
In-Reply-To: <957588.98964.qm@web36103.mail.mud.yahoo.com>
References:  <610465.33671.qm@web36108.mail.mud.yahoo.com> <20081119191042.GA5284@icarus.home.lan> <957588.98964.qm@web36103.mail.mud.yahoo.com>

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On Wed, Nov 19, 2008 at 11:29:19AM -0800, Mark Sams wrote:
> > From: Jeremy Chadwick <koitsu@FreeBSD.org>
> > You're using Intel MatrixRAID, aren't you?  Please migrate away from
> > this immediately, your data is at risk.
> 
> Ummm... I don't think so. It is just a standard RAID 1 mirror using the
> built in ICH5 chip. It has been running fine for a over a year now on
> the other builds of FreeBSD 6.x.  It is not RAID 0+1 or whatever the
> Matrix RAID thing is.

The built-in ICH5 == Intel MatrixRAID.  It's BIOS-level RAID under an
Intel ICH chip.  It's called MatrixRAID.

I have no personal problem with Intel MatrixRAID.  What I'm telling you
is that FreeBSD's support for it is horribly, horribly broken.  You
*will* lose your data.  Read my Wiki entries in full.

I'm only going to say this once more: please reconsider.  You very
likely are not going to be able to recover that failed array.  The last
person who had this problem had to boot a Linux LiveCD and attempt to
use Linux tools to repair it.

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |




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