atacontrol missing drive after upgrade to 6.3

[Erik Trulsson]

On Wed, Nov 19, 2008 at 11:32:42AM -0800, Jeremy Chadwick wrote:
> On Wed, Nov 19, 2008 at 11:29:19AM -0800, Mark Sams wrote:
> > > From: Jeremy Chadwick <koitsu at 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.

No, it is not.  MatrixRAID was not introduced until with the ICH6R
controller.  Earlier Intel ICH chips (including the ICH5) may well have
supported some kind of BIOS-level RAID, but it was not MatrixRAID.

(This is not to say that their earlier RAID implementations was any more
or less reliable - I have no data on that.)


> 
> 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.



-- 
<Insert your favourite quote here.>
Erik Trulsson
ertr1013 at student.uu.se