Date: Wed, 19 Nov 2008 11:55:40 -0800 From: Jeremy Chadwick <koitsu@FreeBSD.org> To: Erik Trulsson <ertr1013@student.uu.se> Cc: Mark Sams <msams992000@yahoo.com.au>, freebsd-stable@freebsd.org Subject: Re: atacontrol missing drive after upgrade to 6.3 Message-ID: <20081119195540.GA6217@icarus.home.lan> In-Reply-To: <20081119194851.GA20898@owl.midgard.homeip.net> References: <610465.33671.qm@web36108.mail.mud.yahoo.com> <20081119191042.GA5284@icarus.home.lan> <957588.98964.qm@web36103.mail.mud.yahoo.com> <20081119193242.GA5739@icarus.home.lan> <20081119194851.GA20898@owl.midgard.homeip.net>
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On Wed, Nov 19, 2008 at 08:48:51PM +0100, Erik Trulsson wrote: > 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@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.) This is news to me. I'll spend some time tonight at Intel's site reading old chipset specifications. :-) The ataraid(4) man page only mentions MatrixRAID with regards to Intel, which is why I'm wondering what exactly the ICH5 offers. I wonder if it's a very primitive RAID type which ataraid(4) simply handles under the MatrixRAID code (which would explain the problems he's having with getting the array back in order). Thanks for the education lesson! Always appreciated. :-) -- | 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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