Date: Thu, 03 Jun 2010 17:04:27 -0400 From: Boris Kochergin <spawk@acm.poly.edu> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-stable <freebsd-stable@freebsd.org>, Ulrich Drolshagen <u.drolshagen@t-online.de> Subject: Re: Support for ICH sata raid controler Message-ID: <4C0818DB.1050101@acm.poly.edu> In-Reply-To: <20100603204025.GA17762@icarus.home.lan> References: <201006032136.46625.u.drolshagen@t-online.de> <20100603204025.GA17762@icarus.home.lan>
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Jeremy Chadwick wrote: > On Thu, Jun 03, 2010 at 09:36:46PM +0200, Ulrich Drolshagen wrote: > >> we are about to aquire a new Primergy TX150. I can not find any information on >> support of the Intel ICHx sata raid controller in the Hardware Notes of 8- >> Stable. Does anybody know? >> > > All revisions of the ICHxx series are supported (ICH3 to ICH10 I can > confirm). > > If you plan on using the RAID functionality of the chipset (otherwise > known as "MatrixRAID" or "Matrix Storage Technology"), don't bother[1]. > > Instead, enable AHCI on the controller (usually in the system BIOS) and > use one of FreeBSD (software/OS-level) RAID/RAID-like implementations > such as gmirror, gvinum, or ZFS. > > I'd also recommend using ahci.ko instead of ataahci.ko for AHCI support. > achi.ko provides a AHCI/SATA-to-CAM translation layer (which means you > gain benefits like NCQ; disks show up as adaX), while ataahci.ko (the > default) does not use CAM (and does not support NCQ; disks show up as > adX). > > You can use ahci.ko by placing 'ahci_load="yes"' in /boot/loader.conf, > or when booting a FreeBSD installation medium, dropping to the loader > prompt and typing "load ahci" then "boot". > > [1]: http://en.wikipedia.org/wiki/Intel_Matrix_RAID > While it probably won't be done in time to be immediately useful to the original poster, I am working on a GEOM-based ataraid replacement that will behave better. -Boris
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