Support for ICH sata raid controler

[Ulrich Drolshagen]

Am Donnerstag 03 Juni 2010 schrieb Jeremy Chadwick:
> 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
> 
Indeed much to consider. Thank you Jeremy for your suggestions

Ulrich

-- 
http://www.ulrich-drolshagen.de