Bug #1947

GA-880GM-UD2H (rev. 1.3) AHCI fails to detect disks at the end of the RAID controller

Added by eocallaghan almost 4 years ago. Updated over 3 years ago.

Status:NewStart date:
Priority:LowDue date:
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Description

dmesg.verbose.RAID (36.5 KB) eocallaghan, 12/31/2010 02:46 PM

History

#2 Updated by dillon almost 4 years ago

:New submission from Edward O'Callaghan <>:
:
:Attached is the verbose boot of the machine when two 1TB disks are in a RAI=
:D 1
:behind the controller. If the AMD RAID controller is set to AHCI mode the d=
:isks
:show fine.

Mmm. I'm not aware of any hardware AMD RAID controller. Are you
sure this isn't some sort of BIOS soft-raid feature? If the BIOS
is taking over the AHCI controller the OS won't have any visibility
into it.

-Matt

#3 Updated by eocallaghan over 3 years ago

Hi Matt,

Well I am not sure, hence providing all the resource materiel for someone more
well versed in the AHCI spec. I should not that the hardware does not belong to
me and that this is a smb server I setup for a friend. I do however, have SSH
into this machine.

Your thoughts?
Cheers,
Edward.

#4 Updated by ftigeot over 3 years ago

On Fri, Dec 31, 2010 at 10:57:10PM +0000, Edward O'Callaghan (via DragonFly issue tracker) wrote:
>
> Edward O'Callaghan <> added the comment:
>
> Well I am not sure, hence providing all the resource materiel for someone more
> well versed in the AHCI spec. I should not that the hardware does not belong to
> me and that this is a smb server I setup for a friend. I do however, have SSH
> into this machine.

The GA-880GM-UD2H is a desktop board; it has no integrated RAID controller.

The advertised RAID feature is a BIOS hack which allows some versions of
Microsoft Windows to use software RAID volumes without too much pain.

AFAIK, FreeBSD had some support to understand the on-disk format of some of
these pseudo-raid volumes :
http://www.unix.com/man-page/FreeBSD/4/ataraid/

#5 Updated by eocallaghan over 3 years ago

Ah ok,

That explains that then! I'll just get HAMMER to mirror the disks, like:
http://www.dragonflybsd.org/docs/how_to_implement_hammer_pseudo_file_system__40___pfs___41___slave_mirroring_from_pfs_master/

It would be nice if HAMMER had a single command line option like ZFS such that
it can mirror disks (RAID1) much like how HAMMER can easily strip across disks
(RAID0). That would be really handy! Would it be hard to implement currently and
if not too hard should I then open a RFE for it?

I'll leave this ticket open as a RFE to bring in ataraid from FreeBSD.

Priority: bug->wish.

Cheers,
Edward.

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