Re: C600 raid

["Jiang, Dave" <dave.jiang@intel.com>]

On Thu, 2013-10-24 at 16:33 +0000, Marcus Sorensen wrote:
> Thanks. In the past with onboard controllers like this I've set up the
> array in the boot menu, and then when installing the OS the kernel has
> automatically spun it up as a device mapper disk. I'm assuming that
> the bios menu tools write the MD metadata such that an installer with
> MD modules would do the same.

I think it entirely depends on the distro. I know for sure that SLES,
RHEL, and Fedora has the proper support for installing to and booting
from IMSM RAID volumes. 

> 
> On Oct 24, 2013 9:57 AM, "Jiang, Dave" <dave.jiang@intel.com> wrote:
>         On Thu, 2013-10-24 at 04:31 +0000, Marcus Sorensen wrote:
>         > Can someone remind me, is the C600 chipset "raid-1" an
>         md-raid with
>         > the intel metadata, or is it dm-raid compatible like other
>         fakeraid
>         > drivers, or something else?
>         
>         The C600 series chipset is a SAS controller. Depending on the
>         SKU of the
>         chipset the OROM/EFI driver will enable or disable RAID5.
>         Otherwise the
>         OROM should at least support RAID0 and RAID1. It uses the
>         external IMSM
>         metadata. That means you can have MDRAID manage the RAID
>         volumes, and
>         the RAID0 and RAID1 can be managed with DMRAID as well.
>         Although Intel
>         no longer supports DMRAID usage for its external metadata and
>         recommends
>         using MDRAID for management.