* C600 raid
@ 2013-10-24 4:31 Marcus Sorensen
2013-10-24 15:57 ` Jiang, Dave
0 siblings, 1 reply; 3+ messages in thread
From: Marcus Sorensen @ 2013-10-24 4:31 UTC (permalink / raw)
To: linux-raid
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?
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: C600 raid
2013-10-24 4:31 C600 raid Marcus Sorensen
@ 2013-10-24 15:57 ` Jiang, Dave
[not found] ` <CALFpzo7nSHPgkLETtdfRTEKh4UkR=cUyWe5AW36nfHfpoEOGNg@mail.gmail.com>
0 siblings, 1 reply; 3+ messages in thread
From: Jiang, Dave @ 2013-10-24 15:57 UTC (permalink / raw)
To: Marcus Sorensen; +Cc: linux-raid
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.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: C600 raid
[not found] ` <CALFpzo7nSHPgkLETtdfRTEKh4UkR=cUyWe5AW36nfHfpoEOGNg@mail.gmail.com>
@ 2013-10-24 16:46 ` Jiang, Dave
0 siblings, 0 replies; 3+ messages in thread
From: Jiang, Dave @ 2013-10-24 16:46 UTC (permalink / raw)
To: Marcus Sorensen; +Cc: linux-raid
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.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2013-10-24 4:31 C600 raid Marcus Sorensen
2013-10-24 15:57 ` Jiang, Dave
[not found] ` <CALFpzo7nSHPgkLETtdfRTEKh4UkR=cUyWe5AW36nfHfpoEOGNg@mail.gmail.com>
2013-10-24 16:46 ` Jiang, Dave
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