[CentOS] Intel RST RAID 1, partition tables and UUIDs

Mon Nov 16 20:36:10 UTC 2020
John Pierce <jhn.pierce at gmail.com>

the main advantage I know of for bios fake-raid is that the bios can boot
off either of the two mirrored boot devices.    usually if the sata0 device
has failed, the BIOS isn't smart enough to boot from sata1

the only other reason is if you're running MS Windows desktop which can't
do mirroring on its own

On Mon, Nov 16, 2020 at 10:23 AM Jonathan Billings <billings at negate.org>

> On Sun, Nov 15, 2020 at 07:49:09PM -0500, H wrote:
> >
> > I have been having some problems with hardware RAID 1 on the
> > motherboard that I am running CentOS 7 on. After a BIOS upgrade of
> > the system, I lost the RAID 1 setup and was no longer able to boot
> > the system.
> The Intel RST RAID (aka Intel Matrix RAID) is also known as a
> fakeraid.  It isn't a hardware RAID, but instead a software RAID that
> has a fancy BIOS interface.  I believe that the mdadm tool can examine
> the RAID settings, and you can look at /proc/mdstat to see its status,
> although from what I remember from previous posts, it's better to just
> let the BIOS think it's a JBOD and use the linux software RAID tools
> directly.
> --
> Jonathan Billings <billings at negate.org>
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-john r pierce
  recycling used bits in santa cruz