Comment 4 for bug 569900

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Imre Gergely (cemc) wrote : Re: mount: mounting /dev/md0 on /root/ failed: Invalid argument

I'm just curious why it this works in a KVM environment and not on real hardware. I obviously know what the difference in in terms of "hardware" but from the POV of the raid it shouldn't be that much different, right?

Those disk are identical, there's no other sd* there to throw it off, it doesn't boot from sdb, nothing else fancy is going on? Did you try zeroing the two disks before install (like with dd if=/dev/zero of=/dev/sd{a,b}) ? Just to be sure.