Grrr. FC[5|6] won't boot after install on Sun Fire x4200

[David Nedrow <dnedrow usa net>]

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This has me completely flummoxed.

I have a Sun Fire x4200 with four drives internal drives on an (LSI)  
SAS1064 RAID controller. Drives 0&1 have been mirrored, as have 2&3.

The installation of FC5 (and FC6 tests) goes without a problem.  
HOWEVER, after the reboot the system stop booting at the point where  
grub should start displaying.

I've tried a number of variations, eg. grub on boot volume rather  
than MBR, etc.

Interestingly enough, if I don't mirror the drives, FC boots without  
a problem after the installation. If I then use the RAID controller  
to mirror the boot drive, I'm back to the "bad" behavior where grub  
never appears.

I hope someone out there may have run into this and solved it.

- -David

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