Felix,

Here are answers to the questions that you asked...

>Did you install GRUB 2 to a MBR of a different disk then /boot/grub is
>on?

No, I have a RAID1 boot configuration with GRUB 2 installed to the MBR
of both drives so that I can boot from either one.


>Check if `echo $prefix' or just `set' in GRUB's commandline shows prefix
>as a normal GRUB device (hdx,y)/boot/grub or as
>(UUID=abc123...)/boot/grub
>If it's UUID= it can happen that it still accesses the floppy device.

When I check $prefix, it's set to "(md0)/boot/grub.


FWIW, I put about half of a dozen "echo" commands at the top of my grub.cfg 
file to determine if the error was a result of something in grub.cfg or not.  I 
found that the error occurred before the "echo" commands were processed, so the 
problem doesn't seem to be related to the contents of grub.cfg.  (Which doesn't 
necessarily rule out the possibility that it's related to finding grub.cfg in 
the first place...)

Makes me wonder if this error isn't BIOS specific.  The machine that I
get the error on has AMI bios.  I did a klean Karmic install on two
different machines with Award bios and didn't see the error on either of
them...

-- 
grub2 shows 'biosdisk read error', then boots
https://bugs.launchpad.net/bugs/396564
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