Am Montag, den 07.12.2009, 21:55 +0000 schrieb jim_charlton:
> update-grub
> grub-install /dev/sda
> grub install /dev/sdb
> and then reboot.  The grub prefix (set command from the grub shell on
> booting) is still (md0)/grub!
> Hmmmm??  /etc/grub.d/00_header has
> 
> ..
> transform="s,x,x,"
> ..
> ..
> ..
> ..
> grub_prefix=`echo /boot/grub | sed ${transform}`
> ..

If your /boot is a seperate RAID array it has to be /grub.
GRUB doestn't really have the concept of linux/unix where you only have
one / and then have all other partitions there mounted.

> Is that where the grub "prefix" gets set?

It gets set in the $grub_mkimage line with the --prefix option.

-- 
Felix Zielcke
Proud Debian Maintainer and GNU GRUB developer

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