I Could not install grub using this guide. I got an Error 22.

I first had to correct the hd0 in /boot/device.map to  /dev/mapper/isw_bfgggbebhf_diskset

And also edited /boot/grub/menu.lst so that the root devices in the boot options pointed to the correct (hd0,x)

I installed dmraid in the chrooted environment "apt-get install dmraid" and scanned for devices "dmraid -ay"