From Suvayu Ali (in the "Getting rid of /boot" thread)
Could you please point me to the documentation for this? I would
really like to read up more and understand what limitations/advantages
I might have as I have been waiting for this to be included since F10.
Sorry Suvayu. Just remembered that you had asked for this info.
This is from the Grub 2 wiki:
http://grub.enbug.org/LVMandRAID