Installing grub2-bios into a raw partition instead of MBR gap

[Christian Eggers]

I would like to install grub2 to a non-EFI machine with Windows+Linux (MBR 
partition
table). As Linux uses LVM and the first partition starts at sector 63, there is 
not enough
space in the MBR gap for grub. But I have a spare partition before the LVM 
starts (/dev/
sda5, 1 MB) where I would like
to install grub.

# grub2-install /dev/sda5
grub2-install error embedding is not possible but this is required for raid and 
lvm install

Why is "embedding" required for a LVM install? I understand that
installing grub into a file system or LVM has it's own problems. But
why can't I use a bare partition (like on an EFI system)?

regards
Christian