@Guido - I think grub will offer to install on all partitions marked as 'boot'. In my case this was all four /dev/sd[abcd]1 partitions, so it offered to install on all of them.
@Guido - I think grub will offer to install on all partitions marked as 'boot'. In my case this was all four /dev/sd[abcd]1 partitions, so it offered to install on all of them.