looking for simple soft raid1 guide

i have read guide from the following links
1. http://doc.opensuse.org/products/dra.../raidroot.html
2. http://doc.opensuse.org/products/dra.../raidyast.html

following the instructions i manage to install opensuse13.1 with raid1 with disk1 and disk2.

my question ?
1. in case of disk1 fail , how do i boot from disk2 .
2. once I have a replacement for disk1 , how do i do rebuild .after rebuild how do i set it back to boot on disk1