Bootable, Redundant Backup?

whoops

sfdisk -d /dev/sda > part_table

sfdisk /dev/sdb < part_table --force

reboot

grub-install --recheck --root-directory=/backup /dev/sdb

mkfs.ext4 /dev/sdb1,2,5 (sdb3 is swap, sdb4 is "Extended")

[root@testbox ~]# mkdir /backup
[root@testbox ~]# mkdir /backup/boot
[root@testbox ~]# mkdir /backup/home
[root@testbox ~]# mount /dev/sdb1 /backup/boot -t ext4
[root@testbox ~]# mount /dev/sdb2 /backup -t ext4
[root@testbox ~]# mount /dev/sdb5 /backup/home -t ext4

[root@testbox ~]# mount -o bind -t proc /proc /backup/proc/
[root@testbox ~]# mount -o bind -t dev /dev /backup/dev/
[root@testbox ~]# mount -o bind -t sysfs /sys /backup/sys/

rsync -aAXv --progress --exclude={"/dev/*","/proc/*","/sys/*","/tmp/*","/run/*","/mnt/*","/media/*","/lost+found"} /* /backup