Linux backup using tar

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http://serverfault.com – Im new to linux backup. Im thinking of full system backup of my linux server using tar. I came up with the following code: tar -zcvpf /archive/fullbackup.tar.gz --exclude=/archive --exclude=/mnt --exclude=/proc --exclude=/lost+found --exclude=/dev --exclude=/sys --exclude=/tmp / and if in need of any hardware problem, restore it with cd / tar -zxpvf fullbackup.tar.gz But does my above code back up MBR and filesystem? Will the above code be enough to bring the same server back? Thanks (HowTos)