How to take OS Backup of SLES 10 on DVD....???

Dear All,

I have two intel xeon servers running with SLES 10 on a cluster environment (Veritas Cluster 4.1 - 2 Node Cluster - Active Passive). Both the systems are having hardware RAID 1 for OS disk. Both the systems are having DVD writer.

I would like to take the OS backup on DVD which can be bootable in case both the hard disk fails. Is there any backup software which I can use to take the entire OS backup (4GB) on DVD? Can someone help me out to do this on SLES 10???

Thanks & Regards,
jumadhiya.