need some help with backup

Hello,

I am new to using AIX. I am trying to figure out how to make a backup of the system. there is a rootvg and a datavg on it. I would like to get both but datavg is the one i really need. I have tried using mksysb to burn to a dvd but it does not look like it is writing to the disk. the step i tried was to mount a cifs and do i backup to there. I got an error that it could not connect. when I try it again it says that i have cifs mounted. I would like to be able to get this sent a a share i have on a windows 2008 server.

thanks