The burners nowadays are DL (Dual Layer), not Dual Burning. The DL denotes the burners ability to burn onto DL media which has about twice the amount of space of a standard SL (Single Layer) disc. The advantage of using DL media is there shouldn’t be any compression needed, thus obtaining basically a 1:1 copy of whatever you are backing up. The downfall is the price of the media…typically around $2 per disc, whereas, SL discs are around $.30 each.
In my personal experience I find most things require little or no compression and for the important stuff I might use a DL, but always make an SL too and really can’t see a difference. Find some Verbatims on sale sometime and try it yourself as you will be the ultimate judge as to whether or not the quality is where you want it to be.
