How do I know if my DVD Burn was successful?

I just used nero cd/dvd speed to attempt to verify the quality of my
first back up. I compared the quality to the original scene for scene.
I just don’t want any compromise in quality, that’s all. But is it
enough confirmation that the dvd burned without any error message
along the way? Or will I encounter a scenario in which I back a DVD up
with let’s say DVD Decrypter… everything looks fine, then I go to
play the copy a week later and find the audio is off, or something
lame like that… I guess I want a way to know the burn was successful
before I play it.

here’s a link to an image capture of the ‘benchmark’ test.

http://s414.photobucket.com/<wbr>albums/pp228/FitzgerBlue/?<wbr>action=view&current=HL-DT-<wbr>STBDDVDRW_GGC-H20L_103_15-Oct.<wbr>jpg

I have no idea what it all means. I don’t have the option of doing
the ‘disc quality’ test option. I don’t know why that is, I have an LG
burner. I guess my question is, should I sell my LG Blu-Ray optical
drive, and buy a lite-on optical drive then use that in conjunction
with Kprobe? Or should is there a way to do disk quality scans with my
burner? Or do I even need disk quality scans??

I’m really stuck here… Thanks a lot for helping out.