Multisession burn failed space recoverable?

i was burning a 3gb game on dvd -r using an external dvd writer …
i used nero 7 … its data dvd with multisession enabled…it failed at near 10% percent and now when i burn again its shows mere 1.5gb ?? :eek:
actual burned data is not at all more than 300mb …

can i recover tat space?? :frowning:
thanks once again for help…

can anybody reply with yes or no… i ll be satisfied…

No.

for what multisession?

i tried today… icant burn anymore … after my burning failed at 10% i tried to burn again, it gives following error " not able to write disk at once on open disk"

is my dvd wasted??