isobuster

hey i got a dvd it has some 840 mb data on it.. i get dat when i check in properites but when i open it no data.. i used isobuster but it says no media present... help

I have original CDs of Kal Ho Na Ho. Prob is that its first disc has broken. Not completely but a little bit at the outer end. It just seems like a deep scratch. I tried to copy it with Alcohol 120% & Isobuster (ofcourse ignoring errors). Isobuster fails at 25%. Then I tried with Alcohol, & it's...

i purchased doom3 recently.but one of cds gets a scratch as it dropped down.now it does not getting installed.i scan the cd with isobuster it says one of files is not readable.is there any site where i can get these missing files?.

Are there any iso tools like ISObuster, UltraISO, etc in linux, where can i find them??