Problem burning DVD with TS-L532R

Hi,
I own a HP Pavllion Laptop which came with TS-L532R Combo DVD +- R Writer. I have been not able to burn a single perfect DVD with it. I have used Record Now (OEM) and Nero and used Intex DVD+R(4X), Samsung DVD-R(8x) and Amkette DVD-R(4X) Media.

I am able to burn CD's perfectly with the drive though.

First I tried to burn couple of Intex DVD+R (DATA DVD) with Record Now and during burning process i used to get error so I thught media might be a problem, so, i thought of changing media.

Than I bought couple of Samsung Pleomax DVD -R 8X media. And I used Record Now to burn the files (DATA DVD) and the burned process completed successfully. Then I tried to copy the files back to my HDD to check whether they were copied correctly. Some of the files got copied correctly and in some of them I was getting CRC error. So, now I thought software was the problem. So, I download Nero 7 Premium.

Than I tried to burn another Samsung media in Nero Express using speed as 4X and data verification tool on. The burning process was completed sucessfully, but the data verfication failed on the DVD. I used Nero Scan tool too on it and 99.1 % good, 0.7 % Damaged and 0.1% Bad sectors. I tried to copy the files to my HDD and out of 24 files, i was not able to copy 6 files.

Than i thought of trying another media, So i bought amkette DVD-R 4X and tried buring it at 2X (Thought slower the better) with Nero Express. The burning went smoothly. This time I turned off the verification feature (Just in case). Than I run Nero Scan tool and again I had bad sectors...

So, is it common on a DVD to have bad sector, or there is a problem with my drive? I have the Nero Log File and the screen shot of the DVD scan if any one wants it. Please advise, help needed

 

Sorry, but posted the second thread only after not seeing my first thread. Than I tried to close one of the thread too but there is no button to do so. Admin, please close one of the thread.