I ran the below command to check file system on a few DVDs.
sudo file -s /dev/sr0
The DVDs which were working had responded properly to this command. But the DVDs which were not getting burnt (by Brasero disc burner etc) showed the below error.
ravbholua@ravbholua-Aspire-5315:~/Downloads$ sudo file -s /dev/sr0 /dev/sr0: ERROR: cannot read `/dev/sr0' (Input/output error)
So, I feel the problem is with the DVDs or the file system of the DVDs.
Now is there any method (like mkfs on other medias) to make file system for those DVDs?