Windows – How to check if two DVDs are exactly the same

dvdfile-comparisonUbuntuwindows

I have two DVDs and if I open the DVDs and copy the content to the HDD and compare the respective files on the HDD it shows no difference. As I know DVD does also have some additional content (this content includes information saying if the DVD is bootable and some formating information I guess).

How can I check also this additional content?

Is it somehow possible without additional programs, using Windows or Ubuntu?

Best Answer

The easiest way to determine if 2 discs are the same is to run a hash of both of them:

sudo md5sum /dev/cdrom

If the hashes match, the disks are exactly the same. However this will not tell you what is different about them. Even if a single bit is different you would get a totally different hash.

You can check the partition table of a disc with fdisk:

sudo fdisk -l /dev/cdrom
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