How can I validate an installation DVD?

I have downloaded an Ubuntu ISO and burned it to DVD. While installing from the DVD onto VirtualBox I got an error which suggested either the HDD or DVD or overheating were the cause. I am investigating all three. How can I verify that the DVD has been correctly burned (I still have the original ISO file)?


How to check the MD5SUM https://help.ubuntu.com/community/HowToMD5SUM

Ubuntu Hashs https://help.ubuntu.com/community/UbuntuHashes

This should give you the information needed to verify the .ISO