CDRoom won't mount DVD RW after burning OS to DVD using brasero

I burned a debian distro to a DVD RW and the DVD won't boot to install the distro, if I insert the disc while on OS, the cdrom won't mount. Also if I open gparted it stays "scanning all devices..." forever. I've also noticed that the were mounted 3 discs or partions after burning the disc. update: if i run sudo mount /dev/sr0 the terminal stays waiting forever update: it shows this mounted discs or partitions but the cdrom/optical drive can't mount the dvd nor can be detected