Erase RW disc and burn linux .iso

How to burn a linux .iso to a RW disc? Btw, the disc has data inside, so I have to erase it and then burn the iso image to the disc Update: After burning the linux iso I can't mount the cdrom, and the dvd won't boot too on computer start. 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. 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 Note: If i remove dvd this partitions stay mounted and accecible