I asked on askubuntu and was pointed over here.
Long-story short, I had to completely format both my hard drives. So, I need to reinstall my dual-boot of Windows 7 and Ubuntu. One problem. I lost my Windows 7 installation disk.
However, after a bit of searching, I found an old Ubuntu boot disk that I don't need due to it being an outdated version. The boot disk only has 793MB written to it, out of the 4.7GB a DVD offers.
This is more than enough for me to write the Windows 7 ISO to it.
Problem though. It's in DVD+R format, not DVD-RW, which means I can't format the disk.
So my question is if there is any way to delete or otherwise void the data in that sector so I can write the Windows 7 ISO to the disk without any conflicts. Anything?
Quick note: I've tried installing Win7 via USB thumbdrive, external HDD, and even SD card, with no success. That's not an option for me. It has to be in disk format.