dd if=/dev/disk2 of=/path/to/new/AppleTV.img bs=1024k
dd if=/path/to/new/AppleTV.img count=1335 of=/dev/disk2 bs=1024k
$ diskutil eject disk2
$ gpt remove -i 4 disk2
$ diskutil eject disk2
$ gpt show disk2
$ diskutil eject disk2
$ gpt add -b 5125000 -i 4 -t hfs /dev/disk2
$ diskutil eraseVolume 'Journaled HFS+' Media /dev/disk2s4
$ sudo rm -rf /Volumes/OSBoot/.Spotlight-V100
$ sudo rm -rf /Volumes/Media/.Spotlight-V100