Creating LiveCD and LiveUSB problem

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http://forums.fedoraforum.org – Hi all, Ubuntu 12.04 desktop, 64bit I have following ISO download on Fedora website Fedora-17-x86_64-Live-Desktop.iso Verified sha256sum correct 1) Create LiveUSB by running # dd if=/path/to/.iso of=/dev/sdb It went throught without complaint. But the USB can't boot 2) Ran; Brasero Disc Burner to burn CD, without complaint But the LiveCD can't boot; Code: mount: wrong fs type, bad option, bad superblock on /dev/mapper/live-rw ..... dracut Warning: Can/t mount root filesystem Dropping to debu shell dracyt:/# [ 239.943866] end_request: I/O error, dev sr0, sector 1319528 ...... I (HowTos)