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== CD/DVD Burn Troubleshooting ==Problem: DVD write process fails when attempting to burn ISO image. Error "Could not perform start of Disc-at-once"Solution: Upgrading your CD/DVD drive firmware often resolves this issue. The drive firmware has an internal database of different media types. Due to sloppy standards, especially in DVD writable media, that list requires updating from time to time. Download the latest firmware for your DVD burning drive from the manufacturer.