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The "Fatal Error: Disc Read Error" in Call of Duty: Ghosts is a notorious technical hurdle, particularly localized to the "Homecoming" mission where corrupted files like homecoming.ff often prevent players from completing the campaign. Review of the "Homecoming" Error Experience

If you are on PC and verification fails twice, your RAM or VRAM might be unstable. Run a memory test. Also, check if you have modded skins or FOV changers—these break the "Homecoming" level specifically.

This is the console equivalent of a PC defrag.