It really depends on your OPS Manual. For example we do not need any raw data coverage at all as long as we do have 2 FMC, 2 IRS and 2 GPS operating and ANP is below required RNP (0.15 for approaches, 0.30 for departures). Even if raw data is available it does not need to be cross checked if the above conditions exist. Granted, that is under EU-OPS instead of US or korean regulations.