When my camera is in B&W mode, no data is thrown away. The raws are the same, still color. It may be different for non-canons, though I doubt it, and it is diff

When my camera is in B&W mode, no data is thrown away. The raws are the same, still color. It may be different for non-canons, though I doubt it, and it is different if you are producing jpegs obviously.