AFS only stores one timestamp?

[Larry Schwimmer]

        This is a simple question, but I didn't see any mention in the
faq and I don't have access to the manuals right now.
        It never occured to me until I needed to adjust the mtime
separately from the atime that it would appear that AFS doesn't
keep both atime and mtime.  stat(2) returns the same value for all
three timestamps.

                        yours,
                                Larry