Abstract: A system and method for determining whether activity graphs (hereinafter “graphs”) for logical volumes of data storage are correlated. A number of correlation criteria are applied to the graphs, including the area ratio criteria determines whether an area ratio described by the graph is at least as great as a predetermined value; the peak ratio criteria indicates that one graph is correlated to another graph if a peak ratio described by the two graphs is as large as a predetermined peak ratio value; and the sharp peak criteria indicates in the event that one graph is correlated to another graphs having at least one coincidental peak. Different combinations of all or some of the disclosed correlation criteria and the traditional correlation coefficient may be used to determine whether graphs of logical volumes are correlated, the level of correlation, and how “strong” of a correlation exists between the graphs.