Two frequency distribution graphs are shown. The top graph shows megabytes of I/O per second by I/O type. Its horizontal axis measures seconds in increments of .05 second. Its vertical axis measures megabytes per second. The bottom graphic shows I/O requests per second by I/O type. Its horizontal axis measures seconds in increments of .05 second. Its vertical axis measures requests per second.

Both graphs have shaded areas to show the megabytes or requests, respectively, for each of four I/O types. The I/O types, listed to the right of each graphic are: Large Writes, Large Reads, Small Writes, and Small Reads. The I/O for each function is represented by a different color. The colors are stacked to show the cumulative megabytes and requests, respectively, at each fractional second.