Polezhaevdmi,   Normally we don't support performance-based questions, but what I would recommend is that you call in so that an agent can explain more about the graph. The reason being is that while you are not reading the data incorrectly, there is more to the numbers that what you are seeing, and I think it would be easier to explain directly.     
While investigating customer's SC5020F load via web-console, I found the performance is displayed as weird numbers (look at the screenshots). The most left column looking almost OK, taking into account decimal delimiters. But the average counters have decimal delimiters only... Thus, the system utilization is ~27M IOPS and 10 TB/s? This is out of datasheet claimed parameters, at least (~1M IOPS per system). As I'm not able to install and check the same counters via DSM Client, could You check and confirm the correct counters scaling? I'm suspecting the IOPS and MB/sec must be divided by 1000. Thank You![IMAGE]
Unisphere for SC performance counters scaling