Sequential /random disk read and write %

Dear Experts ,

can some one guide me from where i can find the exact values over a period of months for sequential/random disk (Input/ouput) reads and writes , i have searched on st03n >> workload >> database there i can see no of sequential read and direct access , i could sum up these values and get the required values for read at least but when i compare them to the data i get from st04 it somehow does not match

for st04 i can see much more number of physical reads ,i am assuming the sum of sequential reads and #accesses from st03n should sum up to the physical read field from st04

can anyone please support

Best Regards,

Shubham Jain