In Oracle 11g there is this new procedure which runs Orion (likely) from inside the database. You can get the IO per second, latency and MB per second of your disk sub-system.
Asynch IO needs to be set to true not to get an error.
SET SERVEROUTPUT ON DECLARE lat INTEGER; iops INTEGER; mbps INTEGER; BEGIN -- DBMS_RESOURCE_MANAGER.CALIBRATE_IO (<DISKS>, <MAX_LATENCY>, iops, mbps, lat); DBMS_RESOURCE_MANAGER.CALIBRATE_IO (4, 10, iops, mbps, lat); DBMS_OUTPUT.PUT_LINE ('max_iops = ' || iops); DBMS_OUTPUT.PUT_LINE ('latency = ' || lat); dbms_output.put_line('max_mbps = ' || mbps); end; /
And the results:
max_iops = 13817 latency = 3 max_mbps = 103