IOCTL_DISK_PERFORMANCE https://msdn.microsoft.com/en-us/library/windows/desktop/aa365183(v=vs.85).aspx https://msdn.microsoft.com/en-us/library/windows/desktop

IOCTL_DISK_PERFORMANCE https://msdn.microsoft.com/en-us/library/windows/desktop/aa365183(v=vs.85).aspx https://msdn.microsoft.com/en-us/library/windows/desktop/aa3... This relies on IO performance counters enabled for the target drive, but that's typically the case. If they are off, they can be enabled with "diskperf.exe".