IOCTL_STORAGE_CHECK_VERIFY2 control code
Determines whether the media has changed on a removable-media device - the caller has opened with FILE_READ_ATTRIBUTES. Because no file system is mounted when a device is opened in this way, this request can be processed much more quickly than an IOCTL_STORAGE_CHECK_VERIFY request.
Input is identical to the input for IOCTL_STORAGE_CHECK_VERIFY.
Output is identical to the output for IOCTL_STORAGE_CHECK_VERIFY.
I/O status is identical to the I/O status for IOCTL_STORAGE_CHECK_VERIFY.