 When the file system is mounted, and the integrity check is conducted, these hashes are verified.Mounting also includes comparison of the version of the exFAT file system by the driver to make sure the driver is compatible with the file system it is trying to mount, and to make sure that none of the required directory records are missing (for example, the directory record for the upcase table and Allocation Bitmap are required and the file system can't run if they are missing).If any of these checks fail, the file system should not be mounted, although in certain cases it may mount read-only.