Tail Section
The tail section contains QNAP specific data that is used by the web interface at installation. It consists of
100 bytes, where the first 10 includes the model (QDK_BUILD_MODEL), followed by 40 unspecified reserved
bytes (some of them are used for the checksum value), 10 bytes reserved for the firmware version (not
supported in QDK), 20 bytes for the name (QPKG_NAME), 10 bytes for the version (QPKG_VER), and finally a
10 bytes flag area, which shall be set to "QNAPQPKG " for QPKG packages.