Abstract: An embodiment of the invention provides an apparatus and method that use auto support data for upgrade compatibility. The method includes capturing the input commands that are used by a user (customer) of a storage appliance and that are processed by a current storage operating system in the storage appliance. These input commands are then stored in a database and are the auto support data that is transmitted from the storage appliance via a network to the database. These input commands can be recorded or categorized in the database, based upon the command name or command line arguments of the input commands. These input commands can then be mapped to new input commands that are used with an upgraded storage operating system in a storage appliance. These mapping can be implemented in, for example, a data structure that maps previous input commands to new input commands.