1. A solid state storage subsystem, comprising: an array of non-volatile solid state memory; and data interface circuitry, comprising: a controller that accesses the array of non-volatile solid state memory in response to commands received from a host system at a first hardware interface associated with a first data path, wherein the controller is configured to maintain monitor data of the array of non-volatile solid state memory and transmit user data from the array of non-volatile solid state memory to the host system through the first data path; and a monitor data transmission engine configured to send the monitor data to the host system on a second data path distinct from the first data path, wherein the second data path is associated with a second hardware interface.