A method for performing a set of diagnostics on a host system using a service processor. The method includes recognizing a power-on event, and in response checking a diagnostic flag, where the diagnostic flag indicates the set of diagnostics to be performed. Retrieving, from internal storage of the service processor, a disk image including the set of diagnostics to be performed. Mounting, using a disk image reader, the disk image to obtain a mounted disk image. Making the mounted disk image accessible as a device using a virtual device driver. Mounting, using a connection between the service processor and the host system, the device within the host system, and performing the set of diagnostics on the host system.