A method of affecting power used by an electronic device is provided for an electronic device having storage media and running at least one application. The sealing arrangement comprises a series of sealing elements or units S1, S2, S3, at least one of which comprises a brush seal. The sensor and control interact so that the control causes a detectable signal to be generated as an incident of the sensor being changed from the armed state into the breached state. A mechanism implements these queue pairs and completion queues in hardware. Some embodiments include methods of selecting memory cells. The assembly includes two pairs of light pipes, each of which is provided with integrated support members.