A docking station for an electronic device is provided. The light emitting module includes a plurality of circuit boards sequentially arranged parallel to each other, a plurality of first LED chips which has lenses covered thereon being mounted on the circuit boards, and a plurality of second LED chips which has no lens covered thereon being mounted also on the circuit boards. A recording element may be in an air bearing surface near the trailing edge of the face, wherein there is no other slider or other supporting surface on an opposite side of the recording medium. The throughput test is paused in response to a change in the state of the network indicative of a network state that is unacceptable for performing the throughput test.