Hard disc cut straightly environmental simulation structure

The utility model provides a switch and light emitting diode (LED) that hard disc cut straightly environmental simulation structure mainly contains and locates the hard disc. Wherein, the end in the DASP of hard disc, its first contact connection in light emitting diode's negative pole are connected to the main contact of the switch to and circuit board, server or the magnetic disc array card of computer, and make light emitting diode's positive pole connect in the positive supply, its second contact connection in ground end (GND). It plants when the hard disc groove of computer to be convenient for the hard disc, switches the switch to the second contact, makes DASP termination ground, and makes light emitting diode shone by circuit board, server or the magnetic disc array card supply power supply point of computer to prevent that the hard disc from producing the start -up overtime, thereby make the hard disc start promptly after the power supply.