Abstract: In a computer system, a hard disk drive mounting structure is comprised of a mainframe, a sliding box fastened in a chamber inside said mainframe, and a hard disk drive fastened inside said sliding box by screws. The hard disk drive has a PC board inserted in a channel inside the sliding box, which PC board has a connector extending out of the sliding box and connected to a connector on a PC board fastened in the chamber inside the mainframe. The PC board in the chamber inside the mainframe is connected to the mother board of the mainframe by a bus line. The sliding box has two sliding grooves at two opposite sides respectively engaged with two rails in the chamber so that it can be drawn out of the mainframe and then pushed back into place. Retainer blocks are made on the sliding box and engaged in corresponding retaining slots inside the chamber for positioning.

Abstract: A detachable hard disc driver mounting structure, comprising a hard disc drive received inside a sliding case and fastened in a receiving chamber inside a computer mainframe through plug-in connection. The sliding case has slide ways at two opposite sides corresponding to the two opposite rails inside the receiving chamber of the computer mainframe so that it can be drawing out of the receiving chamber and then pushed back into place. Stub tenon is made on the front end of the sliding case for engaging in the retaining slot at the inner end inside the receiving chamber. I/O pins are made on the hard disc drive at one end for connecting to the mother board of the computer mainframe through an I/O bus line connector.