A method is disclosed for writing servo patterns for tracks on a rotating magnetic disk medium of a magnetic disk drive. In addition, the present disclosure provides a method for sealing water leaks in irrigation tubing, the method including wrapping a wrap-around irrigation tube patch around a damaged section of irrigation tubing and sealing said patch around the irrigation tubing via a closure mechanism. The retractor may be used for retracting an incision to receive an instrument therethrough. The meter also includes a heat generating component positioned in the first compartment and operably associated with the base.