In a magnetic disk unit, a number of heads that is settable to a usable setting is less than a maximum number of heads providable in the magnetic disk unit. A combination of the diazabutadiene DAB-Cy and Pd2 was found to form an excellent catalyst for the Suzuki-Miyaura cross-coupling of various aryl bromides and activated aryl chlorides with arylboronic acids. Methods of increasing at least one valuable agronomic trait in a plant are provided comprising applying a composition comprising seaweed extract and fish hydrolysate to the plant. A plurality of magnets is attached to the bottom side of the panel.