A magnetic recording disk drive has a fly-height sensor on the slider that supports the readwrite head. A sensor image acquisition module acquires a sensor image. The organofunctional siloxane oligomers are applied to a metal surface prior to the application of a topcoat and function to inhibit corrosion of the metal surface. The processor is configured to send information to be displayed to the first display unit or the second display unit or both depending on the display type property detected. The invention further relates to a SONOS-type device including the nitride barrier layer. The bleaching composition is substantially devoid of a peroxygen bleach or a peroxy-based or peroxyl-generating bleach system.