Abstract: A method for maintaining data coherency in a dual Input/Output(I/O) adapter having primary and secondary adapters, wherein each of the primary and secondary adapters includes resident write cache data and directory storage devices. The method includes utilizing a split point to separate each of the cache data and directory storage devices into first and second regions, wherein the first regions contain the primary adapter cache data and directory information and the second regions contain the secondary adapter cache data and directory information. Information stored in the primary adapter cache data and directory storage devices is mirrored into the secondary adapter cache data and directory storage devices or, alternatively, information stored in the secondary adapter cache data and directory storage devices is mirrored into the primary adapter cache data and directory storage devices utilizing a dedicated communication link, such as a high-speed serial bus, between the primary and secondary adapters.

Abstract: An apparatus and method for collecting liquid spillage at rail facilities including the plurality of center pans (10) and side pans (14) arranged in end to end relation. The pans (10, 14) are formed of a plastic material, preferably high density polyethylene. Each pan (10, 14) has a vertical drain pipe (54, 78) which fits within an elastomeric sleeve (60) about an upper drain opening (34) in a transverse drain conduit (28) positioned between a pair of crossties beneath the pans (10, 14). Each center pan (10) has a resilient upwardly inclined side flange or lip (44). For installation, the center pan (10) is preferably installed by first inserting one resilient side flange (44) beneath the head (16) of an adjacent rail (12) and then lowering the bottom (40) of the pan (10) onto the upper surface of the crossties (24) with drain pipe (54) received in sealing relation within the aligned elastomeric seal (60).