The present invention includes a tool assembly with a first jaw movable in relation to a second jaw between a spaced position and an approximated position. In one embodiment, a method comprises aggregating one of records and filemarks, the aggregating restricted to being performed only on read operations, from a plurality of data segments into at least one single data segment, including sequentially aggregating the one of the records and filemarks into the at least one single data segment. The extent of read errors generated by each of the plurality of tape drives are aggregated at a computational device coupled to the plurality of tape drives. As the first and second plates move between their first and second positions, the flow area of the opening is continually varied.