A disk drive includes a drive circuitry, a suspension, a slider assembly
that includes a read/write head, and a pressure compensator. The pressure
compensator is electrically decoupled from the drive circuitry. A portion
of the pressure compensator has a volume that passively changes when an
ambient pressure near the pressure compensator changes. The pressure
compensator at least partially offsets a change in a head-to-disk spacing
that occurs when an ambient pressure near the pressure compensator
changes. The pressure compensator can exert a force on the slider
assembly to change a pivot angle between the suspension and the slider
assembly, and/or to change a pitch angle between the slider assembly and
the storage disk. In alternate embodiments, the pressure compensator can
include a piston that moves or a resilient membranous material that
changes shape based on changes in ambient pressure.