A dual stage, head stack assembly (15) for a disk drive (10) having a
storage disk (32) is provided herein. The head stack assembly (15)
includes an actuator arm (18), a coarse positioner (22), a transducer
assembly (20), a base plate (26) and a fine positioner (24). The coarse
positioner (22) moves the actuator arm (18). The transducer assembly (20)
includes a load beam (50), a flexure (52) and a data transducer (54). The
base plate (26) includes at least one positioner cavity (66) which
receives the fine positioner (24). A control system (17) directs current
to the coarse positioner (22) to move the actuator arm (18) to position
the data transducer (54) at or near a target track (36) on a storage disk
(32). The control system (17) also directs current to the fine positioner
(24) to precisely position and maintain the data transducer on the target
track (36). Because the fine positioner (24) independently moves only the
transducer assembly (20), a higher system band-width is achieved.