Embodiments of the present invention are directed to an apparatus and
method for guiding bypass reentry flow through filter integrated in a
bypass channel sidewall in a hard disk drive. The method provides a
bypass channel for directing airflow away from a first portion of a disk
of the hard disk drive and toward a second portion of the disk of the
hard disk drive, the bypass channel comprising an inner bypass channel
sidewall and an outer bypass channel sidewall. The method further
provides a first filter portion integral with the inner bypass channel
sidewall, the filter portion for filtering a first portion of the airflow
directed toward a third portion of the disk of the hard disk drive
wherein a second portion of said airflow is directed toward the second
portion of said disk drive.