A system and method for handling data by file system offloading, selectively separates the data-accessing function and data-processing function, wherein a host CPU is used in conjunction with a host OS and a basic FSD. The forged composite powder metal part includes a outer section concentrated with a first powder metal material, a inner section concentrated with a second powder metal material and a variable boundary profile between the materials of the two sections. The compressive stress, advantageously, increases the pinning field in the self-pinned pinned layer structure, while providing a high resistivity so that less sense current is shunted by the capping layer structure compared to an all metal capping layer structure that provides a comparable compressive stress.