Data storage device balancing and maximizing quality metric when configuring arial density of each disk surface

摘要

A data storage device is disclosed comprising a plurality of disk surfaces, and a head actuated over each disk surface. For each disk surface, a quality metric is measured at a plurality of discrete areal densities including a first areal density comprising a first radial density and a first linear density, and a second areal density comprising a second radial density different from the first radial density and a second linear density different from the first linear density. Based on a target capacity, an areal density is selected for each disk surface such that the combined areal densities satisfies the target capacity and such that the quality metrics across the disk surfaces are substantially equal and substantially maximized.

主权项

1. A data storage device comprising:
a plurality of disk surfaces; a head actuated over each disk surface; and control circuitry configured to:
for each disk surface, measure a quality metric at a plurality of discrete areal densities including:
a first areal density comprising a first radial density and a first linear density; anda second areal density comprising a second radial density different from the first radial density and a second linear density different from the first linear density; andbased on a target capacity, select an areal density for each disk surface such that the combined areal densities satisfies the target capacity and such that the quality metrics across the disk surfaces are substantially equal and substantially maximized.