Patent ID: 7920350

Claim:
A hard disk drive (HDD) device comprising: a housing; a magnetic storage medium coupled with said housing, said magnetic storage medium rotating relative to said housing; an actuator arm coupled with said housing, said actuator arm moving relative to said magnetic storage medium; a slider assembly comprising a perpendicular magnetic recording read/write head comprising a write element which magnetically writes data to said magnetic storage medium and a read element which magnetically reads data from said magnetic storage medium; one or more processors; and one or more sequences of instructions which, when executed by said one or more processors, cause performance of, in response to a miss, determining the radial position of said read/write head relative to said storage medium, accessing data recovery information corresponding to said radial position, wherein said data recovery information characterizes one more data recovery steps to be performed in response to a miss corresponding to said radial position, and wherein said data recovery information is based on the physical shape of a pole of said write element and how said physical shape of said pole affects data cross-track error associated with said read/write head.