Patent ID: 9530440
Filing Date: 2016-12-27
CPC Classification: G11B

Claim Text:
1. A method comprising: for a magnetic head having multiple TMR read sensors, setting, by one or more computer processors, a first voltage limit for a plurality of parts and a second voltage limit for all of the parts; determining, by one or more computer processors, a number of TMR read sensors which are allowed to function between the first and the second voltage limits using a probability algorithm, wherein the probability that application of the second voltage limit will result in a dielectric breakdown within an expected lifetime of a drive is below a threshold value; and responsive to determining a number of TMR read sensors which are allowed to function at voltages between the first and second voltage limits, determining a number of TMR read sensors which are allowed to function at the second voltage limit, wherein the probability that a TMR read sensor is defective and allowed to function between the first and the second voltage limits comprises: