Data storage device with intelligent write protection for energy anomalies in energy-assisted magnetic recording

A method comprising:

• detecting, by one or more processing devices, individually or in combination, via a detector of a selected head of one or more heads of a data storage device comprising one or more disks and an actuator system configured to position the selected head proximate to a corresponding disk surface among the one or more disks, an energy anomaly at an energizing interface of the selected head during a write operation, wherein the selected head comprises a write element, an assistive energy emitter, the energizing interface, and a detector, wherein the energizing interface is coupled to the assistive energy emitter, and wherein the assistive energy emitter is driven separately from driving of the write element;
• interrupting the write operation in real time, by the one or more processing devices, individually or in combination, in response to detecting the energy anomaly, and detecting whether a previously written track yields an anomalous readback signal amplitude;
• and
• rewriting, by the one or more processing devices, individually or in combination, in response to detecting that the previously written track yields an anomalous readback signal amplitude, data designated for the previously written track to the previously written track.

One or more processing devices, individually or in combination, comprising:

• means for detecting, via a detector of a selected head of one or more heads of a data storage device comprising one or more disks and an actuator system configured to position the selected head proximate to a corresponding disk surface among the one or more disks, an energy anomaly at an energizing interface of an energy-assisted write system of the selected head during a write operation, wherein the selected head comprises a write element, an assistive energy emitter, the energizing interface, and a detector, wherein the energizing interface is coupled to the assistive energy emitter, and wherein the assistive energy emitter is driven separately from driving of the write element;
• means for interrupting the write operation in real-time, in response to detecting the energy anomaly, and detecting whether a previously written track yields an anomalous readback signal;
• and
• means for rewriting, in response to detecting that the previously written track yields an anomalous readback signal, data designated for the previously written track to the previously written track.