公开(公告)号：US11430482B1

公开(公告)日：2022-08-30

申请号：US17357030

申请日：2021-06-24

申请人： Western Digital Technologies, Inc.

发明人： Sukumar Rajauria ,  Robert Lee Smith ,  Taiebeh Tahmasebi

IPC分类号： G11B5/60 ,  G11B21/10 ,  G11B5/012

摘要： A data storage device is disclosed comprising a head actuated over a magnetic media, wherein the head comprises a write element, a read element, a laser, and a near field transducer. An operating thermal gradient of the magnetic media is periodically measured at an operating power setting for the laser that achieves a target magnetic write width. When a slope of the operating thermal gradient exceeds a threshold, a test thermal gradient and magnetic write width of the magnetic media is measured at multiple power settings for the laser in order to detect a contamination of the near field transducer.

公开(公告)号：US11783854B1

公开(公告)日：2023-10-10

申请号：US17804490

申请日：2022-05-27

申请人： WESTERN DIGITAL TECHNOLOGIES, INC.

发明人： Sukumar Rajauria ,  Robert Lee Smith

IPC分类号： G11B5/40 ,  G11B33/14 ,  G11B5/56

CPC分类号： G11B5/40 ,  G11B5/56 ,  G11B33/144

摘要： Various illustrative aspects are directed to a data storage device, comprising one or more disks; a head, configured to be positioned proximate to a disk surface among the one or more disks; a temperature sensor; and one or more processing devices. The one or more processing devices are configured to: detect, via the temperature sensor, a non-nominal heat dissipation of a portion of the head; and, in response to detecting the non-nominal heat dissipation of the portion of the head, mitigate the non-nominal heat dissipation of the portion of the head.