公开(公告)号：US12288574B1

公开(公告)日：2025-04-29

申请号：US18615310

申请日：2024-03-25

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Sandeep Bhushan ,  Lewis Scott Kessinger Patterson ,  Phillip Kevin McGinnis ,  Piengphen Swangsmutchai

IPC: G11B11/10 ,  G11B5/02 ,  G11B27/36 ,  G11B5/00

Abstract: A method for calibrating a hard drive having a heat-assisted magnetic recording head is provided. The method includes performing, across an increasing temperature ramp, a first set of write/read operations using the head, performing, across a decreasing temperature ramp, a second set of write/read operations using the head, generating performance data associated with the head based on the first set of write/read operations and the second set of write/read operations, calculating a comparison value based on the performance data associated with the head and performance data associated with a plurality of heads, and adjusting an operating parameter value of the head based on the comparison value exceeding a threshold, the adjusted operating parameter reducing a likelihood that a laser of the head will exhibit write instability.