Magnetic disk device
US11948604B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 10, 2022 |
| Grant date | Apr 2, 2024 |
| Priority date | — |
| Expiry date | Jun 18, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to an embodiment, a magnetic disk device includes a magnetic disk, a magnetic head that accesses the magnetic disk, a motor that moves the magnetic head, a ramp, a motor driver, and a processor. When a voltage value of a power supply voltage falls below a first threshold, the motor driver starts a retract operation of retracting the magnetic head to the ramp by controlling a voltage applied to the motor. When the voltage value of the power supply voltage falls below a second threshold larger than the first threshold, the processor transmits an instruction related to applying a brake to the movement of the magnetic head to the motor driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.