Magnetic disk apparatus and control method
US12417037B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 20, 2024 |
| Grant date | Sep 16, 2025 |
| Priority date | — |
| Expiry date | Aug 20, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/2081
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a magnetic disk apparatus according to an embodiment, a power supply circuit generates second power from first power supplied by an external power supply, and generates third power when the first power is cut off. The third power is generated based on regenerative energy generated by stoppage of a motor. A controller writes data received from a host device to a magnetic disk via a cache area by the second power while the first power is supplied, and executes a backup process when the first power is cut off. The backup process is executed by disabling communication with the host device and saving content of the cache area to the first memory by the third power. A monitoring circuit keeps connection with the external power supply even when the first power is cut off. The controller enables communication with the host device when the first power is restored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.