Head velocity derating for data storage devices including disk media
US12223982B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2023 |
| Grant date | Feb 11, 2025 |
| Priority date | — |
| Expiry date | Dec 24, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A Data Storage Device (DSD) includes a disk to store data, at least one head to read and write data on the disk, and a Voice Coil Motor (VCM) to move the at least one head over the disk. An upper velocity limit is reduced for moving the at least one head to perform a command to read or write data at a target location on the disk as a precautionary measure against damaging the at least one head during an Emergency Power Off (EPO) state. The upper velocity limit is reduced in response to the target location being in an Outer Diameter (OD) region of the disk, a direction needed to move the at least one head being in an Inner Diameter (ID) to OD direction, and a starting position being at least as radially far from an OD region position as a predetermined threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.