18119730. MAGNETIC DISK DEVICE AND METHOD OF ADJUSTING PREHEAT TIME simplified abstract (KABUSHIKI KAISHA TOSHIBA)
Contents
MAGNETIC DISK DEVICE AND METHOD OF ADJUSTING PREHEAT TIME
Organization Name
Inventor(s)
Hiroshi Isokawa of Yokohama Kanagawa (JP)
Takuya Matsumoto of Kawasaki Kanagawa (JP)
MAGNETIC DISK DEVICE AND METHOD OF ADJUSTING PREHEAT TIME - A simplified explanation of the abstract
This abstract first appeared for US patent application 18119730 titled 'MAGNETIC DISK DEVICE AND METHOD OF ADJUSTING PREHEAT TIME
Simplified Explanation
The patent application describes a magnetic disk device that includes magnetic disks, magnetic heads with heat-assist units, and a control unit that adjusts the preheat time for each magnetic head based on the quality of the recording signal.
- Magnetic disk device with heat-assist magnetic heads:
- Magnetic heads have heat-assist units to apply preheating current. - Preheating current does not erase data already written on the disk. - Control unit measures time from start of write to signal quality convergence.
Potential Applications: This technology could be used in high-density data storage devices such as hard disk drives or archival storage systems.
Problems Solved: 1. Preventing data loss due to erasure during preheating process. 2. Ensuring optimal recording signal quality for data integrity.
Benefits: 1. Improved data storage efficiency and reliability. 2. Enhanced performance of magnetic disk devices. 3. Extended lifespan of storage media.
Potential Commercial Applications: "Enhancing Data Storage Efficiency with Heat-Assist Magnetic Heads"
Possible Prior Art: Prior art may include patents related to heat-assist technologies in magnetic recording devices or methods for optimizing recording signal quality.
Unanswered Questions: 1. How does the control unit determine the optimal preheat time for each magnetic head? 2. Are there any potential drawbacks or limitations to using heat-assist magnetic heads in magnetic disk devices?
Original Abstract Submitted
According to one embodiment, a magnetic disk device includes magnetic disks, a plurality of magnetic heads, and a control unit. A plurality of magnetic heads each includes a heat-assist unit which applies a preheating current of such magnitude that data already written to the magnetic disk is not erased to a near-field optical element for the preheat time. The control unit measures the time elapsing from a start of write to the time when a value of an index indicating the quality of a recording signal of data written by the magnetic head converges to within a first threshold range, and adjusts the preheat time for each of the magnetic heads in such a manner that the measured lapse time becomes less than or equal to a second threshold.
