Inventor

TSAI CHUN SEI

US37 patents

⚠️ This page may combine multiple inventors who share the name “TSAI CHUN SEI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

TSAI CHUN SEI

WESTERN DIGITAL TECH INC

Disk drive write verifying unformatted data sectors

Disk drive employing different servo TPI to data TPI ratios across the disk surface

Disk drive refreshing zones in segments to sustain target throughput of host commands

Disk drive storing parameters of a write operation in a plurality of data sectors

Disk drive prioritizing in-the-field defect scanning based on number of write operations in each of a plurality of defect zones

Disk drive returning dummy data to a host when reading an unwritten data sector

Disk drive to characterize misaligned servo wedges

Disk drive biasing refresh zone counters based on write commands

Grease wear leveling for a disk drive

Disk drive generating actual data TPI profile by combining segments of predetermined data TPI profiles

Disk drive calibrating bias signal for touchdown sensor

Disk drive identifying starting track by performing multiple load operations

Management of sequentially written data

Data storage device controlling head fly height based on temperature

Electronic system with data refresh mechanism and method of operation thereof

Electronic system with data management mechanism and method of operation thereof

Data storage device with selective write to a first storage media or a second storage media

Data storage device employing different frequency preambles in adjacent data tracks

Disk drive calibrating failure threshold based on noise power effect on failure detection metric

Disk drive calibrating defect threshold based on statistical quality metric measured for reference tracks

Data storage device with selective write to a first storage media or a second storage media

Data storage device delaying seek operation to avoid thermal asperities

Data storage device screening heads by verifying defects after defect scan

Disk drive detecting different asperities on a disk using different sensor bias settings

Dynamic track interference write counting for magnetic disks

Embedded multi-attribute machine learning for storage devices

TSAI CHUN SEI

Disk drive biasing a refresh monitor with write parameter of a write operation

Hybrid drive storing write data in non-volatile semiconductor memory if write verify of disk fails

Hybrid drive storing copy of data in non-volatile semiconductor memory for suspect disk data sectors

Hybrid drive employing non-volatile semiconductor memory to facilitate refreshing disk

Refresh operations using write/read commands

Hard-disk drive work load profiling and capturing systems and methods

Systems and methods for indication of activity status of a storage device

CHUNG HEON HO

Methods and devices for preventing potential media errors from growing thermal asperities

DINH PETER H

Throttled command completion time

CHAN TOM S

Disk drive executing retry operation after adjusting jog value in response to gain control

SURATMAN DODY

Disk drive connecting defect shapes to preempt data loss