Patent ID: 6239931
Filing Date: 2001-05-29
Classification: G11B

Abstract:
A method of reassigning a data sector by detecting a soft defect during reading data in a hard disk drive, said method comprising the steps of:(1) during reading data of a target sector, performing an error recovery routine when an error is generated in an initial error correction capability;(2) determining whether an error is recovered after performing said error recovery routine;(3) repeating the error recovery step, while varying the initial error correction capability (ECC), if the error is not recovered; and if the error is recovered in an ECC not having a maximum, increasing an error rate; and if the error is recorded in a maximum ECC, reassigning the data sector to a preliminary sector to increase an error rate;(4) decreasing the error rate if the error is not generated during reading data of a target sector; and(5) setting an error correction capability based on an error rate calculated by increasing and decreasing the error rate and reading data of a next target sector.