METHOD FOR SETTING UP BIT ERROR RATE CRITERION AND METHOD FOR BURN-IN TEST OF HARD DISK DRIVE

摘要

A method for setting up a BER(Bit Error Rate) criterion of a hard disk drive and a burn-in test method using the same are provided to minimize errors in determination of a qualified hard disk drive by modifying BER criterion in accordance with temperature variation of the hard disk drive. A burn-in test method comprises the steps of: measuring temperature of a hard disk drive(S10); modifying a BER criterion by setting a new BER criterion greater than a BER criterion at an optimum temperature for burn-in test if the measured temperature of the hard disk drive is greater than the optimum temperature for burn-in test, while setting a new BER criterion smaller than the BER criterion at the optimum temperature for burn-in test if the measured temperature of the hard disk drive is smaller than the optimum temperature for burn-in test(S20); calculating the BER of the hard disk drive(S30); and determining the hard disk drive as disqualified if the calculated BER of the hard disk drive is smaller than the new BER criterion, while determining the hard disk drive as qualified if the calculated BER is equal to or greater than the new BER criterion(S40).