METHOD FOR AUTOMATICALLY CHANGING READ PARAMETER TO OPTIMIZE READ CHANNEL OF HDD USING PRIORITY

摘要

PURPOSE: A method for automatically changing read parameter to optimize a read channel of an HDD(Hard Disk Drive) is provided to recover a read error reliably and efficiently by automatically upwardly adjusting a priority of a read channel parameter having a high error recovery frequency when a data read error is generated in the HDD. CONSTITUTION: An error recovery frequency list is sorted in down order by the error recovery frequency(50). After executing a read parameter changing function set by the first item of the list, a microcontroller retries to read data(52). When the data is read again, it is checked that the error is recovered at the same position(54). If the read error is generated again, the microcontroller retries to read the data after executing the read parameter changing function set by the second item(56). If the error is not recovered, it is judged that the current executing item is the last item(60). In case of non-last item, the microcontroller retries to read the data by executing the read parameter changing function set by the next item. If the error is recovered, an automatic read parameter changing method is terminated after increasing the error recovery frequency of the corresponding item and resetting a standard read parameter(64).