Patent ID: 6018428
Filing Date: 2000-01-25
Classification: G11B

Abstract:
A read error recovery apparatus for use in a disk storage system having an MR head for reading data from a disk, comprising:first means for detecting thermal asperity phenomenon occurring at the MR head on the basis of read data read from the disk by the MR head;second means for determining that position on the disk at which the thermal asperity phenomenon of the MR head occurs, if the occurrence of the phenomenon is detected;third means for counting the number of occasions wherein the thermal asperity phenomenon occurs, each time the position of the thermal asperity phenomenon is determined;recovery means for removing a read error due to the thermal asperity phenomenon if the counted number exceeds a predetermined reference value;means for calculating the sum of the count values of the third means in each MR head opposed to a corresponding data surface of the disk, each time the thermal asperity phenomenon occurs; andmeans for executing a warning operation concerning the MR head if the sum exceeds a predetermined reference value.