Patent ID: 7003689
Filing Date: 2006-02-21
Classification: G06F,G11B

Abstract:
1. A disk drive apparatus for audio visual data in which an arbitrary sector provided in an alternate area on a disk is allocated as an alternate sector for a defective sector on the disk, comprising: means for computing a maximum allowable time period for restoration of a sector in which an error occurs, on the basis of a command processing time period designated by a host using the disk storage apparatus, when the error occurs upon access to the disk designated by a command supplied from the host, the command processing time period enabling realtime processing; means for determining use of the computed maximum allowable time period as a maximum error retry time period; means for controlling retry of the sector, in which the error occurs, within the determined maximum error retry time period; means for storing an error log in a storage device, if retry of the sector, in which the error occurs, does not succeed within the determined maximum error retry time period, the error log including the command, an address assigned to the sector in which the error occurs, and the command processing time period designated by the host, the sector in which the error occurs being determined to be possibly defective; means for sequentially reading non-processed error logs stored in the storage device; means for controlling access to a sector indicated as possibly defective by each of the non-processed error logs whenever said each of the non-processed error logs is read; and means for allocating an arbitrary sector in the alternate area on the disk in place of the sector indicated as possibly defective, if the retry does not succeed within the determined maximum error retry time period, the sector indicated as possibly defective being determined to be really defective.