Title :
Detection of defective media in disks
Author :
Kari, Hannu H. ; Saikkonen, Heikki ; Lombardi, Fabrizio
Author_Institution :
Dept. of Comput. Sci, Helsinki Univ. of Technol., Espoo, Finland
Abstract :
The authors present new improved methods for detecting latent sector faults in a disk subsystem as caused by media deterioration of the disk magnetic storage material. Usually, sectors in a disk are accessed using uneven patterns causing some of the sectors to be accessed only seldom. In case of media deterioration on the rarely accessed sectors, a latent disk fault may remain undetected for a long time. To detect latent sector faults, a disk is scanned through periodically. An adaptive algorithm is proposed to utilize the idle time for the disk for scanning commonly used disks that comply with SCSI-II interface standards
Keywords :
magnetic disc storage; SCSI-II interface standards; adaptive algorithm; defective media; disk magnetic storage material; disk subsystem; idle time; latent disk fault; latent sector faults; media deterioration; queue length; repair; scanning time; Adaptive algorithm; Computer science; Degradation; Delay; Fault detection; Magnetic materials; Magnetic memory; Materials science and technology; Modems; Statistics;
Conference_Titel :
Defect and Fault Tolerance in VLSI Systems, 1993., The IEEE International Workshop on
Conference_Location :
Venice
Print_ISBN :
0-8186-3502-9
DOI :
10.1109/DFTVS.1993.595628