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

fYear

1993

fDate

27-29 Oct 1993

Firstpage

49

Lastpage

55

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Defect and Fault Tolerance in VLSI Systems, 1993., The IEEE International Workshop on

Conference_Location

Venice

ISSN

1550-5774

Print_ISBN

0-8186-3502-9

Type

conf

DOI

10.1109/DFTVS.1993.595628

Filename

595628