System and method for autonomous data scrubbing in a hard...

Details System and method for autonomous data scrubbing in a hard... System and method for autonomous data scrubbing in a hard...

2006-11-14

2006-11-14

Baderman, Scott (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S718000

Reexamination Certificate

active

07137038

ABSTRACT:
A RAID subsystem with a plurality of hard disk drives has each disk controller autonomously executing data scrubbing on its disks instead of requiring the RAID controller to execute data scrubbing. The data scrubbing may be interrupted upon an I/O request from the RAID controller, or it may continue if a guaranteed scrub rate is not being achieved. Data is stored in large bands of concentric data tracks, and a band may be preferentially selected for scrubbing based on frequency of reading the band, or recency of writing to the band.

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patent: WO 02/088922 (2002-11-01), None
Dissertation by Hannu H. Kari, Helsinki University of Technology, Espoo, Finland. Latent Sector Faults and Reliability of Disk Arrays: 1996.

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