Patent ID: 9104604
Filing Date: 2015-08-11
Classification: G06F

Abstract:
1. A method for reducing a probability of generating an unrecoverable error on a disk array during a disk rebuild, the method comprising the steps of: generating, by one or more processors, a record of reads and writes being made to a plurality of disks included in a disk array, wherein the record indicates a hot spot included in a first disk of the plurality of disks; identifying, by one or more processors, a second disk in the disk array that has incurred a threshold number of correctable errors that dictate that the second disk be replaced with a spare disk included in the disk array; determining, by one or more processors, whether the hot spot included in the first disk includes data that will be used to rebuild the second disk using the spare disk; responsive to an occurrence of both i) an identification of a second disk in the disk array that has met the threshold number of correctable errors that dictate that the second disk be replaced with a spare disk and ii) a determination that the hot spot included in the first disk includes data that will be used to rebuild the second disk using the spare disk, initiating, by one or more processors, scrubbing of data in a region of the first disk that includes the hot spot, wherein scrubbing of data in the region of the first disk reduces a probability of generating an unrecoverable error on the disk array during a rebuild of the second disk using data of the first disk; replacing, by one or more processors, the second disk with the spare disk; and rebuilding, by one or more processors, data included in the second disk on the spare disk using data included on the first disk that was scrubbed.