DECLUSTERED RAID ARRAY HAVING REDUNDANT DOMAINS

摘要

Embodiments of the present invention disclose a method, computer program product, and system for managing a RAID array of data storage devices. The declustered RAID array is configured to tolerate a predetermined number of failing data storage devices. The declustered RAID array of data storage devices is split into a plurality of regions, each of the plurality of regions is divided into a plurality of sets, and each of the sets of the plurality of sets utilizes a different combination of the data storage devices. The declustered RAID array provisions a plurality of LUNs from respective sets of each of the plurality of regions, and in response to a failure of one or more of the plurality of data storage devices, up to the predetermined number of failing data storage devices, the RAID array rebuilds at least one copy of each of the plurality of virtual LUNs.

主权项

1. A computer implemented method for managing a declustered redundant array of independent disks (RAID) array of data storage devices, the declustered RAID array configured to tolerate a predetermined number of failing data storage devices, the method comprising:
splitting the declustered RAID array of data storage devices into a plurality of regions; dividing each of the plurality of regions into a plurality of sets, each of the sets of the plurality of sets utilizing a different combination of the data storage devices; provisioning a plurality of virtual logical unit numbers (LUNs) from respective sets of each of the plurality of regions; and in response to a failure of one or more of the plurality of data storage devices, up to the predetermined number of failing data storage devices, rebuilding at least one copy of each of the plurality of virtual LUNs.