Patent attributes
Example redundant array of independent disks (RAID) storage systems and methods provide rebuild of logical data groups. Storage devices are configured as a storage array for storing logical data groups distributed among the storage devices. The logical data groups are written in a configuration of RAID stripes in the storage devices. A failed storage device may be rebuilt using the RAID stripes and completed rebuilds of logical blocks may be tracked during the device rebuild process. A logical group rebuild status may be determined by comparing the completed rebuilds of logical blocks to a logical group map. The logical group rebuild status for each logical data group may be provided as complete in response to all logical blocks in the logical data group having been rebuilt. In the event the array rebuild fails, the logical groups that did complete rebuild may be brought online as a partially completed rebuild to prevent the loss of the entire array.
