RAID Storage System with Logical Data Group Rebuild

A computer-implemented method, comprising:

• accessing a logical group index for a plurality of storage devices configured as a storage array for storing a plurality of logical data groups distributed among the plurality of storage devices, wherein:
• the logical group index comprises a logical group map for each of the plurality of logical data groups;
• and
• the logical group map identifies logical blocks corresponding to each of the plurality of logical data groups;
• writing the plurality of logical data groups in a configuration of redundant array of independent disks (RAID) stripes across at least one RAID group in the plurality of storage devices;
• and
• in response to a failed storage device failing among the plurality of storage devices:
• identifying a replacement storage device for rebuilding the failed storage device;
• rebuilding the failed storage device to the replacement storage device based on the configuration of RAID stripes;
• tracking completed rebuilds of logical blocks from the failed storage device during a device rebuild process;
• comparing the completed rebuilds of logical blocks to at least one logical group map in the logical group index during the device rebuild process;
• and
• setting a logical group rebuild status to complete for at least one logical data group in response to all logical blocks in the at least one logical data group having been rebuilt in the device rebuild process.

A system, comprising:

• means for accessing a logical group index for a plurality of storage devices configured as a storage array for storing a plurality of logical data groups distributed among the plurality of storage devices, wherein:
• the logical group index comprises a logical group map for each of the plurality of logical data groups;
• and
• the logical group map identifies logical blocks corresponding to each of the plurality of logical data groups;
• means for writing the plurality of logical data groups in a configuration of redundant array of independent disks (RAID) stripes across at least one RAID group in the plurality of storage devices;
• means for identifying a replacement storage device for rebuilding a failed storage device;
• means for rebuilding the failed storage device to the replacement storage device based on the configuration of RAID stripes;
• means for tracking completed rebuilds of logical blocks from the failed storage device during a device rebuild process;
• means for comparing the completed rebuilds of logical blocks to at least one logical group map in the logical group index during the device rebuild process;
• and
• means for setting a logical group rebuild status to complete for at least one logical data group in response to all logical blocks in the at least one logical data group having been rebuilt in the device rebuild process.