Shared storage parity on raid

A computer program product comprising a computer readable storage medium having program instructions embodied therewith, wherein the computer readable storage medium is not a transitory signal per se, the program instructions readable by a processor, executable by the processor, or readable and executable by the processor to cause the processor to perform a method comprising:

• determining, by the processor, that a data storage drive in a first array has failed;
• determining, by the processor, a location to rebuild the failed data storage drive;
• instructing, by the processor, performance of a rebuild operation at the determined location;
• determining, by the processor, one or more data storage drives in one or more arrays having a combined amount of available space that is sufficient to mirror data and/or parity information of the first array;
• instructing, by the processor, mirroring of the data and/or parity information of the first array in parallel with performing the rebuild operation;
• instructing, by the processor, deletion of the mirrored data and/or parity information of the first array from the one or more data storage drives in the one or more arrays in response to the rebuild operation being completed;
• and
• instructing, by the processor, reallocation of the space in the one or more data storage drives in the one or more arrays used to mirror the data and/or parity information of the first array as available space.

A system, comprising:

• a processor;
• and
• logic integrated with the processor, executable by the processor, or integrated with and executable by the processor, the logic being configured to:
• determine, by the processor, that a data storage drive in a first array has failed;
• determine, by the processor, a location to rebuild the failed data storage drive;
• instruct, by the processor, performance of a rebuild operation at the determined location;
• determine, by the processor, one or more data storage drives in one or more arrays having a combined amount of available space that is sufficient to mirror data and/or parity information of the first array;
• instruct, by the processor, mirroring of the data and/or parity information of the first array in parallel with performing the rebuild operation;
• instruct, by the processor, deletion of the mirrored data and/or parity information of the first array from the one or more data storage drives in the one or more arrays in response to the rebuild operation being completed;
• and
• instruct, by the processor, reallocation of the space in the one or more data storage drives in the one or more arrays used to mirror the data and/or parity information of the first array as available space.