Location selection based on erasure code techniques

A method, comprising:

• monitoring data transfer speeds for each storage location of a plurality of storage locations located on a plurality of storage disks of a disk drive, wherein:
• the disk drive comprises a plurality of storage disks implementing a Random Array of Independent Disks (RAID) storage device configuration,
• each storage disk of the plurality of storage disks in the RAID storage device configuration includes at least an inner storage track and an outer storage track for storing data,
• at least one storage disk in the plurality of storage disks includes a fast storage disk, and
• at least one storage disk in the plurality of storage disks includes a slow storage disk;
• determining a current data transfer speed for each storage location of the plurality of storage locations positioned on the plurality of storage disks based on the monitored data speed characteristics for each storage location, wherein:
• each storage location is positioned on a storage track of a storage disk comprising one of:
• the outer storage track located on any storage disk of the plurality of storage disks,
• the inner storage track located on any storage disk of the plurality of storage disks,
• any storage track located on the fast storage disk,
• any storage track located on the slow storage disk,
• the outer storage track located on the slow storage disk,
• the inner storage track located on the slow storage disk,
• the outer storage track located on the fast storage disk, and
• the inner storage track located on the fast storage disk, and
• storage locations located on the outer storage track of each storage disk include faster data transfer speeds than storage locations located on the inner storage track of the same storage disk;
• determining data transfer speed differences between each different storage location in the plurality of storage locations located on the plurality of storage disks of the disk drive;
• identifying an erasure code technique of a plurality of erasure code techniques associated with a current data chunk of a plurality of data chunks;
• and
• writing the current data chunk to a selected storage location in the plurality of storage locations on the plurality of storage disks of the disk drive,
• wherein:
• each erasure code technique in the plurality of erasure code techniques is associated with a data transfer speed of a plurality of data transfer speeds,
• at least two erasure code techniques include different data transfer speeds of the plurality of data transfer speeds, and
• the selected storage location is selected based on an intersection of the current data transfer speed determined for the selected storage location, the erasure code technique associated with the current data chunk, and a data transfer speed difference between the selected storage location and at least one other storage location in the disk drive.

A computer program product comprising a computer-readable storage medium including program instructions embodied therewith, the program instructions executable by a processor to cause the processor to:

• monitor data transfer speeds for each storage location of a plurality of storage locations positioned on a plurality of storage disks of a disk drive, wherein:
• the disk drive comprises a plurality of storage disks implementing a Random Array of Independent Disks (RAID) storage device configuration,
• each storage disk of the plurality of storage disks in the RAID storage device configuration includes at least an inner storage track and an outer storage track for storing data,
• at least one storage disk in the plurality of storage disks includes a fast storage disk, and
• at least one storage disk in the plurality of storage disks includes a slow storage disk;
• determine a current data transfer speed for each storage location of the plurality of storage locations positioned on the plurality of storage disks based on the monitored data speed characteristics for each storage location, wherein:
• each storage location is positioned on a storage track of a storage disk comprising one of:
• the outer storage track positioned on any storage disk of the plurality of storage disks,
• the inner storage track positioned on any storage disk of the plurality of storage disks,
• any storage track positioned on the fast storage disk,
• any storage track positioned on the slow storage disk,
• the outer storage track positioned on the slow storage disk,
• the inner storage track positioned on the slow storage disk,
• the outer storage track positioned on the fast storage disk, and
• the inner storage track positioned on the fast storage disk, and
• storage locations positioned on the outer storage track of each storage disk include faster data transfer speeds than storage locations positioned the inner storage track of the same storage disk;
• determine data transfer speed differences between each different storage location in the plurality of storage locations positioned on the plurality of storage disks of the disk drive;
• identify an erasure code technique associated with a current data chunk of a plurality of data chunks;
• and
• write the current data chunk to a selected storage location in the plurality of storage locations,
• wherein:
• each erasure code technique in the plurality of erasure code techniques is associated with a data transfer speed of a plurality of data transfer speeds,
• at least two erasure code techniques include different data transfer speeds of the plurality of data transfer speeds, and
• the selected storage location is selected based on an intersection of the current data transfer speed determined for the selected storage location, the erasure code technique associated with the current data chunk, and a data transfer speed difference between the selected storage location and at least one other storage location in the disk drive.