You can improve the read performance of your storage system by enabling read reallocation on volumes. Read reallocation is disabled by default.
What read reallocation is
For workloads that perform a mixture of random writes and large and multiple sequential reads, read reallocation improves file layout and sequential read performance.
Enabling or disabling read reallocation
You can enable read reallocation on traditional volumes and FlexVol volumes to improve subsequent read performance of a file. You can also disable read reallocation.