i3en.xlarge is currently not getting tuned properly. A quick test using Scylla AMI ( ami-07a31481e4394d346 ) reveals that the storage capabilities under this instance are greatly reduced: $ grep iops /etc/scylla.d/io_properties.yaml read_iops: 257024 write_iops: 174080 This patch corrects this typo, in such a way that iotune now properly tunes this instance type. Closes #9298