Thanks to the DS1517+ built in encryption engine there's only a 14MB/s drop in performance writing an encrypted folder to the NAS. Reading the encrypted data back there's hardly any loss in performance.
When tested with the various workloads that the DS1517+ might be used for in a RAID 5 setup, the NAS shows strong and very consistent performance across the workload scenarios.
Be sure to check out our sponsors store EKWB here