The integrated AES encryption engine of the TVS-673e works hard to lessen the effects of encrypted data transfers. It offers better write performance than read performance, losing just 8MB/s in RAID 6 and RAID 5 with a 1GbE connection as opposed to the 14.6MB/s and 16.2MB/s loss in read performance when in RAID 5 and 6 respectively.
Be sure to check out our sponsors store EKWB here