Areca 24/4 Internal/External Port Pcie 3.0 12 Gb/s SAS/SATA Raid Controller 2Gb Cache - Manual (Page 240)

APPENDIX
240
Appendix G
Full Volume Encryption
ARC-1882/1883 RAID adapters have featured with controller based
hardware encryption function. Controller based hardware encryption
describes the encryption of data occurring at the disk array controller
before being sent to the disk drives. The hardware encryption does not
impact the performance of ARC-1882/1883 RAID controller and can
implement on any kinds of HDD that is transparent to the user, the OS,
and applications. You can follow below steps to enable the function.
Step 1. Create RAID Set