Accusys ExaSAN A12S2-PS - Manual (Page 77)

4. How to Use
User Guide Page 4-26
This mode is designed to provide smooth sequential access, such as during video
editing and capture, to the RAID system. To achieve best system performance, NCQ
mode is automatically turned off.
4.1.2.7.2 Cache
Cache memory in the controller enhances read and write performance, improving
overall storage throughput streaming data can be queued into the cache to