Asus DSBF-DM/SAS - Manual (Page 140)

5-30 Chapter 5: RAID configuration
5.2.9 Enabling the WriteCache
You may enable the RAID controller’s WriteCache option to improve the data
transmission performance.
When you enable WriteCache, you may lose data when a power interruption
occurs while transmitting or exchanging data among the drives.
To enable WriteCache:
1. From the Management Menu, select Objects > Adapter, then press <Enter>
to display the adapter properties.
2. Select WriteCache, then press <Enter> to turn the option On (enabled).
3. When finished, press any key to continue.