Fantec SQ-X2RU3e Manual - Page 21

About USB & eSATA Connectivity  The equipped USB3.0 port is downward compatible with USB2.0  eSATA host(PC) needs to support Port Multiplier function in order to have Normal Mode(Single) to connect 2 HDDs correctly.  If eSATA host(PC) doesn't support hot swappable plug and play function, Please try following procedure: a. Connect eSATA cable when case and PC are powered off. b. Power on case first and observe HDD Link LED(s) are light on c. Power PC on This practice procedure is every time reconnection necessary.  Connecting USB & eSATA simultaneously is impossible. eSATA connection will be prioritized. About Fan  This case is equipped with manual fan speed control for faster/slower fan. However, in order for efficient heat dissipation, it is strongly recommended that max speed (adjusting to the right-most, +) is set at all time.  Fan synchronizes along with power synchronization function. After the case reaches sleep mode, the fan stops within 2 mins. 20