Index: /trunk/src/VBox/Devices/Storage/DevAHCI.cpp
===================================================================
--- /trunk/src/VBox/Devices/Storage/DevAHCI.cpp	(revision 43625)
+++ /trunk/src/VBox/Devices/Storage/DevAHCI.cpp	(revision 43626)
@@ -1321,4 +1321,5 @@
             /* Clear command issue register. */
             pAhciPort->regCI = 0;
+            pAhciPort->regSACT = 0;
             /* Clear current command slot. */
             pAhciPort->u32CurrentCommandSlot = 0;