Dual booting with PCI/SATA 3 card
I have the same Sonnet card, and I cannot dual boot with it the regular way (entering Bootcamp by holding down option during boot) because the SATA3 card breaks that functionality. However, I am able to dual boot with it using a workaround. I'll describe my setup and maybe that will help you.
On the Sonnet card I have one SSD installed (Intel 520 series, 180 gb). It contains OSX system partition and my applications.
I have a 1 TB HD drive installed in a regular bay, which has my Bootcamp partition (Windows 7), which I installed using the Bootcamp manager. I think using the Bootcamp manager to install Windows is important, so that OSX can see the windows partition.
To switch to Windows from OSX I go to System Preferences>Startup Disc and then choose Bootcamp Windows. (which is why it might be necessary to use Bootcamp manager to install Windows. Otherwise that choice might not appear). Then I restart the computer and it boots into Windows.
Once I want to switch back to OSX from Windows, I restart the computer and hold down cmd+option+P+R. (
Many Thanks to TKawaguchi, see
https://forums.macrumors.com/threads/1379815/ ). What this does is restore the default OS, which should be OSX. I hold it down until the Mac chimes and goes to a white screen. You can release the keys. By itself it will cycle once more and chime again! Then it will go to white screen and then OSX login screen finally appears. That's it.
Note: While in Windows, I cannot use the Bootcamp utility (which appears as a small diamond shaped icon in the system tray) to return to OSX. Its functionality is also broken by using the SATA3 card.
So it's a little workaround. Hope this helps!
