MacPro doesn't recognise Corsair SSD
I have a MacPro early 2009 and installed a Corsair Force GS SSD. After cloning and a reboot it runs smoothly. Unfortunately after a second reboot, MacPro doesn't see the Corsair disk anymore. What do I do wrong?
Mac Pro, OS X Mavericks (10.9.1), Corsair SSD Force GS 180Gb