Can't find my HDD in installation?

[afubu]

Hi everyone.

I have just made a Unibeast mavericks USB and boot up my machine with the USB. After a few minutes it comes the welcome screen, but when I go to Disk Utility there's no HDD. Please tell me if there's something I should do.

Thanks in advance.
Matt

 

[tobitobst]

make sure that your SATA is set to AHCI in BIOS