How to get my Mac Pro into recovery mode
I tried to install Windows 7 on the second hard drive of my new Mac Pro, but I think I deleted the 200MB-sized EFI-partition, because when I try to restart it says "no system disk. Press any key to restart", but it doesn't do anything when I press Option-key or Cmd+R. I can't get any system working. Thanks for helping me in advance!
Mac Pro, OS X Mountain Lion (10.8.2)