I decide to migrate my workstation to raid0, to get better performance.I used Carbon Copy Cloner software, to backup my current installation on another hdd.After that boot with installation disk ( in my case I boot installation over the network) and create stripped array ( it has to consist of two hard drives).I restored my installation over the raid0 array with firewire cable and carbon copy cloner, it works perfectly!!!

I run benchmark utility and here are the results.

Hard disk speed before raid array

The new raid0 array

Now, the disk speed is improved

My workstation