RAID0 - I can't do it with two WD 3TB RED HDD >HELP<

[Corrados]

I have OSX Maverics on SSD drive. I try build RAID0 with two internal SATA connected WD 3TB RED drives, but I cant do it. First I format them to Mac OS Extended (Journaled) with ZERO OUT DATA option. Before that, when I mark my WD 3TB RED drives in Disk Utility, I cant see RAID option for them, this option disappears in Disk Utility. Why?

I have another internal drive WD 1TB, and fot this drive I can mark RAID option.

 

[Corrados]

The problem solved. RAID0 created in Disk utility on two WD 3TB Red drives works perfectly.