P55-UD3 Raid 5 not bootable

[The Khemst]

Hi All

For some reason I have no idea why my raid 5 is not showing as bootable.

I have 4 X WD 1TB drive in Raid 5 in the intel raid bios, but it does not show as bootable. 

Does anyone know why this would be? and how to make it bootable?

Thanks in advance.

Dave

[The Khemst]

*Update*

If I create a 3 disk raid 5 it is marked as bootable 

Still need the had a 4 disk raid though