> is it a real dual processor machine or HyperThreading. > > I am assuming that the drivers work for the drives, that you see them > all via fdisk -l, and that they are the correct size, etc. > > Maybe try booting to the non-smp (regular) kernel for building the RAID. maybe, but at least on my dual xeon (2 cpus, 4 hyperthreads) it works... Cheers, MaZe.