install debian RAID 0

I have the next hardware 2 x sata 160 gb (raid 0)(chipset nforce4 CK804) In the install process, when the system is installing the kernel-image apears the next error /usr/sbin/mkinitrd: device /dev/part3 is not a block device Failed to create initrd image. dpkg: error processing kernel-image-2.6

install Debian on raid 0

I have the next hardware 2 x sata 160 gb (raid 0)(chipset nforce4 CK804) In the install process, when the system is installing the kernel-image apears the next error /usr/sbin/mkinitrd: device /dev/part3 is not a block device Failed to create initrd image. dpkg: error processing kernel-image-2.6