Hi Scott. Can you tell me where i can find the script? Becuase in my file is no script to compile. Or do you mean that? http://www.3ware.com/KB/article.aspx?id=12690 But the question is work that with centos? What driver i must create SMP or not and what is the difference >To build UP module, type: >make -f Makefile.rh >The file created is 3w-9xxx.o >To build SMP module, type: >make smp -f Makefile.rh >The file created is 3w-9xxx.smp And what i must put in to initial the ramdisk on CentOS. Redhat from the site above /sbin/mkinitrd -v -f /boot/init-2.4.21-4.EL.img init-2.4.21-4.EL Cent OS ??? /sbin/mkinitrd -v -f /boot/2.4.21-27.0.2.ELsmp vmlinuz-2.4.21-27.0.2.Elsmp My kernelversion is root@server8 [/boot]# uname -r 2.4.21-27.0.2.ELsmp And on this site http://www.3ware.com/KB/article.aspx?id=12706 stay that the drivers will not work with centos. But i don?t understand WHY. Redhat and Centos has the same architecture or not? Maybe anyone can told me what i must do now :) I am very confused. Thanks for help Sven