Hello Fellows. I had since yesterday, a hardware raid controller, since yesterday because the harware wasn't working. I want to set up a software raid 1. I have a problem , i was @ http://www.enterprisestorageforum.com/technology/features/article.php/11192_3526891_1 And it says to do " $ modprobe md Then add "md" (without the quotes) to your /etc/modules.conf files to load it at boot. " But i don't have any /etc/modules.conf . Do you have any raid faq where i can set up a software raid 1 with the FC4. I already have a working system and i don't want that the disk has any problem Here is the output of fdisk -l Disque /dev/hda: 250.0 Go, 250059350016 octets 255 têtes, 63 secteurs/piste, 30401 cylindres Unités = cylindres de 16065 * 512 = 8225280 octets Périphérique Amorce Début Fin Blocs Id Système /dev/hda1 * 1 13 104391 83 Linux /dev/hda2 14 30401 244091610 8e Linux LVM Disque /dev/hdc: 250.0 Go, 250059350016 octets 255 têtes, 63 secteurs/piste, 30401 cylindres Unités = cylindres de 16065 * 512 = 8225280 octets Périphérique Amorce Début Fin Blocs Id Système /dev/hdc1 * 1 13 104391 83 Linux /dev/hdc2 14 30401 244091610 8e Linux LVM Both disk are EXACTLY the same. Thanks Franck