Hello every body. think you Dieter Stüken for you response. I'm still working on a virtual machine with Red Hat Entreprise 3. So don't worry if I break it I'm working with 2 hard disks of 8GB. The first is partitioned like this sda1 boot (101 MB) sda2 / (7400MB) sda3 swap (573 MB) I followed exactly the steps in the LVM-HOWTO excepted that I added the second Hard disk sdb. I made an lvm partion sdb1 and I put all the root data (size 6GB) on it. The new partition is /dev/vg00/root Then, I had a problem : when I type "lvmcreate_initrd", the RAM disk can't be created because of the lack of space ( I'm not sure of that). I used "lvmcreate_initrd -D", the instruction returns 0 ( it means ok). But when I reboot, there is kernel panic. so if I use initrd, i don't know if i need that!!!!!!! Think you for helping me _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/