Hi At the end, my situation is: I try to use a prebuilded XEN version and Source version but the problem is still the same. Without make initrd i receive this error: "VFS: Cannot open root device "hda5" or unknown-block(0,0) Please append a correct "root=" boot option Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)" ok....I try to create a initrd like this: mkinitrd -v -f --with=aacraid --with=sd_mod --with=scsi_mod -o /boot/initrd-2.6.18-xen.img -k 2.6.18-xen Now seems to be XEN start but after memory message and little count down I received this error: "can''t find /mnt in /etc/fstab. ERROR: no /sbin/init found on rootdev (or not mounted!). Trouble ahead." Then I have kernel panic and system restart. So I check ext3 options and I look that is compiled like a module!! I try now to compile this one built-in. I use this procedure: make linux-2.6-xen-config CONFIGMODE=menuconfig i select ext3 compiled built-in...no like a module... make linux-2.6-xen-build make linux-2.6-xen-install config file have EXT3 options = y now. vmlinuz for xen is changed, xen-3.1.gz no... I still have the same previous error about /mnt and init!! This is my config files: Slackware12: http://doxspace.altervista.org/config-huge-2.6.21.5 XEN3.1: http://doxspace.altervista.org/config-2.6.18-xen I think continue to generate a bad mkinitrd...You can say to me if my mkinitrd creation procedure is correctly? I must copy some others file in /boot/initrd-tree dir and re-create initrd? I have tried all the roads… I don''t know more where to break the head...ghghgh.... TNX Best Regards. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users