hello, F11 x86_64 updated. Installed preupgrade package and run preupgrade successfully with target F12 (Costantine). When I boot and choose the line created in grub.conf: title Upgrade to Fedora 12 (Constantine) kernel /upgrade/vmlinuz preupgrade repo=hd::/var/cache/yum/preupgrade stage2=hd:UUID=4d1780d4-6bbd-449c-8932-f12bb1d40990:/upgrade/install.img ks=hd:UUID=4d1780d4-6bbd-449c-8932-f12bb1d40990:/upgrade/ks.cfg initrd /upgrade/initrd.img I get an error that previous root device could not be found, forced to exit installer.... Reboot in F11, doing some debug: df -k gives: [root ~]# df -k Filesystem 1K-blocks Used Available Use% Mounted on /dev/mapper/vg_virtfed-lv_root 12381360 8580336 3172108 74% / /dev/cciss/c0d0p1 198333 163474 34859 83% /boot tmpfs 6104292 0 6104292 0% /dev/shm root filesystem (on LV, I imagine supported...) [root ~]# tune2fs -l /dev/mapper/vg_virtfed-lv_root | grep UU Filesystem UUID: fa312b21-9db9-4ddc-b8eb-684cfb076941 /boot filesystem on partition: [root ~]# tune2fs -l /dev/cciss/c0d0p1 | grep UU Filesystem UUID: 4d1780d4-6bbd-449c-8932-f12bb1d40990 [root ~]# ll /boot/upgrade/ total 146584 -rw-r--r-- 1 root root 23540852 2009-11-09 01:06 initrd.img -rw-r--r-- 1 root root 122544128 2009-11-09 01:07 install.img -rw-r--r-- 1 root root 276 2009-11-17 17:26 ks.cfg -rw-r--r-- 1 root root 3423296 2009-11-09 01:06 vmlinuz ks.cfg created by preupgrade contains: # ks.cfg generated by preupgrade lang en_US.UTF-8 keyboard us bootloader --upgrade --location=none upgrade --root-device=UUID=fa312b21-9db9-4ddc-b8eb-684cfb076941 reboot %post grubby --remove-kernel=/boot/upgrade/vmlinuz rm -rf /boot/upgrade /var/cache/yum/preupgrade* %end so the rott device and other things seems ok.... Only the bootloader string is not quite clear... donna if created wrong or not... Thanks for help, Gianluca