On Wed, Dec 02, 2015 at 08:53:39PM +0100, Axel Glienke wrote:
Creating snapshot:
[root@lvmtest ~]# lvcreate -L5G -s -n root_snap /dev/centos/root Reducing COW size 5,00 GiB down to maximum usable size 2,94 GiB. Logical volume "root_snap" created. [root@lvmtest ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert root centos owi-aos--- 2,93g root_snap centos swi-a-s--- 2,94g root 0,00 swap centos -wi-ao---- 1,00g
--- reboot ---
dracut shell (missing /dev/centos/root)
cat proc/cmdline: BOOT_IMAGE=/vmlinuz-3.10.0-229.20.1.el7.x86_64 root=/dev/mapper/centos_root ro rd.lvm.lv=centos/root rd.lvm.lv=centos/swap crashkernel=auto rhgb quiet LANG=de_DE.UTF-8 systemd.debug
shouldn't you have a new grub entry with: root=/dev/mapper/root_snap rd.lvm.lv=centos/root_snap
Tru