Grub (in the menu) has the following commands: root (hd0,1) kernel /vmlinuz-2.6.32-279.el6.x86_64 ro root=/dev/mapper/vg_resolve02-lv_root rd_NO_LUKS LANG=en.US.UTF-8 rd_NO_MD crashkernel=128M rd_LVM_LV=vg_resolve02/lv_root SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet pcie_aspm=off When I successfully booted manually, I removed "rhgb quiet" and added "rdshell" to that line. To the best of my memory, that line is stock, I don't recall ever changing it permanently. The names of the volume group and logical volume in that line correspond to my actual root device. -- Joakim Ziegler - Supervisor de postproducción - Terminal joakim at terminalmx.com - 044 55 2971 8514 - 5264 0864 On 22/03/13 21:33, Barry Brimer wrote: >> When I booted the box after this, I got a kernel panic, the typical >> "Can't find root device". > >> Reading https://fedoraproject.org/wiki/How_to_debug_Dracut_problems , I >> did the following: >> >> # lvm vgscan >> # lvm vgchange -ay >> >> And then >> >> # ln -s /dev/mapper/<volumegroup>-<root_volume> /dev/root >> # exit >> >> After this, the box boots up normally, and everything works as it >> should. However, when I reboot, it again fails to find the root device. >> >> So, after all this, my question is, how do I make Dracut (I'm assuming) >> understand that this LVM volume is my root device and pick it up >> automatically? > > What does your kernel line in grub look like? > > Barry > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >