Red Hat Bugzilla – Bug 229160
mkinitrd fails when invoked from rescue image (LVM not initialized)
Last modified: 2008-05-06 15:14:58 EDT
Description of problem:
I just went through a horrible experience with my FC6 machine after a
motherboard update; the SATA chipset changed and I had to regenerate the initrd
The problem was that the 'chroot' environment that you get from the rescue CD
doesn't include full LVM support (lvdisplay et al.). As a result, the ramdisk
files generated by 'mkinitrd' do not initialize LVM, and the resulting system is
I've noticed this problem before when I tried to *rename* the VG containing the
root filesystem. Again, when I run chroot+initrd from the rescue image, it
mistakenly thinks that there are no VGs and no LVM is needed.
The workaround I used was to edit the 'mkinitrd' script to explicitly seed the
list of VGs that need to be enabled in the boot-time 'nash' script.
I think that this should be a command-line switch to mkinitrd, i.e.:
mkinitrd ... --force-lvm --with-vg=VolGroup00 ...
Otherwise, is there a preferred method to regenerate the ramdisk? Running
'mkinitrd' from rescue environment (outside of the chroot) doesn't work either.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Reboot a system with an LVM root using the rescue CD
2. chroot to the disk with
3. regenerate the ramdisk with
eval `rpm -q --queryformat "$qf" kernel-$kver`
4. check the contents of the ramdisk with
gzip -dc /boot/initrd-$kver.img | cpio -t
5. reboot (and witness the failure to find the root filesystem)
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