Bug#378332: initramfs-tools: Symlink /dev/volgroup/root not recognized as lvm
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Hash: SHA1
Package: initramfs-tools
Version: 0.68b
Severity: normal
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My current setup: Root on LVM2, Kernel 2.6.12. I remember I had to
arm-twist the initrd-generation to get it going, way back.
The root fs is on LVM2:
andreas@kauz:/tmp$ LANG=C df /
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/e2vg/root 15482320 10793140 3902748 74% /
The twist in this setup: This root block device is a symbolic link:
andreas@kauz:/tmp$ ssh root@localhost LANG=C ls -l /dev/e2vg/root
lrwxrwxrwx 1 root root 21 Jul 15 11:35 /dev/e2vg/root -> /dev/mapper/e2vg-root
Today, I was trying to upgrade to kernel 2.6.16. The update itself went
smoothly enought, but I could not boot into the new kernel with the ram
disk that had been produced automatically. Appearently, the ram disk
generation scripts did not find out that /dev/e2vg/root lives on LVM2.
Here is the long story:
Looking at the ramdisk contents with
gunzip < /boot/initrd.img-2.6.16-2-k7 | cpio -ivt
I saw that not a whole lot of LVM things were included.
I tried this and that. In the end, I hacked update-initramfs itself,
adding "-r /dev/mapper/e2vg-root" to the mkinitramfs - call:
kauz:/usr/sbin# diff -u update-initramfs-ori update-initramfs
- --- update-initramfs-ori 2006-07-15 11:54:55.000000000 +0200
+++ update-initramfs 2006-07-15 11:58:37.000000000 +0200
@@ -67,7 +67,7 @@
if [ "${verbose}" = 1 ]; then
OPTS="-v $OPTS"
fi
- - if mkinitramfs $OPTS "${initramfs}" "${version}"; then
+ if mkinitramfs -r /dev/mapper/e2vg-root $OPTS "${initramfs}"
"${version}"; then
set_sha1
else
mkinitramfs_return="$?"
That produced a rd that did contain more of the LVM stuff.
I then changed the new kernel line in /boot/grub/menu.lst
from root=/dev/e2vg/root to root=/dev/mapper/e2vg-root
kernel /vmlinuz-2.6.16-2-k7 root=/dev/mapper/e2vg-root apm=off
Now, it all worked.
Regards, and thank you for providing fine software,
Andreas Krüger
- -- System Information:
Debian Release: testing/unstable
APT prefers testing
APT policy: (500, 'testing')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.12-1-k7
Locale: LANG=de_DE.ISO-8859-15@euro, LC_CTYPE=de_DE.ISO-8859-15@euro
(charmap=ISO-8859-15)
Versions of packages initramfs-tools depends on:
ii busybox 1:1.01-4 Tiny utilities for small and embed
ii cpio 2.6-12 GNU cpio -- a program to manage ar
ii klibc-utils 1.3.35-1 small statically-linked utilities
ii module-init-tools 3.2.2-3 tools for managing Linux kernel mo
ii udev 0.091-2 /dev/ and hotplug management daemo
initramfs-tools recommends no packages.
- -- no debconf information
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