Bug 202343 – sys-kernel/genkernel-3.4.9_pre6 generated initrd missing /dev node for booting from software raid

• Status: RESOLVED FIXED
• Product: Gentoo Hosted Projects

[Description Tom Lanyon 2007-12-14 23:36:01 UTC]

A system with software RAID boot (/dev/md0) and root (/dev/md1) partitions fails to boot. The initrd generated by genkernel creates the /dev/md0 node but not /dev/md1. LVM is also involved, sitting atop /dev/md1.


Reproducible: Always

Steps to Reproduce:
1. Install Gentoo Linux onto software RAID with LVM root
2. Generate initrd with genkernel
3. Instruct grub to boot with initrd


Actual Results:  
System doesn't boot; produces error message:
>>Activating Device-Mapper RAID(s)
No RAID disks
>>Determining root device...
!! Block device /dev/vg/root is not a valid root device
!! The root block device is unspecified or not detected.

To fix manually, I enter 'shell' a the prompt and then:
# mknod /dev/md1 b 9 1
# mdadm --assemble --scan
# vgscan && vgchange -a y
# exit
Then enter /dev/vg/root at the "boot:" prompt.


Expected Results:  
Initrd should create /dev/md1, assemble RAID devices, detect LVM VG, mount root partition and boot cleanly.

== relevant packages ==
sys-boot/grub-0.97-r3
sys-kernel/genkernel-3.4.9_pre6
sys-kernel/gentoo-sources-2.6.23-r3

== grub config==
kernel /boot/kernel-2.6.23-gentoo-r3 udev dodmraid dolvm2 lvmraid=/dev/md0,/dev/md1 root=/dev/ram0 real_root=/dev/vg/root init=/linuxrc
initrd /boot/initramfs-genkernel-x86_64-2.6.23-gentoo-r3

== emerge --info ==
Portage 2.1.3.19 (default-linux/amd64/2007.0, gcc-4.1.2, glibc-2.6.1-r0, 2.6.23-gentoo-r3 x86_64)
=================================================================
System uname: 2.6.23-gentoo-r3 x86_64 Intel(R) Core(TM)2 Duo CPU E6850 @ 3.00GHz
Timestamp of tree: Fri, 14 Dec 2007 22:46:01 +0000
app-shells/bash:     3.2_p17
dev-lang/python:     2.4.4-r6
dev-python/pycrypto: 2.0.1-r6
sys-apps/baselayout: 1.12.9-r2
sys-apps/sandbox:    1.2.18.1-r2
sys-devel/autoconf:  2.13, 2.61-r1
sys-devel/automake:  1.7.9-r1, 1.9.6-r2, 1.10
sys-devel/binutils:  2.18-r1
sys-devel/gcc-config: 1.3.16
sys-devel/libtool:   1.5.24
virtual/os-headers:  2.6.22-r2
ACCEPT_KEYWORDS="amd64"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=nocona -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /home/mythtv/ /usr/share/X11/xkb"
CONFIG_PROTECT_MASK="/etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/revdep-rebuild /etc/terminfo /etc/udev/rules.d"
CXXFLAGS="-march=nocona -O2 -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="distlocks metadata-transfer sandbox sfperms strict unmerge-orphans userfetch"
GENTOO_MIRRORS="ftp://mirror.internode.on.net/pub/gentoo"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --delete-after --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --filter=H_**/files/digest-*"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/portage"
SYNC="rsync://ftp.swin.edu.au/gentoo-portage"
USE="X aac acl acpi alsa amd64 berkdb bitmap-fonts cli cracklib crypt cups dri fortran gdbm gpm gtk iconv isdnlog lirc midi mmx mplayer mudflap ncurses nls nptl nptlonly nvidia openmp pam pcre perl pppd python readline reflection session spl sse sse2 ssl tcpd truetype truetype-fonts type1-fonts unicode xorg zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" ELIBC="glibc" INPUT_DEVICES="keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" USERLAND="GNU" VIDEO_CARDS="nvidia nv vesa"
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS, LINGUAS, MAKEOPTS, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

[Comment 1 Andrew Gaffney (RETIRED) 2007-12-15 02:08:38 UTC]

Please try the latest version in the tree (3.4.9_pre11)

[Comment 2 Tom Lanyon 2007-12-15 08:23:02 UTC]

(In reply to comment #1)
> Please try the latest version in the tree (3.4.9_pre11)
> 


pre11 is working fine, thanks. Can this be bumped out of ~amd64?

[Comment 3 Andrew Gaffney (RETIRED) 2007-12-15 16:07:22 UTC]

When we deem that it's ready, it will be