Bug 160444 - mkrootdev: label / not found with / in xfs - Kernel panic
Summary: mkrootdev: label / not found with / in xfs - Kernel panic
Alias: None
Product: Fedora
Classification: Fedora
Component: grub   
(Show other bugs)
Version: 4
Hardware: i386 Linux
Target Milestone: ---
Assignee: Peter Jones
QA Contact: Mike McLean
Depends On:
TreeView+ depends on / blocked
Reported: 2005-06-15 07:49 UTC by Laurent Blin
Modified: 2007-11-30 22:11 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2005-07-06 22:21:53 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Laurent Blin 2005-06-15 07:49:39 UTC
From Bugzilla Helper:
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Description of problem:
Here is the partition table used:
- 100M - /boot - ext3
- 10G - / - XFS
- 5G - VFAT (for win)
- Extended
- 5G - VFAT (for win)
- 1G - swat - swat
- 1G - /var - XFS
- 15G - /home - XFS

The installation goes without any problem. When the system reboot, the message appears, just after grub loader

mkrootdev: label / not found
with some xfs error message.
In rescue mode (linux xfs rescue), Fedora can't mount automatically / on /mnt/sysimage.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. install Fedora Core 4 from DVD x86 with xfs support (linus xfs)
2. format the disk as above (with grub on /dev/hda)
3. at the end of the install, the system reboots, than hags with kernel panic

Expected Results:  The system should have started.

Additional info:

Comment 1 Laurent Blin 2005-06-15 14:13:16 UTC
Here are the complete messages:
root (hd0,0)
 Filesystem type is ext2fs, partition type 0x83
kernel /vmlinuz-2.6.11-1.1369_FC4 ro root=LQBEL=/ rhgb quiet
  [Linux-bzImage, setup=0x1e00, size=0x18e473]
initrd /initrd-2.6.11-1.1369_FC4.img
  [Linux-initrd @ 0xfe22000,0x13ddde bytes]

Uncompressing Linux... Ok, booting the kernel.
Red Hat nash version 4.2.15 starting
mkrootdev: label / not found
mount: error 2 mounting xfs
ERROR opeing /dev/console!!!!: 2
error dup2'ing fd of 0 to 0
error dup2'ing fd of 0 to 1
error dup2'ing fd of 0 to 2
switchroot: mount failed: 22
Kernel panic - not syncing: Attempted to kill init!

Comment 2 Laurent Blin 2005-06-15 15:22:56 UTC
No pb when I use an EXT3 formatted / partition, and keep a XFS /home.
Is there a pb loading a / in XFS?

Comment 3 Furry Ball 2005-06-17 13:38:36 UTC
I can confirm this bug report. Just did "linux xfs" install with manually
created partitions. Had to use Kubuntu livecd (the only one handy) to xfs_admin
-L / /dev/sda3 (my root partition) to fix it. The installer doesn't label the
XFS root partition for some reason at all.

Comment 4 Gerald Britton 2005-06-18 22:10:34 UTC
I ran into this issue and the fix initially worked, but I ended up with grub
losing one of its stages and booting to just "GRUB " so I booted in rescue mode
prepared to do a grub-install to fix it, but that would segfault within grub.
After installing grub-debuginfo, I found that it was in xfs traversal code that
grub was segfaulting.  My guess is that grub-install won't work properly on a
mounted xfs filesystem (and since grub requires writing to the filesystem, this
may not be easily solvable).

I reinstalled with an ext3 /boot, and went over to a shell at the end of the
installation process to relabel the / filesystem, and looked at what it was
labeled initially and found that it had been labeled properly with "/" as the
filesystem label, however, the filesystem was inconsistant with the duplicate
superblocks (or xfs's equivalent) not agreeing.  I suspect anaconda may have
labeled the filesystem while it was mounted (which xfs does not seem to safely

This bug probably ought to be an anaconda bug.

Comment 5 Orion Poplawski 2005-06-21 17:31:42 UTC
Looks like the initial label created during install is bad somehow:

[root@coop01 ~]# mount -a
mount: special device LABEL=/scratch does not exist
[root@coop01 ~]# xfs_admin -l -f /dev/hda7
warning: AG 1 label differs
warning: AG 2 label differs
warning: AG 3 label differs
warning: AG 4 label differs
warning: AG 5 label differs
warning: AG 6 label differs
warning: AG 7 label differs
warning: AG 8 label differs
warning: AG 9 label differs
warning: AG 10 label differs
warning: AG 11 label differs
warning: AG 12 label differs
warning: AG 13 label differs
warning: AG 14 label differs
warning: AG 15 label differs
label = "/scratch"
[root@coop01 ~]# xfs_admin -L /scratch -f /dev/hda7
writing all SBs
new label = "/scratch"
[root@coop01 ~]# xfs_admin -l -f /dev/hda7
label = "/scratch"
[root@coop01 ~]# mount /scratch
[root@coop01 ~]#                 

Comment 6 Joseph Teichman 2005-06-23 00:47:23 UTC
Check if this relates to the bug that I had here with a deficient initial root
disk image, Bug # 161406

Comment 7 Peter Jones 2005-07-06 22:21:53 UTC
xfs is completely unsupported.

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