[linux-lvm] root fs on a LVM cause kernel panic

[Brent Harding]

I used the size before the initrd line, before, had the same issue.
Regarding lfs, what's the difference of 3.0, and the 1027 CVS version, plus
the 11-6 new one, can't get the book for 1027 CVS which I've completed
downloading from ftp last night. Is there any easy way to boot this thing
up if I have no separate partition?
At 05:19 PM 11/16/01 -0500, you wrote:
>I did further testing. Still not working. However, to make things clear I
will
>detail my environment.
>
>Hardware:
> IBM Netfinity 5000 with RAID
> 3 hot-swap disks 9 GB each
> 1 Iomega SCSI external 2GB JAZ drive
> 1 SCSI tape drive
>
>OS:
>  Started from RedHat 7.0
>  Kernel at 2.4.13
>  Many upgrades to rpms
>  gcc at 3.0.2
>  glibc 2.2.4
>  LVM support built-in
>  JFS support built-in
>  SCSI support built-in
>
>LVM:
>  1.0.1-rc4
>
>JFS:
>  1.0.8
>
>I am building a Linux From Scratch (LFS) system. For this purpose, I have
>created a VG (datavg). And a 1GB LV (lv_lfs). The LFS system has been built
>sucessfully. The old system is RedHat 7.0, with root fs on a non LVM ext2
>filesystem. I was able to create the LVM, the JFS filesystem and compile
>everything in this file system accordingly to instructions for LFS 3.0. No
>major modifications where required from LFS 3.0, except the latest
versions of
>packages were used.
>
>So, I have a fully functionnal RedHat system on plain ext2 filesystems
with LVM
>and JFS. The root fs is non-LVM ext2.
>
>I also have a LV which contains a new root fs which is a JFS filesystem. I
also
>tried with ext2 filesystem and it doesn't fix the problem.
>
>Now, the problem is:
>
>I want to boot with my LV JFS filesystem as root fs. I followed man page
>instructions for lvmcreate_initrd and created the initrd file. I checked the
>initrd and everything seems to be there.
>
>After a chat discussion with roadrunner on the openprojects lvm channel. We
>checked everything in the initrd, as well as the linuxrc file in it and it
>seems ok.
>
>While booting I am ending with a kernel panic message. The few last lines of
>the boot message are as follow:
>
>VFS: Cannot open root device "3a01" or 3a:01
>Please append a correct "root=" boot option
>Kernel panic: VFS: Unable to mount root fs on 3a:01
>
>I was suggested to try the following in the linuxrc file:
>
>I added the following line just before the /sbin/umount /proc line:
>
>/bin/echo "3A:01" > /proc/sys/kernel/real-root-dev
>
>The /bin/echo executable was added to the initrd. It didn't fix the problem.
>
>My lilo.conf file is as follow:
>
>image=/boot/lfskernel-2.4.13
>        initrd = /boot/initrd-lvm-2.4.13.gz
>        root = /dev/datavg/lv_lfs
>        label = lvmjfs
>        append = "ramdisk_size=8192"
>        read-only
>
>I also tested with ramdisk_size=X, where X is the size returned by the
>lvmcreate_initrd script for the ramdisk.
>
>Any help would be greatly appreciated.
>-- 
>
>================================
>Daniel Savard
>Internet: dsavard at videotron.ca
>================================
>
>
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>