Thanks all for the help.
I've tried setting the grub line to
linux /boot/vmlinux-2.6.32.8 root=/dev/sdb1
linux /boot/vmlinux-2.6.32.8 root=/dev/sda1
linux /boot/vmlinux-2.6.32.8 root=/dev/hdb1
linux /boot/vmlinux-2.6.32.8 root=/dev/hda1
So it's not an issue of the system seeing the wrong partition. Am I missing
something in the kernel for reading the filesystem?
Thanks,
Chris
On Tue, Aug 10, 2010 at 9:03 AM, Chris Parsons <chrisparson...@gmail.com>wrote:
> Hi all,
>
> I've completed most of LFS 6.6. I'm on Chapter 8 of the final stages of
> trying to get it to boot independently of the host Linux system. It keeps
> stopping with a kernel panic message and/or "error: invalid signature"
> depending on how I try to launch it. Here are some background details.
>
> - Periodically do LFS builds primarily to maintain and increase my Linux
> knowledge.
> - Using VMware Workstation 7.1
> - Installed Ubuntu 10.4 onto one virtual disk. System sees this disk as
> /dev/sda
> - Ran through LFS 6.6.
> - Added another Vmware disk for LFS. Ubuntu and LFS see this disk as
> /dev/sdb. All of the LFS is on this disk. (sdb1)
> - Added another VMware disk for LFS swap. Ubuntu and LFS see this disk as
> /dev/sdc
> - Aside from some minor build issues, build went ok.
>
> Unfortunately, I'm up against my knowledge of GRUB and Linux kernel. Here
> is how I'm executing the final steps:
>
> # Begin /etc/fstab
>
> # file system mount-point type options dump fsck
> # order
> /dev/sdb1 / ext3 defaults 1 1
> /dev/sdc1 swap swap pri=1 0 0
> proc /proc proc defaults 0 0
> sysfs /sys sysfs defaults 0 0
> devpts /dev/pts devpts gid=4,mode=620 0 0
> tmpfs /dev/shm tmpfs defaults 0 0
> # End /etc/fstab
>
>
> Executed 8.3 steps. The file set is as follows:
> root:/boot# more /boot/
> System.map-2.6.32.8 config-2.6.32.8 vmlinux-2.6.32.8
>
> root:/boot# grub-mkdevicemap --device-map=device.map
> root:/boot# cat device.map
> (fd0) /dev/fd0
> (hd0) /dev/sda
> (hd1) /dev/sdb
> (hd2) /dev/sdc
>
> root:/boot# grub-install --grub-setup=/bin/true /dev/sdb
> Installation finished. No error reported.
> This is the contents of the device map /boot/grub/device.map.
> Check if this is correct or not. If any of the lines is incorrect,
> fix it and re-run the script `grub-install'.
>
> (fd0) /dev/fd0
> (hd0) /dev/sda
> (hd1) /dev/sdb
> (hd2) /dev/sdc
>
> root:/boot# grub-mkconfig -o /boot/grub/grub.cfg
> Generating grub.cfg ...
> Found linux image: /boot/vmlinux-2.6.32.8
> done
>
> ..snip..
> menuentry "GNU/Linux, with Linux 2.6.32.8" {
> insmod ext2
> set root=(hd1,1)
> search --no-floppy --fs-uuid --set b9103db0-c62f-4977-837b-e78ca7c85780
> linux /boot/vmlinux-2.6.32.8 root=/dev/sdb1 ro
> }
> ..snip..
>
> root:/boot# grub-setup /dev/sdb
>
>
> At this point, my understanding is that the system should be in a state to
> boot. In order to get Ubuntu to boot it, I'm altering the GRUB2 config file
> on Ubuntu and adding a chain loader as follows:
>
> ### BEGIN /etc/grub.d/40_custom ###
> # This file provides an easy way to add custom menu entries. Simply type
> the
> # menu entries you want to add after this comment. Be careful not to
> change
> # the 'exec tail' line above.
> menuentry "LFS" {
> set root=(hd1,1)
> chainloader +1
> }
> ### END /etc/grub.d/40_custom ###
>
> When I reboot to the Ubuntu GRUB2 loader screen and choose the LFS entry,
> the only error message displayed is "error: invalid signature press any key
> to continue.."
>
> If I then try to manually enter commands as follows, I get:
> grub> root (hd1,1)
> grub> linux /boot/vmlinux-2.6.32.8 root=/dev/sdb1
> grub> boot
>
> VFS: Unable to mount root fs via NFS, trying floppy.
> VFS: Cannot open root device "sdb1" or unknown-block(2,0)
> Please append a correct "root=" boot option; here are the available
> partitions:
> 0b00 1048575 sr0 driver: sr
> Kernel panic - not syncing: VFS: Unable to mount root fs on
> unknown-block(2,0?)
>
> Could someone point me in the right direction?
>
> Thanks for the help,
> Chris
>
>
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