building LVM kernels for RH

[Net Llama!]

On Wed, 29 Jun 2005, James McDonald wrote:
> Net Llama! wrote:
>
> >Anyone here had any success building your own 2.6.x kernel from the
> >pristine kernel.org source on a RH system that is using LVM (either RHEL4
> >or FC3/4)?
> >
> >I've tried using an initrd and also compiling in support for LVM into the
> >2.6.12.1 kernel, and both times, the root filesystem can't be found on
> >bootup:
> >VFS: Cannot open root device "mapper/VolGroup00-LogVol00" or
> >unknown-block(0,0)
> >Please append a correct "root=" boot option
> >Kernel panic - not syncing: VFS: Unable to mount root fs on
> >unknown-block(0,0)
> >
> >Surely there has to be a way to do this without using RH's kernel?
> >
> >
> >
> tar -jxf /home/jamesm/downloads/kernel/linux-2.6.12.1.tar.bz2 # untar
> into /usr/src
> ln -sf linux-2.6.12.1/ linux # symlink so it is something abit short
> cd linux # change directorys
> make oldconfig # run make oldconfig
> make menuconfig # enable NTFS / CIFS etc
> make mrproper # wipe it all out because I didn't know mrproper deletes
> .config arrgh
> vi Makefile # put a jmcd on the end of the EXTRAVERSION value
> cp /boot/config-2.6.10-1.741_FC3 ./.config  # copy the running kernels
> config back
> make oldconfig # do the configuration again ... grumble
> make menuconfig
> make all # run make all (which incidently creates an initrd)
> make modules_install  # have to run this _before_ make install because
> make install relies on the modules directory being there already
> make install # install System.map vmlinuz initrd
> ls /boot/  # check it out
> vi /etc/grub.conf # edit to make the new kernel the default
> shutdown -r now # reboot
> ps -ef # have a look at what's running hmm seems alright
> lsmod # check to see if the modules I need are loaded
> pptpconfig # run one of the critical programs I need for work which auto
> creates a mpppe module. yup it's gold.
> history  > kernel_compile.txt
>
> Mine worked straight away I have two ATA HDD's which the linux root
> spans across
>
> Disk /dev/hda: 20.4 GB, 20485785600 bytes
> 255 heads, 63 sectors/track, 2490 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
>    Device Boot      Start         End      Blocks   Id  System
> /dev/hda1   *           1          13      104391   83  Linux
> /dev/hda2              14        2490    19896502+  8e  Linux LVM
>
> Disk /dev/hdb: 30.0 GB, 30020272128 bytes
> 255 heads, 63 sectors/track, 3649 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
>    Device Boot      Start         End      Blocks   Id  System
> /dev/hdb1   *           1        1020     8193118+   7  HPFS/NTFS
> /dev/hdb2            1021        3649    21117442+  8e  Linux LVM

This isn't RH, is it?  Cause RH uses an actual LVM block device, rather
than /dev/hdb2, etc.

BTW, I did what you mentioned above.

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lonni J Friedman                        netllama at linux-sxs.org
LlamaLand				http://netllama.linux-sxs.org