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



Does Lilo support JFS? I use XFS instead of EXT2 but for that I needed to
patch lilo with XFS support.


Joost van der Locht
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> -----Oorspronkelijk bericht-----
> Van: linux-lvm-admin sistina com
> [mailto:linux-lvm-admin sistina com]Namens Daniel Savard
> Verzonden: zaterdag 17 november 2001 5:10
> Aan: Andreas Dilger
> CC: linux-lvm sistina com
> Onderwerp: Re: [linux-lvm] root fs on a LVM cause kernel panic
>
>
> Number 2 can be dropped. I re-ran lilo after changing the configuration.
>
> I just tested number 1, this time I am getting an error while
> trying to access
> /dev/ram0 which doesn't exist at this time in the execution sequence.
>
> The error message was as follow:
>
> NET4: Unix domain sockets 1.0/SMP for Linux NET4.0
> ds: no socket drivers loaded!
> request_module [block-major-1]: Root fs not mounted
> VFS: Cannot open root device "100" or 01:00
> Please append a correct "root=" boot option
> Kernel panic: VFS: Unable to mount root fs on 01:00
>
> >From this, I decided to check my kernel setup and discovered
> (silly me) I made
> a newbie error. The initrd support at boot time was not enabled
> in my kernel.
>
> So, thanks for help to everyone and particularily to roadrunner on the IRC
> channel who give much time on-line to help me and Andreas Dilger.
>
> My system is not fully functionnal yet, however, the LVM problem
> is solved.
>
> My target configuration is a Linux From Scratch system, mostly
> based on V 3.0
> instructions. But, instead of gcc 2.95.3 it is based on gcc 3.0.2
> and glibc
> 2.2.4 with kernel 2.4.13. My remaining errors are with the initialization
> scripts for the LFS, this is off topic on this dist list.
>
> So, if I can help in the future with testing. Let me know.
>
>  --
>
> ================================
> Daniel Savard
> Internet: dsavard videotron ca
> ================================
>
> Le ven, 16 nov 2001, Andreas Dilger a écrit :
> > On Nov 16, 2001  17:19 -0500, Daniel Savard wrote:
> > > 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
> >
> > Hmm, you only get that message when the initial boot is done, so two
> > possibilities (I'm not an initrd guru, mind you):
> >
> > 1) you need to change the root= line in your lilo.conf to say
> "root=/dev/ram0"
> >    so that it will boot into the initrd.  Then do the
> real-root-dev trick
> >    (or try pivot_root if running a 2.4 kernel) after configuring the LVM
> >    stuff via vgscan; vgchange -a y.
> >
> > 2) You didn't re-run lilo after changing lilo.conf (yes, you
> probably did,
> >    but you can never tell from here, and always safe to ask).
> >
> > > I also tested with ramdisk_size=X, where X is the size returned by the
> > > lvmcreate_initrd script for the ramdisk.
> >
> > As long as this is larger than the size of the uncompressed ramdisk, you
> > should be OK.
> >
> > Cheers, Andreas
> > --
> > Andreas Dilger
> > http://sourceforge.net/projects/ext2resize/
> > http://www-mddsp.enel.ucalgary.ca/People/adilger/
>
>
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> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
>




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