[linux-lvm] Ubuntu distro with lvm2, raid 1, not booting anymore.

[linux-lvm] Ubuntu distro with lvm2, raid 1, not booting anymore.

[Maciej Słojewski]

Welcome!

I have the serious problem with booting of my machine. It is run on 
Ubuntu distro (5.10), with lvm2 raid 1 on two identical sata hard disks. 
Lilo bootloader. The problem is that after small change in lilo.conf and 
running /sbin/lilo my system is no longer bootable. I see 'kernel panic' 
message. When I try to run lilo again (from Ubuntu Live! cd) I see some 
comments somehow related to dev-mapper:

Warning: /proc/partitions does not match /dev directory structure
Name change: /dev/cloop 0 -> /tmp/dev.0
(...)
Fatal: is_primary: Not a valid device

I don't know how to handle these problesm. Looking over net didn't help 
me. So I decided to write on this mailing list. If you can help me anyway,
even just redirecting me to appropriate group / chanel where people will 
help me to deal with these problem, I will appreciate it. Thanks
in advance!

My lilo version is 22.6.1
dev-mapper version is 1.11.0
kernel (default of Ubuntu 5.10): 2.6.12-10-386

I will quote the kernel messages:
RAMDISK: ran out of compressed data
invalid compressed format (err=1)
VFS: Cannot open root device "fd02" or unknow-block (253,2)
Please append a correct "root=" root option
Kernel panic - not syncing: VFS: Unable to mount root fs
unknown-block (253,2)

That is all. It looks like kernel is doing some hardware recognition and 
then stops.

Kind regards,
Maciej Slojewski (mslonik)

Re: [linux-lvm] Ubuntu distro with lvm2, raid 1, not booting anymore.

[Luca Berra]

On Thu, Feb 02, 2006 at 07:51:33PM +0100, Maciej S?ojewski wrote:
>Welcome!
>
>I have the serious problem with booting of my machine. It is run on 
>Ubuntu distro (5.10), with lvm2 raid 1 on two identical sata hard disks. 
>Lilo bootloader. The problem is that after small change in lilo.conf and 
>running /sbin/lilo my system is no longer bootable. I see 'kernel panic' 
>message. When I try to run lilo again (from Ubuntu Live! cd) I see some 
>comments somehow related to dev-mapper:
>
>Warning: /proc/partitions does not match /dev directory structure
>Name change: /dev/cloop 0 -> /tmp/dev.0
>(...)
>Fatal: is_primary: Not a valid device

what is exactly that you are doing to reinstall lilo?
i don't use ubuntu, but generally:
you should mount your original root fs on, say, /root
mount --bind /dev /root/dev
mount --bind /proc /root/proc
mount --bind /sys /root/sys
chroot /root /sbin/lilo


>
>I will quote the kernel messages:
>RAMDISK: ran out of compressed data
>invalid compressed format (err=1)
looks like your initrd is hosed
check that lilo is pointing to a correct initrd and/or regenerate
initrd. (no i don't remember the debian way to regenerate initrd)

L.


-- 
Luca Berra -- bluca@comedia.it
        Communication Media & Services S.r.l.
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Re: [linux-lvm] Ubuntu distro with lvm2, raid 1, not booting anymore.

[Maciej Słojewski]

Luca Berra wrote:

> On Thu, Feb 02, 2006 at 07:51:33PM +0100, Maciej S?ojewski wrote:
>
>> Welcome!
>>
>> I have the serious problem with booting of my machine. It is run on 
>> Ubuntu distro (5.10), with lvm2 raid 1 on two identical sata hard 
>> disks. Lilo bootloader. The problem is that after small change in 
>> lilo.conf and running /sbin/lilo my system is no longer bootable. I 
>> see 'kernel panic' message. When I try to run lilo again (from Ubuntu 
>> Live! cd) I see some comments somehow related to dev-mapper:
>>
>
> what is exactly that you are doing to reinstall lilo?
> i don't use ubuntu, but generally:
> you should mount your original root fs on, say, /root
> mount --bind /dev /root/dev
> mount --bind /proc /root/proc
> mount --bind /sys /root/sys
> chroot /root /sbin/lilo

Dear Luka,

Thanks a lot for your answer and a clue. Unfortunately it doesn't help 
me :-(

Here you go, what am I doing after system start:

* Ubuntu Live! CD is booting, I hit <ener> key
* system is starting in graphical mode
* I open terminal window

# sudo su
# cd /mnt
# mkdir dev proc boot sys
# mount -v -t ext3 /dev/PV/boot /mnt/boot
dev/mapper/PV-boot on /mnt/boot type ext3 (rw)
# mount -v -t ext3 /dev/PV/root /mnt/root
dev/mapper/PV-root on /mnt/root type ext3 (rw)
#mount -v -t proc none /mnt/proc
none on /mnt/proc type proc (rw)
#mount -v -t sysfs none /mnt/sys
none on /mnt/sys type sysfs (rw)

#chroot /mnt /bin/bash
#lilo

Warning: '/proc/partitions' does not match '/dev' directory structure
Name changes '/dev/cloop0' -> '/tmp/dev.0'
Warning: '/dev' directory structure is incomplete; device (240,0) is missing
Warning: '/dev' directory structure is incomplete; device (254,0) is missing
Warning: '/dev' directory structure is incomplete; device (254,1) is missing
Warning: '/dev' directory structure is incomplete; device (254,2) is missing
Warning: '/dev' directory structure is incomplete; device (254,3) is missing
Warning: '/dev' directory structure is incomplete; device (254,4) is missing
Warning: '/dev' directory structure is incomplete; device (254,5) is missing
Warning: '/dev' directory structure is incomplete; device (254,6) is missing
Fatal: is_primary: Not a valid device 0xFE07

:-((( Please help me, what can I do now?
I have regenerated initrd, (update-initrd command). It did not help too.

Kind regards,
Maciej (mslonik)