[linux-lvm] Kernel panic - not syncing: No init found. Try passing init= option to,kernel

[linux-lvm] Kernel panic - not syncing: No init found. Try passing init= option to,kernel

[Raquel Real López]

Hello!

I have got  a RedHat 3 Update 6 system. The system has a hard disk It's 
partitioned like:
/dev/sda1 /boot Linux
/dev/sda2 LVM
    /dev/disk1Vol/rootvol /
    /dev/disk1Vol/export /export
    /dev/disk1Vol/softw /softw

The system was booted and it didn't start again.
The message was:
vgscan  ERROR "vg_read_with_pv_and_lv(): current PV" can't get data of 
volume group "disk1Vol" from physical volume

And then:

Kernel panic - not syncing: No init found. Try passing init= option to
kernel.

If I boot with a rescue disk and I type "lvdisplay", LV UUID is 
"000000-00....".

How can I recover the system?

Thanks in advance
I

Re: [linux-lvm] Kernel panic - not syncing: No init found. Try passing init= option to,kernel

[Heinz Mauelshagen]

On Mon, May 19, 2008 at 10:09:51AM +0200, Raquel Real L�pez wrote:
>
> Hello!
>
> I have got  a RedHat 3 Update 6 system. The system has a hard disk It's 
> partitioned like:
> /dev/sda1 /boot Linux
> /dev/sda2 LVM
>    /dev/disk1Vol/rootvol /
>    /dev/disk1Vol/export /export
>    /dev/disk1Vol/softw /softw
>
> The system was booted and it didn't start again.
> The message was:
> vgscan  ERROR "vg_read_with_pv_and_lv(): current PV" can't get data of 
> volume group "disk1Vol" from physical volume

Any indication that the disk turned bad from before ?

Looks like it either did and your single copy of the LVM1 metadata
went south
-or-
the metadata got corrupted somehow differently.

>
> And then:
>
> Kernel panic - not syncing: No init found. Try passing init= option to
> kernel.

Expected kernel behaviour w/o root fs.

>
> If I boot with a rescue disk and I type "lvdisplay", LV UUID is 
> "000000-00....".

LVM1 didn't have UUIDs on LVs, that's why.
Can you access the VG from the rescue disk and access your data alright ?

>
> How can I recover the system?

If the disk's intact, and you better prove that by running access tests
on /dev/sda from your rescue disk, you have to restore the metadata from
backup using pvcreate+vgcfgrestore. See man vgcfgrestore for details.

>
> Thanks in advance
> I
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Heinz Mauelshagen                                 Red Hat GmbH
Consulting Development Engineer                   Am Sonnenhang 11
Storage Development                               56242 Marienrachdorf
                                                  Germany
Mauelshagen@RedHat.com                            PHONE +49  171 7803392
                                                  FAX   +49 2626 924446
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Re: [linux-lvm] Kernel panic - not syncing: No init found. Try passing init= option to,kernel

[Raquel Real López]

Hello!

Thank you for your reply

Heinz Mauelshagen escribi�:
>
> Any indication that the disk turned bad from before ?
>   
Reboot and then the system crashed
> Looks like it either did and your single copy of the LVM1 metadata
> went south
> -or-
> the metadata got corrupted somehow differently.
>
>   
>> And then:
>>
>> Kernel panic - not syncing: No init found. Try passing init= option to
>> kernel.
>>     
>
> Expected kernel behaviour w/o root fs.
>
>   
>> If I boot with a rescue disk and I type "lvdisplay", LV UUID is 
>> "000000-00....".
>>     
>
> LVM1 didn't have UUIDs on LVs, that's why.
> Can you access the VG from the rescue disk and access your data alright ?
>   
Yes, I can access.

>> How can I recover the system?
>>     
>
> If the disk's intact, and you better prove that by running access tests
> on /dev/sda from your rescue disk, you have to restore the metadata from
> backup using pvcreate+vgcfgrestore. See man vgcfgrestore for details.
>
>   
If I type "pvcreate /dev/sda2", can I lose the data?

Thanks

Re: [linux-lvm] Kernel panic - not syncing: No init found. Try passing init= option to,kernel

[Raquel Real López]

Hello and thank Heinz for your help!

I could restore the system.
That's what I did it:
- It was booted with a rescue disk
- It was mounted the system files.
- Then, chroot /mnt/sysimage
- vgreduce /dev/sdb1 to remove the disk from the volume group.
- Finally, shutdown -r now

But I'm not sure how remove the disk from pvscan:
pvscan -- reading all physical volumes (this may take a while...)
pvscan -- ACTIVE   PV "/dev/sda2" of VG "disk1Vol" [68.13 GB / 0 free]
pvscan -- inactive PV "/dev/sdb1" is in no VG  [62.43 MB]
pvscan -- total: 2 [68.20 GB] / in use: 1 [68.14 GB] / in no VG: 1 
[62.43 MB]


Now it's inactive. Can I remove totally?

Thanks