[linux-lvm] VGs not detected at startup

[linux-lvm] VGs not detected at startup

[Markus Wiedmer - FHBB]

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hi all,

I'm running lvm2.00.25 on kernel 2.6.9, but I have problems with
detecting the VGs.Immediately after bootup, vgscan returns: no volume
groups found, same for lvscan and pvscan. I have my root
partition on my Primary IDE-Drive (hda) and the VGs lie on the
serial-ATA-Drive (sda).

Now after I run fdisk on /dev/sda (just run it an quit again). all my
VGs mysteriously appear on the next vgscan.

I guess I'm missing something, but I can't see what. Does anyone know
this problem?

Thanks in advance

markus


-- 
Mit freundlichen Grüssen
Markus Wiedmer - FHBB


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Re: [linux-lvm] VGs not detected at startup

[David S.]

> 
> I'm running lvm2.00.25 on kernel 2.6.9, but I have problems with
> detecting the VGs.Immediately after bootup, vgscan returns: no volume
> groups found, same for lvscan and pvscan. I have my root
> partition on my Primary IDE-Drive (hda) and the VGs lie on the
> serial-ATA-Drive (sda).
> 
> Now after I run fdisk on /dev/sda (just run it an quit again). all my
> VGs mysteriously appear on the next vgscan.
> 
> I guess I'm missing something, but I can't see what. Does anyone know
> this problem?

Yes, I certainly know this problem.  I'm running LVM2 2.00.15 and device
mapper 1.00.17 on a 2.6.9 (x86) kernel.  'Vgscan' fails to find an vloumes
running from the system initialization script, but works fine a few seconds
(I'm guessing) later run from 'rc.local'.  I've tried a few things to "fix"
this, all to no effect.

David S.

> 
> Thanks in advance
> 
> markus
> 
> 
> -- 
> Mit freundlichen Gr?ssen
> Markus Wiedmer - FHBB
> 



> _______________________________________________
> 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/

Re: [linux-lvm] VGs not detected at startup

[Markus Wiedmer - FHBB]

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I'd be happy if this would work with me. Unfortunately a few seconds
(even an hour) will do nothing with my system. the VGs are still
unavailable.

I now found a work-around that seems to work so far. In the
LVM-Start-Script I just put "mount /dev/sda5 || true" before the vgscan. it
looks like after a mount-command the system suddenly finds the VG.
strange...

markus

DS> Yes, I certainly know this problem.  I'm running LVM2 2.00.15 and device
DS> mapper 1.00.17 on a 2.6.9 (x86) kernel.  'Vgscan' fails to find an vloumes
DS> running from the system initialization script, but works fine a few seconds
DS> (I'm guessing) later run from 'rc.local'.  I've tried a few things to "fix"
DS> this, all to no effect.

DS> David S.


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Re: [linux-lvm] VGs not detected at startup

[linux-lvm]

On Mon, Nov 08, 2004 at 02:46:31PM +0100, Markus Wiedmer - FHBB wrote:
> I now found a work-around that seems to work so far. In the
> LVM-Start-Script I just put "mount /dev/sda5 || true" before the vgscan. it
> looks like after a mount-command the system suddenly finds the VG.
> strange...

Apologies if this is something that's already been discussed (if so I missed it), and also
for saying something that you've almost definitely covered but......

Check to see if there's any autoloading of modules, or anything, going on as a result of the
mount/fdisk?

Also (instead of the mount) does a 'dd' work?  E.g. dd if=/dev/sda of=/dev/null bs=512
count=1?

That's going to be faster & probably less intrusive.

Graham

Re: [linux-lvm] VGs not detected at startup

[Markus Wiedmer - FHBB]

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llsdo> On Mon, Nov 08, 2004 at 02:46:31PM +0100, Markus Wiedmer - FHBB wrote:
>> I now found a work-around that seems to work so far. In the
>> LVM-Start-Script I just put "mount /dev/sda5 || true" before the vgscan. it
>> looks like after a mount-command the system suddenly finds the VG.
>> strange...

llsdo> Apologies if this is something that's already been
llsdo> discussed (if so I missed it), and also
llsdo> for saying something that you've almost definitely covered but......

llsdo> Check to see if there's any autoloading of modules, or
llsdo> anything, going on as a result of the
llsdo> mount/fdisk?

llsdo> Also (instead of the mount) does a 'dd' work?  E.g. dd
llsdo> if=/dev/sda of=/dev/null bs=512
llsdo> count=1?

llsdo> That's going to be faster & probably less intrusive.

llsdo> Graham

thanks a lot for your hint. it really was a module (sd_mod) that was
not loaded at boottime. everything works now like a charm

thanks

markus



-- 
Mit freundlichen Grüssen
Markus Wiedmer - FHBB
mailto:markus.wiedmer@stud.fhbb.ch


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[linux-lvm] VGs not detected at startup

[Diaz Rodriguez, Eduardo]

Hi, I�m running lvm 1.0.8, on kernel 2.4.30, but I have problems with
detecting the VGs. Immediately after bootup, vgscan returns: no volume
groups found I find very similar same problem that:

https://www.redhat.com/archives/linux-lvm/2004-November/msg00028.html
https://www.redhat.com/archives/linux-lvm/2004-November/msg00033.html


I am running lvm10 in debian linux with kernel 2.4.30

The problem are that boot process, (the rcS.d S27lvm) don't detect any vgs
but, after of some trys I must create a workarround and startup the script
after of

S35mountall.sh
cat S36lvm_ayuda
/sbin/vgscan
/sbin/vgchange -a y
/bin/mount �a

Yesterday the lvm script runs well but I think that the problem can be change
the kernel version (I change from 2.4.28 to 2.4.30)..

The problem was, I change the kernel version, after of boot, for accident I
write the checkroot.sh with checkfs.sh, a reboot, (many fails) I use a knoppix
for start the disk a recover from a very similar system (debian stable too
with lvm too).

After of this, lvm startup script never see any vgs but I exec the lvm script
too after of S35mountall.sh the script runs well.

I change some information of SCSI modules (for my usb-disk  �but this disk
don�t run in lvm only have ATA disk /dev/hdb1 and /dev/hdd1� ) for start as
modules. But I don�t remember that, because I think that this can bee easy.
The kernel version was compiling well. But after the reboot I see the problem.
I try exec vgscan �v, (putting in the scripts) but in boot process for any
information but nothing 

A very fanny night working at 4:00 AM :-)

If anypeople need more data don�t dude said me I sent the output of the commands

mounts
/dev/hda2 on / type ext3 (rw,errors=remount-ro)
/dev/hdc1 on /datos type reiserfs (rw)
/dev/hda3 on /backup/disco1 type reiserfs (rw)
proc on /proc type proc (rw)
/dev/vgdatos/vlortofotos on /datos_ortofotos type xfs (rw)

I any want's can contact with me in messenger at ediaz NOSPAM AT pk25 dot com


Any help is very appreciate 

P.D Sorry for my English, I am from spain