[Gllug] LVM Problem

[Peter Childs]

Hmm thinking about this further how about if I vgexport the volume
group and then reimport it ie vgimport. Either way it looks like I'm
going to need to reboot it to do it and I would like to know all the
ins and outs before I go ahead as once its down time is extremly
limited. If I can do it with out having to bring the machine down it
would be even better.
This is growing my opion that LVM is just another thing to go wrong.

Peter Childs

On 19/10/05, Peter Childs <peterachilds at gmail.com> wrote:
> On 19/10/05, Bruce Richardson <itsbruce at uklinux.net> wrote:
> > On Tue, Oct 18, 2005 at 09:09:56PM +0100, Peter wrote:
> > > On the topic of LVM I'm trying to use some spare space on my LVM (I've
> > > got about 84GB unused currently) But unforinally lvcreate does not
> > > work.
> > >
> > > sudo lvcreate -L 80G -n company main
> > > Password:
> > > lvcreate -- ERROR "pv_status_all_pv_of_vg(): no PV" getting status of
> > > volume group "main" from kernel
> > >
> > > I think its because lvm thinks I'm using devfs which I'm not.
> >
> > Why do you think that?  What is telling you that?  Also, what do pvscan
> > and vgscan tell you?
> >
> > If you do not use devfs, do you use udev?
> >
> >
> > > So I'm
> > > guessing I need to reboot with devfs switched on and then use lvcreate
> >
> > Even if that worked, and I can see how it might, it would just be a
> > workaround on what sounds like a broken system and the best response is
> > to fix the breakages.
> >
> > > I can't just mount devfs as the error messages get even more silly!
> > > (Like telling me I'm using the wrong version of lvm)
> > > Anyway now where did I leave that error message....
> > > Hense probably the main reason for not using LVM is that not using it
> > > keeps things simple and  more fault tollerant.
> >
> > LVM really does not add much complexity and actually makes maintenance
> > considerably easier if you use it properly.
> >
> Looks like the using it properly is the difficult bit. I see it as
> just another thing to go wrong! Oh I got my solution by doing some web
> searches for people with simular problems! (good old google)
>
> If you've got a better idea I'd love to hear it because rebooting the
> server is not really an option currently!
>
> sudo pvscan
> Password:
> pvscan -- reading all physical volumes (this may take a while...)
> pvscan -- inactive PV "/dev/sda2" of VG "main" [228 GB / 24 GB free]
> pvscan -- total: 1 [228.03 GB] / in use: 1 [228.03 GB] / in no VG: 0 [0]
>
> sudo vgscan
> vgscan -- reading all physical volumes (this may take a while...)
> vgscan -- found active volume group "main"
> vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
> vgscan -- WARNING: This program does not do a VGDA backup of your volume group
>
> sudo vgdisplay
> --- Volume group ---
> VG Name               main
> VG Access             read/write
> VG Status             available/resizable
> VG #                  0
> MAX LV                256
> Cur LV                5
> Open LV               5
> MAX LV Size           2 TB
> Max PV                256
> Cur PV                1
> Act PV                1
> VG Size               228 GB
> PE Size               32 MB
> Total PE              7296
> Alloc PE / Size       4608 / 144 GB
> Free  PE / Size       2688 / 84 GB
> VG UUID               JGWnlD-H8PQ-WU7R-HH1G-yU69-0maE-QGZvsJ
>
> Peter Childs
>
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