[linux-lvm] Problem deleteing PV's

[Subosu Guruju]

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Justin Booth wrote:

> Tried doing the "dd if of bs count" stuff and now I'm recieving a
> pvscan -- ERROR "pv_reaad(): PV identifier invalid" reading physical volumes
>
> any ideas ???
>
> Thanks,
>    Justin Both
> ----- Original Message -----
> From: "Kevin M Corry" <corryk at us.ibm.com>
> To: <linux-lvm at sistina.com>
> Cc: <jbooth at ccbill.com>
> Sent: Thursday, May 24, 2001 7:13 AM
> Subject: Re: [linux-lvm] Problem deleteing PV's
>
> > Justin,
> >
> > Do you have any active volumes using any space on /dev/sdb or /dev/sdc?
> > (You said below that you are trying to get rid of those entries to start
> > over)? When you tried recreating the partition table for those disks,
> > did you create everything with the same size/location? If so, then the
> > LVM metadata will still be in the same place that pvscan and vgscan
> > expect to find it. So, if you don't have any data on those disks to
> > worry about, you should be able to just clear out the metadata sectors.
> >
> > dd if=/dev/zero of=/dev/sdb1 bs=1k count=10
> > dd if=/dev/zero of=/dev/sdc1 bs=1k count=10
> > dd if=/dev/zero of=/dev/sdb bs=1k count=10
> > dd if=/dev/zero of=/dev/sdc bs=1k count=10
> >
> > There are actually 240+ sectors of metadata at the beginning of each
> > PV, but these commands should wipe away the information about the PVs
> > and VGs. After this you should repartition the disks again, run
> > pvcreate on the appropriate partitions, and run pvscan and vgscan.
> >
> > I hope I've understood your problem correctly. If you do in fact have
> > data on those disks, and vgscan/pvscan isn't finding the volumes, then
> > obviously don't run the above commands. :)
> >
> > Kevin
> >
> > > vgscan seems to only update /etc/lvmtab and /etc/lvmtagb.d
> > > a pvchange -x n /dev/sdxx
> > > results in a
> > > pvchange -- unable to find volume group "/dev/xxxx" (VG not active?)
> > > pvchange -- 0 physical volumes changed / 0 physical volumes already o.k.
> > >
> > > on all PV's
> > >
> > > > Have you tried a vgscan to see if there are VG's that you don't need?
> > What
> > > > about pvchange -x n /dev/sdxx?
> > > >
> > > >
> > > > > Hello,
> > > > >
> > > > >  I have a problem deleteing 4 PV's that I managed to create None of
> > the
> > > > > PV's are in a VG, and I can't figure out how to get rid of them
> > > > >
> > > > > when I do a pvscan It returns something like this:
> > > > >
> > > > > pvscan -- reading all physical volumes (this may take a while)
> > > > > pvscan -- inactive PV "/dev/sdb" is in no VG [12.16] MB
> > > > > pvscan -- inactive PV "/dev/sdb1" is in no VG [8.54] GB
> > > > > pvscan -- inactive PV "/dev/sdc" is in no VG [12.16] MB
> > > > > pvscan -- inactive PV "/dev/sdc1" is in no VG [8.54] GB
> > > > > pvscan -- total: 4 [17.11 GB] / in use 0 [0] / in no VG:  4 [17.11
> > GB]
> > > > >
> > > > >
> > > > > How do I get rid of these entries to start over again?
> > > > > I've tried deleteing the partition table and recreating them but a
> > > > > subsequent vgscan always brings them back into pvscan
> > > > >
> > > > >
> > > > >  Thanks much,
> > > > >       Justin Booth
> >
> > _______________________________________________
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> > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
> >
>
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