[linux-lvm] help needed

[narsimha.kulkarni at bt.com]

but Heinz is there anyway I can restore a vol group whose .conf file has
been deleted

-----Original Message-----
From: Heinz J . Mauelshagen [mailto:mauelshagen at sistina.com]
Sent: 02 June 2003 10:34
To: linux-lvm at sistina.com
Subject: Re: [linux-lvm] help needed


On Fri, May 30, 2003 at 09:42:00AM +0530, Sameer Halgatti wrote:
> hi narsimha,
> If u want to completely remove ur PV (i.e. if u want to lose ur data) then
> there is a very simple way to get rid of this problem. Just do
following....
> dd of=/dev/hda3                  ......hda3 becuse ur PV resides on that
> <enter approx 50 chars>
> <press cntrl+d>
> 

This avoids that you type something LVM might consider to be valid metadata
;)

dd if=/dev/zero of=/dev/hda3 bs=512

Regards,
Heinz    -- The LVM Guy --


> Of course it not the recommend solution, but it will solve ur problem :-)
> Actually ur VGDA data on the disk may be corrupted, that's why u r getting
> this error message.
> When u create a PV/VG, some data is written on the disk (on some initial
> disk blocks). So if u erase that by doing 'dd', then u can create fresh
> PV/VG using that disk.
> 
> 
> ----- Original Message -----
> From: <narsimha.kulkarni at bt.com>
> To: <linux-lvm at sistina.com>
> Sent: Thursday, May 29, 2003 8:03 PM
> Subject: [linux-lvm] help needed
> 
> 
> > hi following is the log of the commands....
> > i want to remove the volume group completely....
> > or i want to restore it....
> >
> > how do i do it
> >
> > vgscan -- reading all physical volumes (this may take a while...)
> > vgscan -- found active volume group "helena_vg"
> > vgscan -- ERROR "lv_read_all_lv(): number of LV" can't get data of
volume
> > group)
> > vgscan -- found active volume group "volg"
> > vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
> > vgscan -- WARNING: This program does not do a VGDA backup of your volume
> > groups
> >
> > vgremove -- ERROR: can't remove active volume group "helena_vg"
> >
> >
> > vgcfgrestore -- locking logical volume manager
> > vgcfgrestore -- restoring volume group "helena_vg" from
> > "/etc/lvmconf/helena_vg.conf"
> > vgcfgrestore -- checking existence of "/etc/lvmconf/helena_vg.conf"
> > vgcfgrestore -- "/etc/lvmconf/helena_vg.conf" doesn't exist
> > vgcfgrestore -- a backup for volume group helena_vg is not available
> >
> >
> > pvscan -- reading all physical volumes (this may take a while...)
> > pvscan -- inactive PV "/dev/hda3"  is associated to an unknown VG (run
> > vgscan)
> > pvscan -- ACTIVE   PV "/dev/hdb1" of VG "volg"      [31.48 GB / 31.48 GB
> > free]
> > pvscan -- total: 2 [39.08 GB] / in use: 2 [39.08 GB] / in no VG: 0 [0]
> >
> > pvchange -- locking logical volume manager
> > pvchange -- reading physical volume data /dev/hda3 from disk
> > pvchange -- checking physical volume "/dev/hda3" consistency
> > pvchange -- finding volume group of physical volume "/dev/hda3"
> > pvchange -- unable to find volume group of "/dev/hda3" (VG not active?)
> > pvchange -- unlocking logical volume manager
> > pvchange -- 0 physical volumes changed / 0 physical volumes already o.k.
> >
> > _______________________________________________
> > linux-lvm mailing list
> > linux-lvm at sistina.com
> > http://lists.sistina.com/mailman/listinfo/linux-lvm
> > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
> 
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm at sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

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

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=-

Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen at Sistina.com                           +49 2626 141200
                                                       FAX 924446
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