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Re: [linux-lvm] Missing volume group



I updated my system to Beta 6 and everything works fine if I don't run
vgscan.  If I do run it, it wipes out the configuration data for my LV and
I have to do a restore to get it back.

Is this a bug in vgscan or is it a problem with my system?  If it is a
problem with my system, can someone let me know how to fix it?

Thanks for the help!

Jay

On Fri, 16 Mar 2001, Heinz J. Mauelshagen wrote:

>
> Jay, this is a problem related to a previous version of 0.9.1
>
> Please get the 0.9.1 Beta 6 tarball from www.sistina.com and follow the
> instructions in the contained INSTALL and PATCHES/README to update your
> LVM installation.
>
> You might like to remove the rpm package before in order to avoid the wrong
> LVM version in the rpm database.
>
> Until you have successfully update your LVM configuration, stay with the
> vgcfgrestore'd system and avoid running vgscan.
> In general vgscan is not needed anyway in case you *didn't* change your
> disk related hardware configuration.
>
>
> BTW: you can use e2fsadm(8) contained in the LVM distribution to resize
>      a LV *and* the contained ext2 filesystem in a single step.
>
>
> Regards,
> Heinz    -- The LVM Guy --
>
>
> On Thu, Mar 15, 2001 at 03:49:54PM -0500, Jay Sissom wrote:
> > Hello, I made some changes to my LVM setup on my box and was surprised to
> > find that my volume group was gone when I turned on the computer this
> > afternoon.  I don't know if this is a bug or if I did something wrong.
> > I'll try to list all the things that I did.  I would appreciate if someone
> > could let me know if I did something wrong or if I uncovered a bug.  I
> > would also appreciate if someone could tell me how I could correct this
> > problem.
> >
> > I have a RedHat 6.2 system with kernel 2.4.2.  I am using the lvm_mod
> > module directly from the 2.4.2 kernel.  I am using the lvm-0_9-1 rpm.
> >
> > I have a volume group called storage made up of two partitions /dev/hda5
> > and /dev/hdb1.  Here is information about them:
> >
> > [root js /root]# pvdisplay /dev/hda5
> > --- Physical volume ---
> > PV Name               /dev/hda5
> > VG Name               storage
> > PV Size               20.49 GB / NOT usable 2.84 MB [LVM: 140 KB]
> > PV#                   1
> > PV Status             available
> > Allocatable           yes (but full)
> > Cur LV                1
> > PE Size (KByte)       4096
> > Total PE              5246
> > Free PE               0
> > Allocated PE          5246
> > PV UUID               dsQm1p-6sTR-Czku-d1eV-Wj6Y-R4al-QWVjA2
> >
> > [root js /root]# pvdisplay /dev/hdb1
> > --- Physical volume ---
> > PV Name               /dev/hdb1
> > VG Name               storage
> > PV Size               28.62 GB / NOT usable 3.7 MB [LVM: 149 KB]
> > PV#                   2
> > PV Status             available
> > Allocatable           yes (but full)
> > Cur LV                1
> > PE Size (KByte)       4096
> > Total PE              7327
> > Free PE               0
> > Allocated PE          7327
> > PV UUID               bsAfjN-20M6-tBcd-Zw1s-cb1B-SIO3-XktC1l
> >
> > The physical volume /dev/hdb1 was 295 PE's smaller, so I extended it using
> > these commands:
> >
> >
> > umount /dev/storage/storage_lv
> >
> > lvextend -l+295 /dev/storage/storage_lv
> >
> > I then resized my ext2 file system:
> >
> > resize2fs /dev/storage/storage_lv
> >
> > mount /dev/storage/storage_lv /storage
> >
> > This all worked great.  When I turned off my computer, then turned it on
> > later, the volume group was gone.
> >
> > When vgscan was run, it gave this output:
> >
> > [root js /root]# vgscan
> > vgscan -- reading all physical volumes (this may take a while...)
> > vgscan -- no volume groups found
> >
> > I searched and found out about the vgcfgrestore command and I ran these
> > commands:
> >
> > [root js /root]# vgcfgrestore -n storage /dev/hda5
> > vgcfgrestore -- VGDA for "storage" successfully restored to physical
> > volume "/dev/hda5"
> >
> > [root js /root]# vgcfgrestore -n storage /dev/hdb1
> > vgcfgrestore -- VGDA for "storage" successfully restored to physical
> > volume "/dev/hdb1"
> >
> > [root js /root]# vgchange -ay
> > vgchange -- volume group "storage" successfully activated
> >
> > Now my volume is back, but I'm afraid it will disappear if I run vgscan
> > again.  I did the backup command to backup the configuration, but got
> > this:
> >
> > root js /root]# vgcfgbackup -v
> > vgcfgbackup -- finding all volume groups
> > vgcfgbackup -- volume group found: storage
> > vgcfgbackup -- locking logical volume manager
> > vgcfgbackup -- checking volume group name "storage"
> > vgcfgbackup -- checking existence of volume group "storage"
> > vgcfgbackup -- ERROR: volume group "storage" has an invalid number of
> > physical volumes
> > vgcfgbackup -- ERROR "vg_cfgbackup(): vg_check_exist" backing up volume
> > group "storage"
> >
> > Any help fixing this would be greatly appreciated.  This volume has 45.5GB
> > of data on it and I don't have a tape drive that big!  I could restore it
> > if necessary, but really REALLY don't want to! :)
> >
> > If this is a FAQ, please point me to the information.  I searched and
> > couldn't find anything.
> >
> > Thanks
> > Jay
> >
> >
> > _______________________________________________
> > linux-lvm mailing list
> > linux-lvm sistina com
> > http://lists.sistina.com/mailman/listinfo/linux-lvm
>
> *** Software bugs are stupid.
>     Nevertheless it needs not so stupid people to solve them ***
>
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>
> Heinz Mauelshagen                                 Sistina Software Inc.
> Senior Consultant/Developer                       Am Sonnenhang 11
>                                                   56242 Marienrachdorf
>                                                   Germany
> Mauelshagen Sistina com                           +49 2626 141200
>                                                        FAX 924446
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> _______________________________________________
> linux-lvm mailing list
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> http://lists.sistina.com/mailman/listinfo/linux-lvm
>



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