[linux-lvm] Recovering a volume after OS upgrade (lost /etc/lvm*)

[linux-lvm] Recovering a volume after OS upgrade (lost /etc/lvm*)

[Lars Kellogg-Stedman]

I just upgraded a system to RedHat 7.2 (+ XFS from SGI) (lvm-1.0.1RC4),
and I'm trying to mount a LVM-based logical volume created using LVM
0.9mumble.  The volume group consisted of a single PV on opt of a
software RAID5 device.

pvscan says:

  pvscan -- reading all physical volumes (this may take a while...)
  pvscan -- WARNING: physical volume "/dev/sda" belongs to a meta
device
  pvscan -- inactive PV "/dev/md0"  is associated to an unknown VG (run
vgscan)
  pvscan -- total: 2 [8.48 GB] / in use: 2 [8.48 GB] / in no VG: 0 [0]

And pvdisplay says:

  --- Physical volume ---
  PV Name               /dev/md0
  VG Name               vg0
  PV Size               8.48 GB / NOT usable 2.75 MB [LVM: 129.00 KB]
  PV#                   1
  PV Status             NOT available
  Allocatable           yes (but full)
  Cur LV                1
  PE Size (KByte)       4096
  Total PE              2169
  Free PE               0
  Allocated PE          2169
  PV UUID               HHv1Tm-79Hx-uk4m-caqb-QUA5-8WGF-0yUe4Q

Which looks great.  But I can't for the life of me figure out how to
turn this back into a valid volume group.  Vgscan doesn't pick up this
device:

  vgscan -- reading all physical volumes (this may take a while...)
  vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
  vgscan -- WARNING: This program does not do a VGDA backup of your
volume group

How do I recover this volume?

Thanks,

-- Lars


=====
lars@larsshack.org

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Re: [linux-lvm] Recovering a volume after OS upgrade (lost /etc/lvm*)

[Luca Berra]

On Sun, Nov 18, 2001 at 07:22:07PM -0800, Lars Kellogg-Stedman wrote:
> I just upgraded a system to RedHat 7.2 (+ XFS from SGI) (lvm-1.0.1RC4),
> and I'm trying to mount a LVM-based logical volume created using LVM
> 0.9mumble.  The volume group consisted of a single PV on opt of a
> software RAID5 device.
> 
can you please provide the output of lvmdiskscan?

L.

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Re: [linux-lvm] Recovering a volume after OS upgrade (lost /etc/lvm*)

[Andreas Dilger]

On Nov 18, 2001  19:22 -0800, Lars Kellogg-Stedman wrote:
> I just upgraded a system to RedHat 7.2 (+ XFS from SGI) (lvm-1.0.1RC4),
> and I'm trying to mount a LVM-based logical volume created using LVM
> 0.9mumble.  The volume group consisted of a single PV on opt of a
> software RAID5 device.
> 
> pvscan says:
> 
>   pvscan -- reading all physical volumes (this may take a while...)
>   pvscan -- WARNING: physical volume "/dev/sda" belongs to a meta
> device
>   pvscan -- inactive PV "/dev/md0"  is associated to an unknown VG (run
> vgscan)
>   pvscan -- total: 2 [8.48 GB] / in use: 2 [8.48 GB] / in no VG: 0 [0]
> 
> And pvdisplay says:
> 
>   --- Physical volume ---
>   PV Name               /dev/md0
>   VG Name               vg0
>   PV Size               8.48 GB / NOT usable 2.75 MB [LVM: 129.00 KB]
>   PV#                   1
>   PV Status             NOT available
>   Allocatable           yes (but full)
>   Cur LV                1
>   PE Size (KByte)       4096
>   Total PE              2169
>   Free PE               0
>   Allocated PE          2169
>   PV UUID               HHv1Tm-79Hx-uk4m-caqb-QUA5-8WGF-0yUe4Q
> 
> Which looks great.  But I can't for the life of me figure out how to
> turn this back into a valid volume group.  Vgscan doesn't pick up this
> device:
> 
>   vgscan -- reading all physical volumes (this may take a while...)
>   vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
>   vgscan -- WARNING: This program does not do a VGDA backup of your
> volume group

You may need to re-create your MD RAID device /dev/md0.

Cheers, Andreas
--
Andreas Dilger
http://sourceforge.net/projects/ext2resize/
http://www-mddsp.enel.ucalgary.ca/People/adilger/

Re: [linux-lvm] Recovering a volume after OS upgrade (lost /etc/lvm*)

[Lars Kellogg-Stedman]

> can you please provide the output of lvmdiskscan?

Sure.  lvmdiskscan says:

  # lvmdiskscan
  lvmdiskscan -- reading all disks / partitions (this may take a
while...)
  lvmdiskscan -- /dev/sda  [       4.24 GB] free whole disk
  lvmdiskscan -- /dev/sdb  [       4.24 GB] free whole disk
  lvmdiskscan -- /dev/sdc  [       4.24 GB] free whole disk
  lvmdiskscan -- /dev/sdd  [       4.24 GB] free whole disk
  lvmdiskscan -- /dev/sde1 [      47.03 MB] Primary  LINUX native
partition [0x83]lvmdiskscan -- /dev/sde2 [       4.00 GB] Primary 
LINUX native partition [0x83]lvmdiskscan -- /dev/sde3 [     698.14 MB]
Primary  LINUX swap partition [0x82]
  lvmdiskscan -- /dev/md0  [       8.48 GB] free meta device
  lvmdiskscan -- 6 disks
  lvmdiskscan -- 4 whole disks
  lvmdiskscan -- 0 loop devices
  lvmdiskscan -- 1 multiple device
  lvmdiskscan -- 0 network block devices
  lvmdiskscan -- 3 partitions
  lvmdiskscan -- 0 LVM physical volume partitions

So lvmdiskscan doesn't see the PV, despite the fact that pvscan does:

  pvscan -- reading all physical volumes (this may take a while...)
  pvscan -- WARNING: physical volume "/dev/sda" belongs to a meta
device
  pvscan -- inactive PV "/dev/md0"  is associated to an unknown VG (run
vgscan)
  pvscan -- total: 2 [8.48 GB] / in use: 2 [8.48 GB] / in no VG: 0 [0]

Cheers,

  -- Lars


=====
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Re: [linux-lvm] Recovering a volume after OS upgrade (lost /etc/lvm*)

[Lars Kellogg-Stedman]

> You may need to re-create your MD RAID device /dev/md0.

The RAID device appears to be working just fine.  With the MD driver,
simply recreating /etc/raidtab and running raidstart worked without a
problem.

-- Lars


=====
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Re: [linux-lvm] Recovering a volume after OS upgrade (lost /etc/lvm*)

[Andreas Dilger]

On Nov 19, 2001  07:57 -0800, Lars Kellogg-Stedman wrote:
> The RAID device appears to be working just fine.  With the MD driver,
> simply recreating /etc/raidtab and running raidstart worked without a
> problem.

You saw the other posting about the MD devices fix?  This is fixed in
CVS, but not 1.0.1rc4.  Maybe it is time for a new LVM release.

Cheers, Andreas
--
Andreas Dilger
http://sourceforge.net/projects/ext2resize/
http://www-mddsp.enel.ucalgary.ca/People/adilger/

Re: [linux-lvm] Recovering a volume after OS upgrade (lost /etc/lvm*)

[Chad C. Walstrom]

[-- Attachment #1: Type: text/plain, Size: 470 bytes --]

On Mon, Nov 19, 2001 at 09:51:05AM -0700, Andreas Dilger wrote:
> You saw the other posting about the MD devices fix?  This is fixed in
> CVS, but not 1.0.1rc4.  Maybe it is time for a new LVM release.

<noise type="useless">
Yay! ;-)
</noise>

-- 
Chad Walstrom <chewie@wookimus.net>                 | a.k.a. ^chewie
http://www.wookimus.net/                            | s.k.a. gunnarr
Key fingerprint = B4AB D627 9CBD 687E 7A31  1950 0CC7 0B18 206C 5AFD


[-- Attachment #2: Type: application/pgp-signature, Size: 232 bytes --]

Re: [linux-lvm] Recovering a volume after OS upgrade (lost /etc/lvm*)

[Lars Kellogg-Stedman]

> You saw the other posting about the MD devices fix?  This is fixed in
> CVS, but not 1.0.1rc4.  Maybe it is time for a new LVM release.

Hmm, I missed the other post, but I'll try the latest from cvs and see
if that helps.

-- Lars


=====
lars@larsshack.org

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Re: [linux-lvm] Recovering a volume after OS upgrade (lost /etc/lvm*)

[Lars Kellogg-Stedman]

> You saw the other posting about the MD devices fix?  This is fixed in
> CVS, but not 1.0.1rc4.  Maybe it is time for a new LVM release.

That appears to have fixed the problem; vgscan now detects the older
logical volume and I can mount it successfully.

Now I've got a new problem, but it's going in a new thread :).

-- Lars


=====
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Re: [linux-lvm] Recovering a volume after OS upgrade (lost /etc/lvm*)

[Heinz J . Mauelshagen]

On Mon, Nov 19, 2001 at 09:51:05AM -0700, Andreas Dilger wrote:
> On Nov 19, 2001  07:57 -0800, Lars Kellogg-Stedman wrote:
> > The RAID device appears to be working just fine.  With the MD driver,
> > simply recreating /etc/raidtab and running raidstart worked without a
> > problem.
> 
> You saw the other posting about the MD devices fix?  This is fixed in
> CVS, but not 1.0.1rc4.  Maybe it is time for a new LVM release.

We are planning one for the end of the week.

> 
> Cheers, Andreas
> --
> Andreas Dilger
> http://sourceforge.net/projects/ext2resize/
> http://www-mddsp.enel.ucalgary.ca/People/adilger/
> 
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html

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    Nevertheless it needs not so stupid people to solve them ***

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Re: [linux-lvm] Recovering a volume after OS upgrade (lost /etc/lvm*)

[Ed Tomlinson]

On November 19, 2001 11:51 am, Andreas Dilger wrote:
> On Nov 19, 2001  07:57 -0800, Lars Kellogg-Stedman wrote:
> > The RAID device appears to be working just fine.  With the MD driver,
> > simply recreating /etc/raidtab and running raidstart worked without a
> > problem.
>
> You saw the other posting about the MD devices fix?  This is fixed in
> CVS, but not 1.0.1rc4.  Maybe it is time for a new LVM release.

If so please push the chagnes into the kernel asap.   Lets not end up months
behind in the kernel again - please!  When you release, send the patches to 
Linus or Marcelo at the same time.  If it was up to me I would send the patches
first, then release.

Thanks
Ed Tomlinson

Re: [linux-lvm] Recovering a volume after OS upgrade (lost /etc/lvm*)

[Andreas Dilger]

On Nov 20, 2001  08:16 -0500, Ed Tomlinson wrote:
> On November 19, 2001 11:51 am, Andreas Dilger wrote:
> > You saw the other posting about the MD devices fix?  This is fixed in
> > CVS, but not 1.0.1rc4.  Maybe it is time for a new LVM release.
> 
> If so please push the chagnes into the kernel asap.   Lets not end up months
> behind in the kernel again - please!  When you release, send the patches to 
> Linus or Marcelo at the same time.  If it was up to me I would send the
> patches first, then release.

The kernel and CVS are still different, so they need a bit of merging
anyways.  There is a _huge_ merge from Alan into the Linus tree right now,
to get the kernel up to 1.0.1rc4 or so.  I don't know if it is better to
do more changes now, or to wait until those previous changes are in an
official release, so there is less change all at the same time.

Cheers, Andreas
--
Andreas Dilger
http://sourceforge.net/projects/ext2resize/
http://www-mddsp.enel.ucalgary.ca/People/adilger/