Re: [linux-lvm] cannot access LVM1 any more

[Paul Muster <paul.muster@gmx.net>]

Hello, there,


I still need help regarding this topic. Do you need some more 
information? Then please tell me.

In the meantime the system has been reinstalled, but a clone copy of the 
old system exists. I am trying to rescue the old data. When working on 
this I found a vgcfgbackup-file with valid-looking data. It begins with

---
# Generated by LVM2: <Date>

contents = "Text Format Volume Group"
version = 1
---

When trying "vgcfgrestore -f </above/described/file> volg1" on a Knoppix 
5.0.1 with LVM version 2.02.05 (Details at the end of quoted posting) I get

PV /dev/hde2 is a different format (seqno lvm1)
Restore failed.

What can I do to get my data back?


Thanks

Paul


Paul Muster wrote:
> Hello everybody,
> 
> 
> I have a really big problem: I cannot access my LVM1 PVs, VGs an LVs any more. So the system does not boot up.
> 
> The system was installed with Debian Woody and LVM1. I created 1 PV, 1 VG and some LVs. Later (maybe when changing to Sarge or Etch) I moved to LVM2, so I thought, I could remove the package lvm10 from the system. At some time I added another PV to the VG, resized one of the LVs.
> 
> Maybe because of one of this or when changing from Kernel 2.4 to 2.6.18 I obviously lost support for LVM1.
> 
> The last messages from the running system were:
> 
> # vgdisplay 
>     Invalid LV in extent map (PV /dev/sda3, PE 1080, LV 5, LE 0) 
>     Couldn't fill logical volume maps. 
>     Invalid LV in extent map (PV /dev/sda3, PE 1080, LV 5, LE 0) 
>     Couldn't fill logical volume maps. 
>     Volume group "volg1" not found
> 
> As said before, after a reboot the system did not come up again telling me, it cannot find the LVs.
> 
> 
> Please help me as I need the system and don't want to reinstall it. If you need some more information, please drop me a mail.
> 
> 
> Maybe there is a live-CD with old LVM1-support available with which I could boot, activate the old LVM, chroot to it and reinstall the lvm10-Package? (I would need the module megaraid since the PVs are on an hardware-RAID.)
> 
> 
> Thanks a lot in advance.
> 
> Paul
> 
> 
> Some details:
> 
> # fdisk -l /dev/sda 
>  
> Disk /dev/sda: 73.4 GB, 73410805760 bytes 
>  254 heads, 63 sectors/track, 8960 cylinders 
>  Units = cylinders of 16002 * 512 = 8193024 bytes 
>  
>     Device Boot      Start         End      Blocks   Id  System 
>  /dev/sda1   *           1         244     1952212+  83  Linux 
>  /dev/sda2             245        4485    33932241   8e  Linux LVM 
>  /dev/sda3            4486        8960    35804475   8e  Linux LVM 
>  
> There are two PVs, because some time the 36GB disk was replaced by a 7GB one. 
>  
> # pvdisplay 
>     --- Physical volume --- 
>     PV Name               /dev/sda2 
>     VG Name               volg1 
>     PV Size               32,36 GB / not usable 48,95 MB 
>     Allocatable           yes (but full) 
>     PE Size (KByte)       32768 
>     Total PE              1034 
>     Free PE               0 
>     Allocated PE          1034 
>     PV UUID               O17ru0-C8v2-3iLh-6isM-Z3n5-mn41-6nhDky 
>  
>    --- Physical volume --- 
>     PV Name               /dev/sda3 
>     VG Name               volg1 
>     PV Size               34,15 GB / not usable 53,31 MB 
>     Allocatable           yes 
>     PE Size (KByte)       32768 
>     Total PE              1091 
>     Free PE               11 
>     Allocated PE          1080 
>     PV UUID               pe1zVS-YN39-Rw1k-Esfg-WIdG-cl5h-OhDZmF 
>  
> One VolumeGroup on the PVs: 
>  
> # vgdisplay 
>     --- Volume group --- 
>     VG Name               volg1 
>     System ID             Knoppix1091952233 
>     Format                lvm1 
>     VG Access             read/write 
>     VG Status             resizable 
>     MAX LV                256 
>     Cur LV                5 
>     Open LV               5 
>     Max PV                256 
>     Cur PV                2 
>     Act PV                2 
>     VG Size               66,41 GB 
>     PE Size               32,00 MB 
>     Total PE              2125 
>     Alloc PE / Size       2114 / 66,06 GB 
>     Free  PE / Size       11 / 352,00 MB 
>     VG UUID               J75sG2-mUcD-aUet-g4EV-y3AS-UNfb-2LRwhj 
>  
> with some LVs inside: 
>  
> # lvdisplay 
>     --- Logical volume --- 
>     LV Name                /dev/volg1/logv1 
>     VG Name                volg1 
>     LV UUID                000000-0000-0000-0000-0000-0000-000000 
>     LV Write Access        read/write 
>     LV Status              available 
>     # open                 1 
>     LV Size                1,97 GB 
>     Current LE             63 
>     Segments               1 
>     Allocation             normal 
>     Read ahead sectors     1024 
>     Block device           254:0 
>  
> [...] 

And from another posting:

> # pvscan --version
>   LVM version:     2.02.05 (2006-04-21)
>   Library version: 1.02.05 (2006-04-19)
>   Driver version:  4.6.0
> 
> also only tells:
> 
> # pvscan
>   Invalid LV in extent map (PV /dev/sda3, PE 1080, LV 5, LE 0)
>   Couldn't fill logical volume maps.
>   Invalid LV in extent map (PV /dev/sda3, PE 1080, LV 5, LE 0)
>   Couldn't fill logical volume maps.
>   No matching physical volumes found
>