Access VMs on old Proxmox disk


New Member
Jul 13, 2021
I did a fresh proxmox install on a new ssd.
On installation it recognizes that there was a vg "pve" on an old hard disc and asked me to rename it to "pve--OLD..." , so I did.
The new Proxmox Server comes up, and I see that it somehow recognizes both hard disks.


But it doesn't show any of my old vm's in the new installation.
It was mentioned that I should crreate a new vg but it just says there is no empty hard drive for it.

This is what it shows me in the console:
root@pve:~# lvs
  LV                         VG               Attr       LSize    Pool Origin        Data%  Meta%  Move Log Cpy%Sync Convert
  data                       pve              twi-a-tz-- <794.79g                    0.00   0.24                            
  root                       pve              -wi-ao----   96.00g                                                           
  swap                       pve              -wi-ao----    8.00g                                                           
  data                       pve-OLD-1ED18B1F twi-aotz--    1.67t                    4.28   0.37                            
  root                       pve-OLD-1ED18B1F -wi-a-----   96.00g                                                           
  snap_vm-102-disk-0_working pve-OLD-1ED18B1F Vri---tz-k  500.00g data vm-102-disk-0                                        
  swap                       pve-OLD-1ED18B1F -wi-a-----    8.00g                                                           
  vm-100-disk-0              pve-OLD-1ED18B1F Vwi-a-tz--   20.00g data               16.82                                  
  vm-102-disk-0              pve-OLD-1ED18B1F Vwi-a-tz--  500.00g data               13.18                                  
  vm-102-state-working       pve-OLD-1ED18B1F Vwi-a-tz--  <16.50g data               5.66                                   
  vm-200-disk-0              pve-OLD-1ED18B1F Vwi-a-tz--   10.00g data               7.82                                   
  vm-201-disk-0              pve-OLD-1ED18B1F Vwi-a-tz--   50.00g data               4.12

root@pve:~# lsblk
NAME                                               MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda                                                  8:0    0   1.8T  0 disk 
├─sda1                                               8:1    0  1007K  0 part 
├─sda2                                               8:2    0   512M  0 part 
└─sda3                                               8:3    0   1.8T  0 part 
  ├─pve--OLD--1ED18B1F-swap                        253:0    0     8G  0 lvm  
  ├─pve--OLD--1ED18B1F-root                        253:1    0    96G  0 lvm  
  ├─pve--OLD--1ED18B1F-data_tmeta                  253:2    0  15.8G  0 lvm  
  │ └─pve--OLD--1ED18B1F-data-tpool                253:4    0   1.7T  0 lvm  
  │   ├─pve--OLD--1ED18B1F-data                    253:5    0   1.7T  1 lvm  
  │   ├─pve--OLD--1ED18B1F-vm--100--disk--0        253:6    0    20G  0 lvm  
  │   ├─pve--OLD--1ED18B1F-vm--200--disk--0        253:7    0    10G  0 lvm  
  │   ├─pve--OLD--1ED18B1F-vm--201--disk--0        253:8    0    50G  0 lvm  
  │   ├─pve--OLD--1ED18B1F-vm--102--disk--0        253:9    0   500G  0 lvm  
  │   └─pve--OLD--1ED18B1F-vm--102--state--working 253:10   0  16.5G  0 lvm  
  └─pve--OLD--1ED18B1F-data_tdata                  253:3    0   1.7T  0 lvm  
    └─pve--OLD--1ED18B1F-data-tpool                253:4    0   1.7T  0 lvm  
      ├─pve--OLD--1ED18B1F-data                    253:5    0   1.7T  1 lvm  
      ├─pve--OLD--1ED18B1F-vm--100--disk--0        253:6    0    20G  0 lvm  
      ├─pve--OLD--1ED18B1F-vm--200--disk--0        253:7    0    10G  0 lvm  
      ├─pve--OLD--1ED18B1F-vm--201--disk--0        253:8    0    50G  0 lvm  
      ├─pve--OLD--1ED18B1F-vm--102--disk--0        253:9    0   500G  0 lvm  
      └─pve--OLD--1ED18B1F-vm--102--state--working 253:10   0  16.5G  0 lvm  
nvme0n1                                            259:0    0 931.5G  0 disk 
├─nvme0n1p1                                        259:1    0  1007K  0 part 
├─nvme0n1p2                                        259:2    0   512M  0 part 
└─nvme0n1p3                                        259:3    0   931G  0 part 
  ├─pve-swap                                       253:11   0     8G  0 lvm  [SWAP]
  ├─pve-root                                       253:12   0    96G  0 lvm  /
  ├─pve-data_tmeta                                 253:13   0   8.1G  0 lvm  
  │ └─pve-data                                     253:15   0 794.8G  0 lvm  
  └─pve-data_tdata                                 253:14   0 794.8G  0 lvm  
    └─pve-data                                     253:15   0 794.8G  0 lvm

I'm also not able to mount any disk as I tried:

root@pve:~# mount /dev/mapper/pve--OLD--1ED18B1F-vm--102--disk--0 /mnt/vm102-tpool/
mount: /mnt/vm102-tpool: wrong fs type, bad option, bad superblock on /dev/mapper/pve--OLD--1ED18B1F-vm--102--disk--0, missing codepage or helper program, or other error.

I also could not simply boot the old hard drive, as it seems to be tied to the vg name pve...

I am kinda lost and don't know what I should try next.
I guess I'm a step closer:

I managed to install a lvm via Datacenter->Storage and point it to the old disk.
I just still don't get how to use vm-102-disk-0 as a VM
I would be happy, if I would be able to just recover the files on my old disk.

I tried
root@pve:~# kpartx -avr /dev/mapper/pve--OLD--1ED18B1F-vm--102--disk--0
pve--OLD--1ED18B1F-vm--102--disk--0p1 : 0 409600 /dev/mapper/pve--OLD--1ED18B1F-vm--102--disk--0 2048
pve--OLD--1ED18B1F-vm--102--disk--0p2 : 0 1048164319 /dev/mapper/pve--OLD--1ED18B1F-vm--102--disk--0 411648

root@pve:~# cryptsetup luksOpen /dev/mapper/pve--OLD--1ED18B1F-vm--102--disk--0p2 luks
Enter passphrase for /dev/mapper/pve--OLD--1ED18B1F-vm--102--disk--0p2:
device-mapper: reload ioctl on luks (253:20) failed: Invalid argument
somehow the device-mapper fails.
Can anyone give me any hint on what to do?


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