how to mount a disk image rw with liveCD?

[nta]

How to mount a disk image (/dev/pve/vm-100-disk-1 or /dev/mapper/pve-vm--100--disk--1) as rw to work on files inside it when booting from liveCD?

 

[fireon]

You don't need do mount /dev/pve/vm-XXX. You boot with an livecd? Then mount the virtual harddrive normaly. For example: /dev/sdax, /dev/vdax

 

[udo]

How to mount a disk image (/dev/pve/vm-100-disk-1 or /dev/mapper/pve-vm--100--disk--1) as rw to work on files inside it when booting from liveCD?

Hi,
live-CD on the host or VM?
On the VM - like fireon wrote.
On host - depends on your Storage (lvm, dir, zfs).

Udo

 

[nta]

Hi,
live-CD on the host or VM?
On the VM - like fireon wrote.
On host - depends on your Storage (lvm, dir, zfs).

Udo

I booted a Ubuntu live CD and the images are on the LVM thin volume that the PVE installation created.

 

[LnxBil]

You need to get the partitions to show themselves with kpartx

root@proxmox4 ~ > ls -l /dev/mapper/san--dx100-vm--8003--disk--1*
lrwxrwxrwx 1 root root 9 Jan 13 09:09 /dev/mapper/san--dx100-vm--8003--disk--1 -> ../dm-102
root@proxmox4 ~ > kpartx -a /dev/mapper/san--dx100-vm--8003--disk--1
root@proxmox4 ~ > ls -l /dev/mapper/san--dx100-vm--8003--disk--1*
lrwxrwxrwx 1 root root 9 Jan 13 09:09 /dev/mapper/san--dx100-vm--8003--disk--1 -> ../dm-102
lrwxrwxrwx 1 root root 7 Jan 22 10:06 /dev/mapper/san--dx100-vm--8003--disk--1p1 -> ../dm-0

Then you can mount it directly:

root@proxmox4 ~ > mount /dev/mapper/san--dx100-vm--8003--disk--1p1 /media
root@proxmox4 ~ > df -hT /media
Dateisystem                                Typ  Größe Benutzt Verf. Verw% Eingehängt auf
/dev/mapper/san--dx100-vm--8003--disk--1p1 ntfs  4,0G    1,5G  2,5G   38% /media

And if you want to unmount it properly, this does the trick:

root@proxmox4 ~ > umount /dev/mapper/san--dx100-vm--8003--disk--1p1
root@proxmox4 ~ > kpartx -d /dev/mapper/san--dx100-vm--8003--disk--1
root@proxmox4 ~ > ls -l /dev/mapper/san--dx100-vm--8003--disk--1*
lrwxrwxrwx 1 root root 9 Jan 13 09:09 /dev/mapper/san--dx100-vm--8003--disk--1 -> ../dm-102

 

[udo]

I booted a Ubuntu live CD and the images are on the LVM thin volume that the PVE installation created.

Hi,
like LnxBil wrote, but first you must activate the logical volume. Look with vgs and lvs and activate with "vgchange -a".

Udo

 

[nta]

Thank you!
I was able to get it. Thank you so much!