FSCK and multi partition mount from disk image file

root@nodes:~# kpartx -v -a /dev/pve/vm-104-disk-0
add map pve-vm--104--disk--0p1 (252:6): 0 2048 linear 252:8 2048
add map pve-vm--104--disk--0p2 (252:12): 0 3715072 linear 252:8 4096
add map pve-vm--104--disk--0p3 (252:13): 0 38221824 linear 252:8 3719168

mount /dev/mapper/pve-vm--104--disk--0p1 /mnt/

kpartx -dv /dev/pve/vm-104-disk-0

Helpful links:
https://superuser.com/questions/211338/how-to-mount-a-multi-partition-disk-image-in-linux