The mount procedure below use the loop0 device, check that its free with

[[email protected] Scaricati]# losetup --all
    [[email protected] Scaricati]#

otherwise use loop1/2/3…

CHECK IMAGE

[[email protected] Scaricati]# file backup-cloud.img
    backup-cloud.img: LVM2 PV (Linux Logical Volume Manager), UUID: NiSuLv-fH2Z-eO4H-JoJ2-9yuG-fWvW-gmuJak, size: 10212081664
    [[email protected] Scaricati]# fdisk -l backup-cloud.img
    
    Disk backup-cloud.img: 10.2 GB, 10212040704 bytes, 19945392 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    
    [[email protected] Scaricati]#

MOUNT:

[[email protected] Scaricati]# losetup /dev/loop0 backup-cloud.img
    [[email protected] Scaricati]# pvs
      PV         VG   Fmt  Attr PSize PFree
      /dev/loop0 vg   lvm2 a--  9,51g    0
    [[email protected] Scaricati]# vgchange -a y vg
      2 logical volume(s) in volume group "vg" now active
    [[email protected] Scaricati]# mount -o ro /dev/vg/lv_root /mnt/old/
    [[email protected] Scaricati]#

UMOUNT:

[[email protected] Scaricati]# umount /mnt/old/
    [[email protected] Scaricati]# vgchange -a n vg
      0 logical volume(s) in volume group "vg" now active
    [[email protected] Scaricati]# losetup -d /dev/loop0
Last modify on Sunday December 06, 2020