Mount Partitions in Disk Image

• losetup_partscan: If you have util-linux v2.21 or higher (for example, Ubuntu 16.04).
• partprobe: If you have a recent kernel, and pass loop.max_part=63 on boot (if loop is built-in) or to modprobe (if loop is a module).
• kpartx: apt install kpartx
• losetup_offsetsizelimit: AlwaysWorks™

If you have util-linux v2.21 or higher, you can now do this with losetup. Use the -P (–partscan) option to read the partition table and create device nodes for each partition.

• http://stackoverflow.com/a/15200862

1. Mount image as loop device

   # losetup -P /dev/loop0 rpool.img

2. Finish

   # ls /dev/loop0* -l
   brw-rw---- 1 root disk   7, 0 Mar 26 13:36 /dev/loop0
   brw-rw---- 1 root disk 259, 2 Mar 26 13:36 /dev/loop0p1
   brw-rw---- 1 root disk 259, 3 Mar 26 13:36 /dev/loop0p9

1. Unload loop device

   # losetup -d /dev/loop0

If you have a recent kernel, and pass loop.max_part=63 on boot (if loop is built-in) or to modprobe (if loop is a module).

• https://superuser.com/a/345476

1. Mount image as loop device

   # losetup /dev/loop0 rpool.img

2. Run partprobe

   # partprobe /dev/loop0

3. Finish

   # ls /dev/loop0* -l
   brw-rw---- 1 root disk   7, 0 Mar 26 13:23 /dev/loop0
   brw-rw---- 1 root disk 259, 0 Mar 26 13:23 /dev/loop0p1
   brw-rw---- 1 root disk 259, 1 Mar 26 13:23 /dev/loop0p9

1. Unload loop device

   # losetup -d /dev/loop0

• https://nfolamp.wordpress.com/2010/08/16/mounting-raw-image-files-and-kpartx/

1. Mount image as loop device

   # losetup /dev/loop0 rpool.img

2. List partitions in loop

   # kpartx -l /dev/loop0
   loop0p1 : 0 44019712 /dev/loop0 2048
   loop0p9 : 0 16384 /dev/loop0 44021760

3. Create device mappings of partitions

   # kpartx -av /dev/loop0
   add map loop0p1 (252:0): 0 44019712 linear 7:0 2048
   add map loop0p9 (252:1): 0 16384 linear 7:0 44021760

4. Finish

   # ls /dev/mapper/loop0* -l
   lrwxrwxrwx 1 root root       7 Mar 26 13:16 loop0p1 -> ../dm-0
   lrwxrwxrwx 1 root root       7 Mar 26 13:16 loop0p9 -> ../dm-1

1. Disconnect the device map files using kpartx

   # kpartx -dv /dev/loop0
   del devmap : loop0p9
   del devmap : loop0p1

2. Unload loop device

   # losetup -d /dev/loop0

• https://www.suse.com/communities/blog/accessing-file-systems-disk-block-image-files/

1. Get partition details

   # fdisk -l rpool.img
   Disk rpool.img: 21 GiB, 22548578304 bytes, 44040192 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
   Disklabel type: gpt
   Disk identifier: B37248EB-F1D7-DA47-A42D-4C42AF20D328
   
   Device        Start      End  Sectors Size Type
   rpool.img1     2048 44021759 44019712  21G Solaris /usr & Apple ZFS
   rpool.img9 44021760 44038143    16384   8M Solaris reserved 1

2. Setup loop device

   # losetup /dev/loop0 rpool.img --offset $((512 * 2048)) --sizelimit $((512 * 44019712))

1. Unload loop device

   # losetup -d /dev/loop0