Arch Linux

Paradoxali

Member

Registered: 2017-11-15

Posts: 1

Can't mount/extract UDF image

I have an image file from a DVD:

disk.img: UDF filesystem data (version 2.x)

The image can be mounted on Windows with no problem.
But on archlinux (6.18.3-arch1-1)

sudo mount -t udf disk.img /mnt

shows:

mount: /mnt: wrong fs type, bad option, bad superblock on /dev/loop0, missing codepage or helper program, or other error.
       dmesg(1) may have more information after failed mount system call.

and

sudo dmesg

shows:

[11964.579086] UDF-fs: error (device loop0): udf_load_sparable_map: error loading logical volume descriptor: Too big sparing table size (6144)
[11964.579090] UDF-fs: Scanning with blocksize 2048 failed
[11964.579315] UDF-fs: warning (device loop0): udf_load_vrs: No anchor found
[11964.579317] UDF-fs: Scanning with blocksize 4096 failed
[11964.579318] UDF-fs: warning (device loop0): udf_fill_super: No partition found (1)

apparently it is related to:
https://patchwork.kernel.org/project/li … k@suse.cz/

Is this really impossible in Linux?
Is there a way to extract the contents without mounting it? because

7z x disk.img

shows:

7-Zip 25.01 (x64) : Copyright (c) 1999-2025 Igor Pavlov : 2025-08-03
 64-bit locale=C.UTF-8 Threads:8 OPEN_MAX:1024, ASM

Scanning the drive for archives:
1 file, 1466761216 bytes (1399 MiB)

Extracting archive: disk.img
ERROR: disk.img
Cannot open the file as archive


Can't open as archive: 1
Files: 0
Size:       0
Compressed: 0

Lone_Wolf

Administrator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 14,801

Re: Can't mount/extract UDF image

Try https://archlinux.org/packages/extra/x86_64/udftools/

Its release notes indicate it has atleast some support for large sparing tables

Last edited by Lone_Wolf (2026-01-08 10:40:32)

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Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

clean chroot building not flexible enough ?
Try clean chroot manager by graysky