---
name: "mount_udf"
section: "8"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["freebsd", "openbsd"]
url: "https://new.carta.tech/mount_udf"
---

# mount\_udf(8)

mount a UDF filesystem

## NAME

**mount\_udf** – mount a UDF filesystem

## SYNOPSIS

**mount\_udf** \[**-o** *options*\] *special* *node*

## DESCRIPTION

The **mount\_udf** command attaches a UDF filesystem (typically found on a DVD) residing on the device *special* to the global filesystem namespace at the location indicated by *node*. The filesystem is always mounted readonly. This command is invoked by [mount(8)](/mount/8.md) when using the syntax

**mount** \[options\] -t udf *special* *node*

The options are as follows:

- **-o** *options*

  Options are specified with a **-o** flag followed by a comma separated string of options. See the [mount(8)](/mount/8.md) man page for possible options and their meanings.

## SEE ALSO

[mount(2)](/mount/2.md), [fstab(5)](/fstab/5.md), [mount(8)](/mount/8.md), [umount(8)](/umount/8.md), [vnconfig(8)](/vnconfig/8.md)

## HISTORY

UDF support first appeared in FreeBSD 5.0, and was then ported to OpenBSD 3.8.

## AUTHORS

Scott Long ⟨*scottl@freebsd.org*⟩ did the original work; Pedro Martelletto ⟨*pedro@openbsd.org*⟩ adapted it to OpenBSD.