---
name: "cd9660"
section: "4"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["freebsd"]
url: "https://new.carta.tech/cd9660"
---

# cd9660(4)

ISO-9660 file system

## NAME

**cd9660** – ISO-9660 file system

## SYNOPSIS

To link into the kernel:

**options CD9660**

Alternatively, to load the driver as a module at boot time, place the following line in [loader.conf(5)](/loader.conf/5.md):

```
cd9660_load="YES"
```

## DESCRIPTION

The **cd9660** driver will permit the FreeBSD kernel to access the cd9660 file system.

## EXAMPLES

To mount a **cd9660** volume located on */dev/cd0*:

```
mount -t cd9660 /dev/cd0 /mnt
```

## SEE ALSO

[etdump(1)](/etdump/1.md), [nmount(2)](/nmount/2.md), [unmount(2)](/unmount/2.md), [cd(4)](/cd/4.md), [fstab(5)](/fstab/5.md), [mount(8)](/mount/8.md), [mount\_cd9660(8)](/mount_cd9660/8.md)

## HISTORY

The **cd9660** driver first appeared in 4.4BSD-Lite.

## AUTHORS

The **cd9660** kernel implementation was originally written by Pace Willisson ⟨*pace@blitz.com*⟩ and Atsushi Murai ⟨*amurai@spec.co.jp*⟩.

This manual page was written by Enji Cooper ⟨*ngie@FreeBSD.org*⟩.