mount(8cdfs)mount(8cdfs)Name
mount, umount - mount and unmount a ISO 9660 (CD-ROM) File System
(CDFS)
Syntax
/etc/mount -t cdfs [ -r -o options ] device directory
/etc/umount [ -v ] directory
Description
The command allows you to mount an ISO 9660 or High Sierra (HSG) for‐
matted file system onto a directory. Once a file system or directory
has been mounted, it is treated as a file system.
The argument device must refer to a block special file.
The file directory must exist and must be a directory. It becomes the
name of the newly mounted file system.
General users can mount file systems with certain restrictions in addi‐
tion to those listed in
The command unmounts the file system that was previously mounted on the
specified directory.
Options-r Indicates that the file system is to be mounted read only.
Please note this is a mandatory option, and is appended to
the mount string if not present.
-v Tells what did or did not happen. (Verbose flag)
-o options Specifies options as a sequence of comma-separated words
from the list below. The defaults are:
ro,defperm,pgthresh=64
The CDFS options are:
defperm Files and directories recorded on an ISO 9660 formatted
file system may or may not have permission bits. This
options ignores these permissions bits, if present, and
defaults all file and directory permissions to the value
0666, with a zero UID (owned by root). This is a default
option since the permissions on most of the existing ISO
9660 formatted CD-ROM's do not map into the UID scheme
ULTRIX uses.
nodefperm Use the on-disk permission bits, if present. If a file or
directory is not recorded with permissions bits, the 0666
default is used.
noversion If a file recorded on an ISO 9660 formatted file system
contains a version string, strip off the ';#' extension.
Files and directory names are displayed in lowercase let‐
ters and name matching is performed in a case-insensitive
manner. This option should be used in conjunction with
mounting a CD-ROM containing MS-DOS applications.
The option for is:
-v Tells what did or did not happen. (Verbose flag)
Restrictions
If mounting of an ISO 9660 or HSG volume fails with
cdfs_mount: Operation Not Supported
refer to the reference page for details pertaining to the correct sys‐
tem configuration file options which must exist prior to using the
CDFS.
If the directory on which a file system is to be mounted is a symbolic
link, the file system is mounted on the directory to which the symbolic
link refers, rather than being mounted on top of the symbolic link
itself.
Examples
The command invokes to do its work. A sample command is:
# mount -t cdfs -o pgthresh=100 /dev/rz3c /cdrom
To mount the ISO 9660 formatted file system on the block device onto
the local directory with the file version strings stripped, type:
# mount -t cdfs -o noversion /dev/rz3c /cdfs
Files
File system information file
CDFS-specific mount program
See Alsogetmnt(2), mount(2), fstab(5), mount(8), umount(8), cdfs(5cdfs)mount(8cdfs)
