mount ntfs-3g Linux man page

por | 3 enero, 2007

NAME
ntfs-3g – Third Generation NTFS Driver

SYNOPSIS
ntfs-3g device mount_point [-o options]

DESCRIPTION
ntfs-3g is a user space NTFS driver, which can create, remove, rename files, directories, hard links, and streams; it can read and write files, including streams and sparse files; it can handle special files like symbolic links, devices, and FIFOs; moreover it can also read compressed files.

OPTIONS
Below is a summary of the options that ntfs-3g accepts.

uid=, gid=, umask=
Provide default owner, group, and access mode mask. These options work as documented in mount(8). By default, the files and directories are owned by the user who mounted the volume but everybody has full read, write and executable access, moreover browse permission to any directory. If you want to use the currently limited permission handling then use these options together with the default_permissions, fmask and dmask options.
fmask=, dmask=
Instead of specifying umask which applies both to files and directories, fmask applies only to files and mask only to directories.
ro
Mount filesystem read-only.
locale=
You can set locale with this option. It’s useful if locale environment variables are not set before partitions had been mounted from /etc/fstab.
force
Force mount even if errors occurred. Use this option only if you know what are you doing.
show_sys_files
If show_sys_files is specified, show the system files in directory listings. Otherwise the default behaviour is to hide the system files. Note that even when show_sys_files is specified, “$MFT” may will not be visible due to bugs in glibc. Furthermore, note that irrespectively of show_sys_files, all files are accessible by name, i.e. you can always do “ls -l ‘$UpCase'” for example to show the system file containing the Unicode upcase table.
default_permissions
By default FUSE doesn’t check file access permissions, the filesystem is free to implement it’s access policy or leave it to the underlying file access mechanism (e.g. in case of network filesystems). This option enables permission checking, restricting access based on file mode. This option is usually useful together with the ‘allow_other’ mount option.
allow_other
This option overrides the security measure restricting file access to the user mounting the filesystem. This option is by default only allowed to root, but this restriction can be removed with a configuration option described in the previous section.
large_read
Issue large read requests. This can improve performance for some filesystems, but can also degrade performance. This option is mostly useful on 2.4.X kernels, as on 2.6 kernels requests size is automatically determined for optimum performance.
max_read=
With this option the maximum size of read operations can be set. The default is infinite. Note that the size of read requests is limited anyway to 32 pages (which is 128kbyte on i386).
silent
Do nothing on chmod and chown operations, but do not return error. This option is on by default.
no_def_opts
By default ntfs-3g acts as “silent,allow_other” was passed to it, this option cancel this behaviour.
streams_interface=
This option controls how the user can access Alternate Data Streams (ADS) or in other words, named data streams. It can be set to, one of none, windows or xattr. If the option is set to none, the user will have no access to the named data streams. If it’s set to windows, then the user can access them just like in Windows (eg. cat file:stream). If it’s set to xattr, then the named data streams are mapped to xattrs and user can manipulate them using {get,set}fattr utilities. The default is none.
debug
Makes ntfs-3g to not detach from terminal and print a lot of debug output from libntfs-3g and FUSE.
no_detach
Same as above but with less debug output.

ALTERNATE DATA STREAMS (ADS)
All data on NTFS is stored in streams. Every file has exactly one unnamed data stream and can have many named data streams. The size of a file is the size of its unnamed data stream. By default, ntfs-3g will only read the unnamed data stream.

By using the options “streams_interface=windows”, you will be able to read any named data streams, simply by specifying the stream’s name after a colon. For example:

cat some.mp3:artist

Named data streams act like normals files, so you can read from them, write to them and even delete them (using rm). You can list all the named data streams a file has by getting the “ntfs.streams.list” extended attribute.
EXAMPLES

Mount /dev/hda1 to /mnt/windows:

ntfs-3g /dev/hda1 /mnt/windows

Read-only mount /dev/hda5 to /home/user/mnt and make user with uid 1000 to be the owner of all files:

ntfs-3g /dev/hda5 /home/user/mnt -o ro,uid=1000

/etc/fstab entry for the above:

/dev/hda5 /home/user/mnt ntfs-3g ro,uid=1000 0 0

Umount /mnt/windows:

fusermount -u /mnt/windows

KNOWN ISSUES
Please see the README file for all known issues. If you would find a new one in the latest release of this software then please send an email describing it to the development team: linux-ntfs-dev@lists.sourceforge.net
AUTHORS
ntfs-3g is an improved ntfsmount which was originally written by Yura Pakhuchiy, with contributions from Yuval Fledel. The improvements were made by Szabolcs Szakacsits.
DEDICATION
With love to Marina Sapego.
THANKS
Many thanks to Miklos Szeredi for advice and answers about FUSE.

SEE ALSO
ntfsprogs(8), attr(5), getfattr(1)