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.. SPDX-License-Identifier: GPL-2.0
=====
NTFS3
=====
Summary and Features
====================
NTFS3 is fully functional NTFS Read-Write driver. The driver works with NTFS
versions up to 3.1. File system type to use on mount is *ntfs3*.
- This driver implements NTFS read/write support for normal, sparse and
compressed files.
- Supports native journal replaying.
- Supports NFS export of mounted NTFS volumes.
- Supports extended attributes. Predefined extended attributes:
- *system.ntfs_security* gets/sets security
Descriptor: SECURITY_DESCRIPTOR_RELATIVE
- *system.ntfs_attrib* gets/sets ntfs file/dir attributes.
Note: Applied to empty files, this allows to switch type between
sparse(0x200), compressed(0x800) and normal.
Mount Options
=============
The list below describes mount options supported by NTFS3 driver in addition to
generic ones. You can use every mount option with **no** option. If it is in
this table marked with no it means default is without **no**.
.. flat-table::
:widths: 1 5
:fill-cells:
* - iocharset=name
- This option informs the driver how to interpret path strings and
translate them to Unicode and back. If this option is not set, the
default codepage will be used (CONFIG_NLS_DEFAULT).
Example: iocharset=utf8
* - uid=
- :rspan:`1`
* - gid=
* - umask=
- Controls the default permissions for files/directories created after
the NTFS volume is mounted.
* - dmask=
- :rspan:`1` Instead of specifying umask which applies both to files and
directories, fmask applies only to files and dmask only to directories.
* - fmask=
* - noacsrules
- "No access rules" mount option sets access rights for files/folders to
777 and owner/group to root. This mount option absorbs all other
permissions.
- Permissions change for files/folders will be reported as successful,
but they will remain 777.
- Owner/group change will be reported as successful, butthey will stay
as root.
* - nohidden
- Files with the Windows-specific HIDDEN (FILE_ATTRIBUTE_HIDDEN) attribute
will not be shown under Linux.
* - sys_immutable
- Files with the Windows-specific SYSTEM (FILE_ATTRIBUTE_SYSTEM) attribute
will be marked as system immutable files.
* - discard
- Enable support of the TRIM command for improved performance on delete
operations, which is recommended for use with the solid-state drives
(SSD).
* - force
- Forces the driver to mount partitions even if volume is marked dirty.
Not recommended for use.
* - sparse
- Create new files as sparse.
* - showmeta
- Use this parameter to show all meta-files (System Files) on a mounted
NTFS partition. By default, all meta-files are hidden.
* - prealloc
- Preallocate space for files excessively when file size is increasing on
writes. Decreases fragmentation in case of parallel write operations to
different files.
* - acl
- Support POSIX ACLs (Access Control Lists). Effective if supported by
Kernel. Not to be confused with NTFS ACLs. The option specified as acl
enables support for POSIX ACLs.
Todo list
=========
- Full journaling support over JBD. Currently journal replaying is supported
which is not necessarily as effectice as JBD would be.
References
==========
- Commercial version of the NTFS driver for Linux.
https://www.paragon-software.com/home/ntfs-linux-professional/
- Direct e-mail address for feedback and requests on the NTFS3 implementation.
almaz.alexandrovich@paragon-software.com
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