NAME
mount_ntfs —
mount an NTFS file
system
SYNOPSIS
mount_ntfs |
[-a]
[-i]
[-u uid]
[-g gid]
[-m mask]
special node |
DESCRIPTION
The
mount_ntfs command attaches the NTFS filesystem residing
on the device
special to the global filesystem namespace at
the location indicated by
node. Both
special and
node are converted to
absolute paths before use. This command is normally executed by
mount(8) at boot time, but can be
used by any user to mount an NTFS file system on any directory that they own
(provided, of course, that they have appropriate access to the device that
contains the file system).
The supported NTFS versions include both NTFS4, as used by Microsoft Windows NT
4.0, and NTFS5, as used by Microsoft Windows 2000 and XP.
The options are as follows:
-
-
- -a
- Force behaviour to return MS-DOS 8.3 names also on
readdir(3).
-
-
- -i
- Make name lookup case insensitive for all names except
POSIX names.
-
-
- -u
uid
- Set the owner of the files in the file system to
uid. The default owner is the owner of the directory
on which the file system is being mounted.
-
-
- -g
gid
- Set the group of the files in the file system to
gid. The default group is the group of the directory
on which the file system is being mounted.
-
-
- -m
mask
- Specify the maximum file permissions for files in the file
system.
FEATURES
NTFS file attributes
NTFS file attributes can be accessed in the following way:
foo[[:ATTRTYPE]:ATTRNAME]
‘ATTRTYPE’ is one of identifier listed in $AttrDef file of volume.
Default is $DATA. ‘ATTRNAME’ is an attribute name. Default is
none.
Examples:
To get volume name (in Unicode):
# cat /mnt/\$Volume:\$VOLUME_NAME
To read directory raw data:
# cat /mnt/foodir:\$INDEX_ROOT:\$I30
Limited support for writing
There is limited writing ability for files. Limitations:
- file must be
non-resident
- file must
not contain any holes (uninitialized areas)
- file can't be
compressed
Note that it's not currently possible to create or remove files on NTFS
filesystems.
Warning: do not mount NTFS filesystems read-write. The write
support is not very useful and is not tested well. It's not safe to write to
any file on NTFS; you might damage the filesystem. Unless you want to debug
NTFS filesystem code, mount the NTFS filesystem read-only.
SEE ALSO
mount(2),
unmount(2),
fstab(5),
disklabel(8),
mbrlabel(8),
mount(8)
HISTORY
Support for NTFS first appeared in
FreeBSD 3.0. It was
ported to
NetBSD and first appeared in
NetBSD 1.5.
AUTHORS
NTFS kernel implementation,
mount_ntfs and this manual were
originally written by
Semen Ustimenko
<
semenu@FreeBSD.org>.
The
NetBSD port was done by
Christos Zoulas ⟨christos@NetBSD.org⟩ and
Jaromir Dolecek ⟨jdolecek@NetBSD.org⟩.
BUGS
The write support should be enhanced to actually be able to change file size,
and to create and remove files and directories. It's not very useful right
now.
If the attempt to mount NTFS gives you an error like this:
# mount -t ntfs /dev/wd0k /mnt
mount_ntfs: /dev/wd0k on /mnt: Invalid argument
make sure that appropriate partition has correct entry in the disk label,
particularly that the partition offset is correct.
Recently many cards (in particular SDXC ones) are formatted using exFAT. For
those cards, disklabel reports NTFS as the partition type. There is currently
no support for mounting exFAT drives.
If the NTFS partition is the first partition on the disk, the offset should be
'63' or '2048' on i386 (see
disklabel(8)). exFAT
partitions typically report an offset of '32768'.
mbrlabel(8) could help you to
set up the disk label correctly.
If the NTFS partition is marked as ‘
dynamic
’
under Microsoft Windows XP, it won't be possible to access it under
NetBSD anymore.