MOUNT_NTFS(8) OpenBSD System Manager's Manual MOUNT_NTFS(8)NAMEmount_ntfs - mount an NTFS file system
SYNOPSISmount_ntfs [-ai] [-g gid] [-m mask] [-o options] [-u uid] 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. 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 special device is either a disklabel(8) UID (DUID) or an entry in
/dev. If it is a DUID, it will be automatically mapped to the
appropriate entry in /dev. In either case the partition must be present
in the disklabel loaded from the device. The partition name is the last
letter in the entry name. For example, /dev/sd0a and 3eb7f9da875cb9ee.a
both refer to the `a' partition.
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().
-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.
-i Make name lookup case insensitive for all names except POSIX
names.
-m mask
Specify the maximum file permissions for files in the file
system.
-o options
Options are specified with a -o flag followed by a comma
separated string of options. See the mount(8) man page for
possible options and their meanings.
-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.
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:
o file must be non-resident
o file must not contain any holes (uninitialized areas)
o 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 ALSOmount(2), unmount(2), disklabel(5), fstab(5), disklabel(8), mount(8)HISTORY
Support for NTFS first appeared in FreeBSD 3.0. It was later ported to
OpenBSD and first appeared in OpenBSD 3.4.
AUTHORS
NTFS kernel implementation, mount_ntfs, and this manual were originally
written by Semen Ustimenko <semenu@FreeBSD.org>.
The OpenBSD port was done by Julien Bordet <zejames@greyhats.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 the appropriate partition has the correct entry in the
disk label, particularly that the partition offset is correct. If the
NTFS partition is the first partition on the disk, the offset should be
'63' (see disklabel(8)).
If the NTFS partition is marked as `dynamic' under Microsoft Windows XP,
it won't be possible to access it under OpenBSD anymore.
OpenBSD 4.9 October 13, 2010 OpenBSD 4.9