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NAME    [Toc]    [Back]

     mount_ntfs - mount an NTFS file system

SYNOPSIS    [Toc]    [Back]

     mount_ntfs [-a] [-i] [-u uid] [-g  gid]  [-m  mask]  special

DESCRIPTION    [Toc]    [Back]

     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
     that they own (provided, of course, that they have appropriate access to
     the device that contains the file system).

     The special device must correspond to a partition registered
in the

     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

     -i      Make name lookup case insensitive for all names  except POSIX

     -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    [Toc]    [Back]

   NTFS file attributes
     NTFS file attributes can be accessed in the following way:


     `ATTRTYPE' is one of identifier listed in $AttrDef  file  of
volume.  Default
  is  $DATA.  `ATTRNAME' is an attribute name.  Default
is none.


     To get volume name (in Unicode):

           # cat /mnt/olume:OLUME_NAME

     To read directory raw data:

           # cat /mnt/foodir:NDEX_ROOT:30

   Limited support for writing    [Toc]    [Back]
     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

     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    [Toc]    [Back]

     mount(2), unmount(2), disklabel(5), fstab(5),  disklabel(8),

HISTORY    [Toc]    [Back]

     Support for NTFS first appeared in FreeBSD 3.0.  It was later ported to
     OpenBSD and first appeared in OpenBSD 3.4.

AUTHORS    [Toc]    [Back]

     NTFS kernel implementation, mount_ntfs, and this manual were
     written by Semen Ustimenko <semenu@FreeBSD.org>.

     The OpenBSD port was done by
     Julien Bordet <zejames@greyhats.org>.

BUGS    [Toc]    [Back]

     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' on i386 (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      3.6                         October     31,     2001
[ Back ]
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