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MOUNT_MSDOSFS(8)        FreeBSD System Manager's Manual       MOUNT_MSDOSFS(8)

     mount_msdosfs - mount an MS-DOS file system

     mount_msdosfs [-9ls] [-D DOS_codepage] [-g gid] [-L locale] [-M mask]
                   [-m mask] [-o options] [-u uid] [-W table] special node

     The mount_msdosfs utility attaches the MS-DOS file system residing on the
     device special to the global file system 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 MS-DOS 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 options are as follows:

     -o options
             Use the specified mount options, as described in mount(8).  The
             following MSDOS file system-specific options are available:

             large   Support file systems larger than 128 gigabytes at the
                     expense of 32 bytes of kernel memory for each file on
                     disk.  This memory will not be reclaimed until the file
                     system has been unmounted.

                     Force Windows 95 long filenames to be visible.

                     Force only the old MS-DOS 8.3 style filenames to be

                     Completely ignore Windows 95 extended file information.

     -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.  (For example, a mask of 755 specifies that, by default,
             the owner should have read, write, and execute permissions for
             files, but others should only have read and execute permissions.
             See chmod(1) for more information about octal file modes.  Only
             the nine low-order bits of mask are used.  The value of -M is
             used if it is supplied and -m is omitted.  The default mask is
             taken from the directory on which the file system is being

     -M mask
             Specify the maximum file permissions for directories in the file
             system.  The value of -m is used if it is supplied and -M is
             omitted.  See the previous option's description for details.

     -s      Force behaviour to ignore and not generate Win'95 long filenames.

     -l      Force listing and generation of Win'95 long filenames and
             separate creation/modification/access dates.

             If neither -s nor -l are given, mount_msdosfs searches the root
             directory of the file system to be mounted for any existing
             Win'95 long filenames.  If no such entries are found, but short
             DOS filenames are found, -s is the default.  Otherwise -l is

     -9      Ignore the special Win'95 directory entries even if deleting or
             renaming a file.  This forces -s.

     -L locale
             Specify locale name used for file name conversions for DOS and
             Win'95 names.  By default ISO 8859-1 assumed as local character

     -D DOS_codepage
             Specify the MS-DOS code page (aka IBM/OEM code page) name used
             for file name conversions for DOS names.

     -W table
             This option is preserved for backward compatibility purpose only,
             and will be removed in the future.  Please avoid using this

             Specify text file name with conversion table: iso22dos, iso72dos,
             koi2dos, koi8u2dos.

     To mount a Russian MS-DOS file system located in /dev/ad1s1:

           mount_msdosfs -L ru_RU.KOI8-R -D CP866 /dev/ad1s1 /mnt

     To mount a Japanese MS-DOS file system located in /dev/ad1s1:

           mount_msdosfs -L ja_JP.eucJP -D CP932 /dev/ad1s1 /mnt

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

     List of Localized MS Operating Systems:

     The use of the -9 flag could result in damaged file systems, albeit the
     damage is in part taken care of by procedures similar to the ones used in

     FreeBSD 2.1 and earlier versions could not handle cluster sizes larger
     than 16K.  Just mounting an MS-DOS file system could cause corruption to
     any mounted file system.  Cluster sizes larger than 16K are unavoidable
     for file system sizes larger than 1G, and also occur when file systems
     larger than 1G are shrunk to smaller than 1G using FIPS.

     The mount_msdosfs utility first appeared in FreeBSD 2.0.  Its
     predecessor, the mount_pcfs utility appeared in FreeBSD 1.0, and was
     abandoned in favor of the more aptly-named mount_msdosfs.

     The character code conversion routine was added by Ryuichiro Imura
     <> at 2003.

FreeBSD 11.0-PRERELEASE        December 23, 2008       FreeBSD 11.0-PRERELEASE


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