fs.5

FILESYSTEMS(5)             Linux Programmer's Manual            FILESYSTEMS(5)



NAME
       filesystems - Linux filesystem types: minix, ext, ext2, ext3, xia,
       msdos, umsdos, vfat, proc, nfs, iso9660, hpfs, sysv, smb, ncpfs

DESCRIPTION
       When, as is customary, the proc filesystem is mounted on /proc, you can
       find in the file /proc/filesystems which filesystems your kernel
       currently supports.  If you need a currently unsupported one, insert
       the corresponding module or recompile the kernel.

       In order to use a filesystem, you have to mount it, see mount(8) for
       the mount command, and for the available mount options.

       Below a short description of a few of the available filesystems.


       minix  is the filesystem used in the Minix operating system, the first
              to run under Linux.  It has a number of shortcomings: a 64MB
              partition size limit, short filenames, a single time stamp, etc.
              It remains useful for floppies and RAM disks.

       ext    is an elaborate extension of the minix filesystem.  It has been
              completely superseded by the second version of the extended
              filesystem (ext2) and has been removed from the kernel (in
              2.1.21).

       ext2   is the high performance disk filesystem used by Linux for fixed
              disks as well as removable media.  The second extended
              filesystem was designed as an extension of the extended file
              system (ext).  ext2 offers the best performance (in terms of
              speed and CPU usage) of the filesystems supported under Linux.

       ext3   is a journaling version of the ext2 filesystem. It is easy to
              switch back and forth between ext2 and ext3.

       xiafs  was designed and implemented to be a stable, safe filesystem by
              extending the Minix filesystem code.  It provides the basic most
              requested features without undue complexity.  The xia filesystem
              is no longer actively developed or maintained.  It was removed
              from the kernel in 2.1.21.

       msdos  is the filesystem used by DOS, Windows, and some OS/2 computers.
              msdos filenames can be no longer than 8 characters, followed by
              an optional period and 3 character extension.

       umsdos is an extended DOS filesystem used by Linux.  It adds capability
              for long filenames, UID/GID, POSIX permissions, and special
              files (devices, named pipes, etc.)  under the DOS filesystem,
              without sacrificing compatibility with DOS.

       vfat   is an extended DOS filesystem used by Microsoft Windows95 and
              Windows NT.  VFAT adds the capability to use long filenames
              under the MSDOS filesystem.

       proc   is a pseudo-filesystem which is used as an interface to kernel
              data structures rather than reading and interpreting /dev/kmem.
              In particular, its files do not take disk space. See proc(5).

       iso9660
              is a CD-ROM filesystem type conforming to the ISO 9660 standard.

              High Sierra
                     Linux supports High Sierra, the precursor to the ISO 9660
                     standard for CD-ROM filesystems.  It is automatically
                     recognized within the iso9660 filesystem support under
                     Linux.

              Rock Ridge
                     Linux also supports the System Use Sharing Protocol
                     records specified by the Rock Ridge Interchange Protocol.
                     They are used to further describe the files in the
                     iso9660 filesystem to a UNIX host, and provide
                     information such as long filenames, UID/GID, POSIX
                     permissions, and devices.  It is automatically recognized
                     within the iso9660 filesystem support under Linux.

       hpfs   is the High Performance Filesystem, used in OS/2.  This
              filesystem is read-only under Linux due to the lack of available
              documentation.

       sysv   is an implementation of the SystemV/Coherent filesystem for
              Linux.  It implements all of Xenix FS, SystemV/386 FS, and
              Coherent FS.

       nfs    is the network filesystem used to access disks located on remote
              computers.

       smb    is a network filesystem that supports the SMB protocol, used by
              Windows for Workgroups, Windows NT, and Lan Manager.

              To use smb fs, you need a special mount program, which can be
              found in the ksmbfs package, found at
              ftp://sunsite.unc.edu/pub/Linux/system/Filesystems/smbfs.

       ncpfs  is a network filesystem that supports the NCP protocol, used by
              Novell NetWare.

              To use ncpfs, you need special programs, which can be found at
              ftp://linux01.gwdg.de/pub/ncpfs.

SEE ALSO
       proc(5), fsck(8), mkfs(8), mount(8)



                                  2001-12-07                    FILESYSTEMS(5)