2a9d576bec
inodes greater than 128-bytes are not supported. PR: 207813 Submitted by: pfg Sponsored by: Essen Hackathon 2016
193 lines
6.5 KiB
XML
193 lines
6.5 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!--
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The FreeBSD Documentation Project
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$FreeBSD$
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-->
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<chapter xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0"
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xml:id="filesystems">
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<info>
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<title>Other File Systems</title>
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<authorgroup>
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<author><personname><firstname>Tom</firstname><surname>Rhodes</surname></personname><contrib>Written
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by </contrib></author>
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</authorgroup>
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</info>
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<sect1 xml:id="filesystems-synopsis">
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<title>Synopsis</title>
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<indexterm><primary>File Systems</primary></indexterm>
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<indexterm>
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<primary>File Systems Support</primary>
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<see>File Systems</see>
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</indexterm>
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<para>File systems are an integral part of any operating system.
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They allow users to upload and store files, provide access to
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data, and make hard drives useful. Different operating systems
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differ in their native file system. Traditionally, the native
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&os; file system has been the Unix File System
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<acronym>UFS</acronym> which has been modernized as
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<acronym>UFS2</acronym>. Since &os; 7.0, the Z File System
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(<acronym>ZFS</acronym>) is also available as a native file
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system. See <xref linkend="zfs"/> for more information.</para>
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<para>In addition to its native file systems, &os; supports a
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multitude of other file systems so that data from other
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operating systems can be accessed locally, such as data stored
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on locally attached <acronym>USB</acronym> storage devices,
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flash drives, and hard disks. This includes support for the
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&linux; Extended File System (<acronym>EXT</acronym>) and the
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Reiser file system.</para>
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<para>There are different levels of &os; support for the various
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file systems. Some require a kernel module to be loaded and
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others may require a toolset to be installed. Some non-native
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file system support is full read-write while others are
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read-only.</para>
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<para>After reading this chapter, you will know:</para>
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<itemizedlist>
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<listitem>
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<para>The difference between native and supported file
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systems.</para>
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</listitem>
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<listitem>
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<para>Which file systems are supported by &os;.</para>
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</listitem>
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<listitem>
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<para>How to enable, configure, access, and make use of
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non-native file systems.</para>
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</listitem>
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</itemizedlist>
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<para>Before reading this chapter, you should:</para>
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<itemizedlist>
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<listitem>
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<para>Understand &unix; and
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<link linkend="basics">&os; basics</link>.</para>
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</listitem>
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<listitem>
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<para>Be familiar with the basics of <link
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linkend="kernelconfig">kernel configuration and
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compilation</link>.</para>
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</listitem>
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<listitem>
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<para>Feel comfortable <link linkend="ports">installing
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software</link> in &os;.</para>
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</listitem>
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<listitem>
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<para>Have some familiarity with <link
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linkend="disks">disks</link>, storage, and device names in
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&os;.</para>
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</listitem>
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</itemizedlist>
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</sect1>
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<sect1 xml:id="filesystems-linux">
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<title>&linux; File Systems</title>
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<para>&os; provides built-in support for several &linux; file
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systems. This section demonstrates how to load support for and
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how to mount the supported &linux; file systems.</para>
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<sect2>
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<title><acronym>ext2</acronym></title>
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<para>Kernel support for ext2 file systems has
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been available since &os; 2.2. In &os; 8.x and
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earlier, the code is licensed under the
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<acronym>GPL</acronym>. Since &os; 9.0, the code has
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been rewritten and is now <acronym>BSD</acronym>
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licensed.</para>
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<para>The &man.ext2fs.5; driver allows the &os; kernel to both
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read and write to ext2 file systems.</para>
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<note>
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<para>
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This driver can also be used to access ext3 and ext4 file
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systems. However, ext3 journaling and extended attributes
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are not supported. Support for ext4 is read-only.</para>
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</note>
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<para>To access an ext file system, first
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load the kernel loadable module:</para>
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<screen>&prompt.root; <userinput>kldload ext2fs</userinput></screen>
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<para>Then, mount the ext volume by specifying its &os;
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partition name and an existing mount point. This example
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mounts <filename>/dev/ad1s1</filename> on
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<filename>/mnt</filename>:</para>
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<screen>&prompt.root; <userinput>mount -t ext2fs <replaceable>/dev/ad1s1</replaceable> <replaceable>/mnt</replaceable></userinput></screen>
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</sect2>
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<sect2>
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<title>ReiserFS</title>
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<para>&os; provides read-only support for The Reiser file
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system, ReiserFS.</para>
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<para>To load the &man.reiserfs.5; driver:</para>
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<screen>&prompt.root; <userinput>kldload reiserfs</userinput></screen>
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<para>Then, to mount a ReiserFS volume located on
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<filename>/dev/ad1s1</filename>:</para>
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<screen>&prompt.root; <userinput>mount -t reiserfs <replaceable>/dev/ad1s1</replaceable> <replaceable>/mnt</replaceable></userinput></screen>
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</sect2>
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</sect1>
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<!--
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<sect1>
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<title>Device File System</title>
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</sect1>
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<sect1>
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<title>DOS and NTFS File Systems</title>
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<para>This is a good section for those who transfer files, using
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USB devices, from Windows to FreeBSD and vice-versa. My camera,
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and many other cameras I have seen default to using FAT16. There
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is (was?) a kde utility, I think called kamera, that could be used
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to access camera devices. A section on this would be useful.</para>
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<para>XXXTR: Though! The disks chapter, covers a bit of this and
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devfs under it's USB devices. It leaves a lot to be desired though,
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see:
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http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/usb-disks.html
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It may be better to flesh out that section a bit more. Add the
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word "camera" to it so that others can easily notice.</para>
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</sect1>
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<sect1>
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<title>Linux EXT File System</title>
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<para>Probably NOT as useful as the other two, but it requires
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knowledge of the existence of the tools. Which are hidden in
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the ports collection. Most Linux guys would probably only use
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Linux, BSD guys would be smarter and use NFS.</para>
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</sect1>
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<sect1>
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<title>HFS</title>
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<para>I think this is the file system used on Apple OSX. There are
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tools in the ports collection, and with Apple being a big
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FreeBSD supporter and user of our technologies, surely there
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is enough cross over to cover this?</para>
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</sect1>
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-->
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</chapter>
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