| [4122007] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| [5a9404bb] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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| [ff769b8c] | 3 | "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
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| [4122007] | 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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| [f45b1953] | 8 | <sect1 id="postlfs-filesystems-ext3">
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| [5a9404bb] | 9 | <?dbhtml filename="ext3.html"?>
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| 10 |
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| 11 | <sect1info>
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| 12 | <othername>$LastChangedBy$</othername>
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| 13 | <date>$Date$</date>
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| 14 | </sect1info>
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| 15 |
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| 16 | <title>Ext3</title>
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| 17 |
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| 18 | <para>Ext3 is a journaling file system that is an extension to the ext2
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| [99b1c520] | 19 | file system. It is backward compatible with ext2 and the conversion from
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| [5a9404bb] | 20 | ext2 to ext3 is trivial.</para>
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| 21 |
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| 22 | <para>You don't need to install anything to use ext3, all the required
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| 23 | packages are available with a bare LFS system.</para>
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| 24 |
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| 25 | <para>When building the kernel, ensure that you have compiled in ext3
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| [99b1c520] | 26 | support. If you want your root partition to be ext3, then compile the ext3
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| 27 | support in the kernel, else you may compile it as a module. Recompile the
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| [5a9404bb] | 28 | kernel if needed.</para>
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| 29 |
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| [99b1c520] | 30 | <para>Edit your <filename>/etc/fstab</filename>. For each partition that you
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| 31 | want to convert into ext3, edit the entry so that it looks similar to the
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| [5a9404bb] | 32 | following line.</para>
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| 33 |
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| [4daebcb1] | 34 | <screen><literal>/dev/hd<replaceable>[XX]</replaceable> /mnt_point ext3 defaults 1 1</literal></screen>
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| [5a9404bb] | 35 |
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| [99b1c520] | 36 | <para>In the above line, replace
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| [5a9404bb] | 37 | <filename>/dev/hd<replaceable>[XX]</replaceable></filename> by the
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| [99b1c520] | 38 | partition (e.g., <filename>/dev/hda2</filename>),
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| 39 | <filename class="directory">/mnt_point</filename> by the mount point (e.g.,
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| [4daebcb1] | 40 | <filename class="directory">/home</filename>). The <option>1</option> in the
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| 41 | last field ensures that the partition will be checked for
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| 42 | consistency during the boot process by the <command>checkfs</command> script
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| 43 | as recommended by the maintainer.
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| [5a9404bb] | 44 | You may replace the <option>ext3</option> fs type in the above by
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| [99b1c520] | 45 | <option>auto</option> if you want to ensure that the partition is mounted
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| [4daebcb1] | 46 | even if you accidentally disable ext3 support in the kernel.</para>
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| [5a9404bb] | 47 |
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| 48 | <para>For each partition that you have converted to ext3 in <filename>
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| [99b1c520] | 49 | /etc/fstab</filename>, enable the journal for the partition by running the
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| [5a9404bb] | 50 | following command.</para>
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| 51 |
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| 52 | <screen role="root"><userinput>tune2fs -j /dev/hd<replaceable>[XX]</replaceable></userinput></screen>
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| 53 |
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| 54 | <para>Remount the concerned partitions, or simply reboot if you have
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| 55 | recompiled the kernel to enable ext3 support.</para>
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| 56 |
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| 57 | <para>More information is available at <ulink
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| 58 | url="http://www.zip.com.au/~akpm/linux/ext3/ext3-usage.html"/>. This
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| [8732295] | 59 | information is still relevant to the 2.6 kernels.</para>
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| [f45b1953] | 60 |
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| 61 | </sect1>
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