man/systemd-fsck@.service.xml

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   7   Copyright 2012 Lennart Poettering
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  22 <refentry id="systemd-fsck@.service">
  23
  24   <refentryinfo>
  25     <title>systemd-fsck@.service</title>
  26     <productname>systemd</productname>
  27
  28     <authorgroup>
  29       <author>
  30         <contrib>Developer</contrib>
  31         <firstname>Lennart</firstname>
  32         <surname>Poettering</surname>
  33         <email>lennart@poettering.net</email>
  34       </author>
  35     </authorgroup>
  36   </refentryinfo>
  37
  38   <refmeta>
  39     <refentrytitle>systemd-fsck@.service</refentrytitle>
  40     <manvolnum>8</manvolnum>
  41   </refmeta>
  42
  43   <refnamediv>
  44     <refname>systemd-fsck@.service</refname>
  45     <refname>systemd-fsck-root.service</refname>
  46     <refname>systemd-fsck</refname>
  47     <refpurpose>File system checker logic</refpurpose>
  48   </refnamediv>
  49
  50   <refsynopsisdiv>
  51     <para><filename>systemd-fsck@.service</filename></para>
  52     <para><filename>systemd-fsck-root.service</filename></para>
  53     <para><filename>/usr/lib/systemd/systemd-fsck</filename></para>
  54   </refsynopsisdiv>
  55
  56   <refsect1>
  57     <title>Description</title>
  58
  59     <para><filename>systemd-fsck@.service</filename> and
  60     <filename>systemd-fsck-root.service</filename> are services
  61     responsible for file system checks. They are instantiated for each
  62     device that is configured for file system checking.
  63     <filename>systemd-fsck-root.service</filename> is responsible for
  64     file system checks on the root file system, but in only if the
  65     root filesystem wasn't checked in the initramfs.
  66     <filename>systemd-fsck@.service</filename> is used for all other
  67     file systems and for the root file system in the initramfs.</para>
  68
  69     <para>Those services are started at boot if
  70     <option>passno</option> in <filename>/etc/fstab</filename> for the
  71     file system is set to a value greater than zero. The file system
  72     check for root is performed before the other file systems. Other
  73     file systems may be checked in parallel, except when they are one
  74     the same rotating disk.</para>
  75
  76     <para><filename>systemd-fsck</filename> does not know any details
  77     about specific filesystems, and simply executes file system
  78     checkers specific to each filesystem type
  79     (<filename>/sbin/fsck.*</filename>). This helper will decide if
  80     the filesystem should actually be checked based on the time since
  81     last check, number of mounts, unclean unmount, etc.</para>
  82
  83     <para><filename>systemd-fsck</filename> will forward file system
  84     checking progress to the console. If a file system check fails for
  85     a service without <option>nofail</option>, emergency mode is
  86     activated, by isolating to
  87     <filename>emergency.target</filename>.</para>
  88   </refsect1>
  89
  90   <refsect1>
  91     <title>Kernel Command Line</title>
  92
  93     <para><filename>systemd-fsck</filename> understands one kernel
  94     command line parameter:</para>
  95
  96     <variablelist class='kernel-commandline-options'>
  97       <varlistentry>
  98         <term><varname>fsck.mode=</varname></term>
  99
 100         <listitem><para>One of <literal>auto</literal>,
 101         <literal>force</literal>, <literal>skip</literal>. Controls
 102         the mode of operation. The default is <literal>auto</literal>,
 103         and ensures that file system checks are done when the file
 104         system checker deems them necessary. <literal>force</literal>
 105         unconditionally results in full file system checks.
 106         <literal>skip</literal> skips any file system
 107         checks.</para></listitem>
 108       </varlistentry>
 109
 110       <varlistentry>
 111         <term><varname>fsck.repair=</varname></term>
 112
 113         <listitem><para>One of <literal>preen</literal>,
 114         <literal>yes</literal>, <literal>no</literal>. Controls the
 115         mode of operation. The default is <literal> preen</literal>,
 116         and will automatically repair problems that can be safely
 117         fixed. <literal>yes </literal> will answer yes to all
 118         questions by fsck and <literal>no</literal> will answer no to
 119         all questions. </para></listitem>
 120       </varlistentry>
 121     </variablelist>
 122   </refsect1>
 123
 124   <refsect1>
 125     <title>See Also</title>
 126     <para>
 127       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 128       <citerefentry><refentrytitle>fsck</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 129       <citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 130       <citerefentry><refentrytitle>fsck.btrfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 131       <citerefentry><refentrytitle>fsck.cramfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 132       <citerefentry><refentrytitle>fsck.ext4</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 133       <citerefentry><refentrytitle>fsck.fat</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 134       <citerefentry><refentrytitle>fsck.hfsplus</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 135       <citerefentry><refentrytitle>fsck.minix</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 136       <citerefentry><refentrytitle>fsck.ntfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 137       <citerefentry><refentrytitle>fsck.xfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 138     </para>
 139   </refsect1>
 140
 141 </refentry>