[8bc3edae] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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[13a9b259] | 7 | <!ENTITY lvm2-download-http "https://sourceware.org/pub/lvm2/LVM2.&lvm2-version;.tgz">
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| 8 | <!ENTITY lvm2-download-ftp "ftp://sourceware.org/pub/lvm2/LVM2.&lvm2-version;.tgz">
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| 9 | <!ENTITY lvm2-md5sum "f63cc5feaadd3000138e73f7143ed370">
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[8fef77a] | 10 | <!ENTITY lvm2-size "2.3 MB">
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[13a9b259] | 11 | <!ENTITY lvm2-buildsize "33 MB (add at least 239 MB for tests in the /tmp directory; additionally transient files can grow up to around 500 MB)">
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| 12 | <!ENTITY lvm2-time "0.2 SBU (using parallelism=4; add 12 SBU for tests)">
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[8bc3edae] | 13 | ]>
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| 14 |
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[c627795] | 15 | <sect1 id="lvm2" xreflabel="LVM2-&lvm2-version;">
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[8bc3edae] | 16 | <?dbhtml filename="lvm2.html"?>
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| 17 |
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| 18 | <sect1info>
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| 19 | <othername>$LastChangedBy$</othername>
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| 20 | <date>$Date$</date>
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| 21 | </sect1info>
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| 22 |
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[c627795] | 23 | <title>LVM2-&lvm2-version;</title>
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[8bc3edae] | 24 |
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| 25 | <indexterm zone="lvm2">
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[c627795] | 26 | <primary sortas="a-LVM2">LVM2</primary>
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[8bc3edae] | 27 | </indexterm>
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| 28 |
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| 29 | <sect2 role="package">
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[c627795] | 30 | <title>Introduction to LVM2</title>
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[8bc3edae] | 31 |
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[c627795] | 32 | <para>
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[99fcc47] | 33 | The <application>LVM2</application> package is a set of tools that manage
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[c627795] | 34 | logical partitions. It allows spanning of file systems across multiple
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| 35 | physical disks and disk partitions and provides for dynamic growing or
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[99fcc47] | 36 | shrinking of logical partitions, mirroring and low storage footprint
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| 37 | snapshots.
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[c627795] | 38 | </para>
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[8bc3edae] | 39 |
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[82e1be5] | 40 | &lfs83_checked;
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[8bc3edae] | 41 |
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| 42 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 43 | <itemizedlist spacing="compact">
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[f60cf4a] | 44 | <listitem>
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[c627795] | 45 | <para>
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| 46 | Download (HTTP): <ulink url="&lvm2-download-http;"/>
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| 47 | </para>
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[f60cf4a] | 48 | </listitem>
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[8bc3edae] | 49 | <listitem>
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[c627795] | 50 | <para>
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| 51 | Download (FTP): <ulink url="&lvm2-download-ftp;"/>
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| 52 | </para>
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[8bc3edae] | 53 | </listitem>
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| 54 | <listitem>
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[c627795] | 55 | <para>
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| 56 | Download MD5 sum: &lvm2-md5sum;
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| 57 | </para>
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[8bc3edae] | 58 | </listitem>
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| 59 | <listitem>
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[c627795] | 60 | <para>
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| 61 | Download size: &lvm2-size;
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| 62 | </para>
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[8bc3edae] | 63 | </listitem>
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| 64 | <listitem>
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[c627795] | 65 | <para>
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| 66 | Estimated disk space required: &lvm2-buildsize;
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| 67 | </para>
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[8bc3edae] | 68 | </listitem>
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| 69 | <listitem>
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[c627795] | 70 | <para>
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| 71 | Estimated build time: &lvm2-time;
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| 72 | </para>
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[8bc3edae] | 73 | </listitem>
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| 74 | </itemizedlist>
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| 75 |
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[b5e8375] | 76 | <bridgehead renderas="sect3">LVM2 Dependencies</bridgehead>
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| 77 |
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[13a9b259] | 78 | <bridgehead renderas="sect4">Required</bridgehead>
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| 79 | <para role="required">
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| 80 | <xref linkend='libaio'/>,
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| 81 | </para>
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| 82 |
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[b5e8375] | 83 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 84 | <para role="optional">
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[99fcc47] | 85 | <xref linkend='mdadm'/>,
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| 86 | <xref linkend='reiserfs'/>,
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| 87 | <xref linkend='valgrind'/>,
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| 88 | <xref linkend='which'/>,
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| 89 | <xref linkend='xfsprogs'/> (all five may be used, but are not required,
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| 90 | for tests), and
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| 91 | <ulink url='https://github.com/jthornber/thin-provisioning-tools'>
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| 92 | thin-provisioning-tools</ulink>
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[b5e8375] | 93 | </para>
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| 94 |
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[8bc3edae] | 95 | <para condition="html" role="usernotes">User Notes:
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[c627795] | 96 | <ulink url="&blfs-wiki;/lvm2"/>
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| 97 | </para>
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[09765cf] | 98 |
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[e7670a4] | 99 | <caution>
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[09765cf] | 100 | <para>
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[e7670a4] | 101 | Kernel versions between 4.1 and 4.4.1 have a broken RAID
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| 102 | implementation. If you want to use RAID type LV's, you should install
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| 103 | kernel version 4.4.2 or above. Note that several tests use RAID logical
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| 104 | volumes, and can generate a <quote>kernel oops</quote> with the faulty
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| 105 | kernel version, which usually renders the system unusable.
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[09765cf] | 106 | </para>
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[e7670a4] | 107 | </caution>
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[8bc3edae] | 108 | </sect2>
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| 109 |
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[c627795] | 110 | <sect2 role="kernel" id="lvm2-kernel">
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[7e1df8f9] | 111 | <title>Kernel Configuration</title>
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| 112 |
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[c627795] | 113 | <para>
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[421128a1] | 114 | Enable the following options in the kernel configuration
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[c627795] | 115 | and recompile the kernel:
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| 116 | </para>
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[7e1df8f9] | 117 |
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[b5e8375] | 118 | <note><para>
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| 119 | There are several other Device Mapper options in the kernel beyond those
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| 120 | listed below. In order to get reasonable results if running the
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| 121 | regression tests, all must be enabled either internally or as a module.
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[302a619] | 122 | The tests will all time out if Magic SysRq key is not enabled.
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[b5e8375] | 123 | </para></note>
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| 124 |
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[7e1df8f9] | 125 | <screen><literal>Device Drivers --->
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[421128a1] | 126 | [*] Multiple devices driver support (RAID and LVM) ---> [CONFIG_MD]
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| 127 | <*/M> Device mapper support [CONFIG_BLK_DEV_DM]
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| 128 | <*/M/ > Crypt target support [CONFIG_DM_CRYPT]
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| 129 | <*/M/ > Snapshot target [CONFIG_DM_SNAPSHOT]
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[99fcc47] | 130 | <*/M/ > Thin provisioning target [CONFIG_DM_THIN_PROVISIONING]
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[302a619] | 131 | <*/M/ > Mirror target [CONFIG_DM_MIRROR]
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| 132 | Kernel hacking --->
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| 133 | [*] Magic SysRq key [CONFIG_MAGIC_SYSRQ]</literal></screen>
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[7e1df8f9] | 134 |
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| 135 | <indexterm zone="lvm2 lvm2-kernel">
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| 136 | <primary sortas="d-lvm2">lvm2</primary>
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| 137 | </indexterm>
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| 138 |
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| 139 | </sect2>
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| 140 |
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[8bc3edae] | 141 | <sect2 role="installation">
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[c627795] | 142 | <title>Installation of LVM2</title>
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[8bc3edae] | 143 |
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[c627795] | 144 | <para>
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| 145 | Install <application>LVM2</application> by running the following
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| 146 | commands:
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| 147 | </para>
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[8bc3edae] | 148 |
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[422bd2c] | 149 | <screen revision="sysv"><userinput>SAVEPATH=$PATH &&
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[41d504a] | 150 | PATH=$PATH:/sbin:/usr/sbin &&
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[e94d178] | 151 | ./configure --prefix=/usr \
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[4591404] | 152 | --exec-prefix= \
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| 153 | --enable-cmdlib \
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| 154 | --enable-pkgconfig \
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[46a9711b] | 155 | --enable-udev_sync &&
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[e94d178] | 156 | make &&
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| 157 | PATH=$SAVEPATH &&
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[422bd2c] | 158 | unset SAVEPATH</userinput></screen>
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| 159 |
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| 160 | <screen revision="systemd"><userinput>SAVEPATH=$PATH &&
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| 161 | PATH=$PATH:/sbin:/usr/sbin &&
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| 162 | ./configure --prefix=/usr \
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| 163 | --exec-prefix= \
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| 164 | --with-confdir=/etc \
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| 165 | --enable-cmdlib \
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| 166 | --enable-pkgconfig \
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| 167 | --enable-udev_sync &&
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| 168 | make &&
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| 169 | PATH=$SAVEPATH &&
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[e94d178] | 170 | unset SAVEPATH</userinput></screen>
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[8bc3edae] | 171 |
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[c627795] | 172 | <para>
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[99fcc47] | 173 | The tests use <application>udev</application> for logical volume
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| 174 | synchronization, so that the LVM udev rules and some utilities need to
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| 175 | be installed before running the tests. If you are installing
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| 176 | <application>LVM2</application> for the first time, and do not
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| 177 | want to install the full package before running the tests, the minimal
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| 178 | set of utilities can be installed by running the following instructions
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| 179 | as the <systemitem class="username">root</systemitem> user:
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| 180 | </para>
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| 181 |
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| 182 | <screen role="root"><userinput>make -C tools install_dmsetup_dynamic &&
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| 183 | make -C udev install &&
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| 184 | make -C libdm install</userinput></screen>
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| 185 |
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| 186 | <para>
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| 187 | To test the results, issue: <command>make check_local</command> as the
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| 188 | <systemitem class="username">root</systemitem> user. Other targets are
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| 189 | available and can be listed with <command>make -C test help</command>.
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| 190 | The test timings are very dependent on the speed of the disk(s), and on
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[f9431b6] | 191 | the number of enabled kernel options.
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| 192 | </para>
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[20c731a] | 193 |
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[6c6f393] | 194 | <!-- Results for LVM2.2.02.176:
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| 195 | ### 292 tests: 177 passed, 46 skipped, 0 timed out, 60 warned, 9 failed
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[20c731a] | 196 | -->
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| 197 |
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[f9431b6] | 198 | <para>
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[af8a78d] | 199 | The tests do not implement the <quote>expected fail</quote> possibility,
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[e94d178] | 200 | and a small number of test failures is expected by upstream. More
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[f9431b6] | 201 | failures may happen because some kernel options are missing. For example,
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| 202 | the lack of the <emphasis>dm-delay</emphasis> device mapper target may
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[53375fc] | 203 | explain some failures. Some tests are flagged
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[e94d178] | 204 | <quote>warned</quote> if
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[f9431b6] | 205 | <ulink url='https://github.com/jthornber/thin-provisioning-tools'>
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| 206 | thin-provisioning-tools</ulink> are not installed. A workaround is to
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| 207 | add the following flags to <command>configure</command>:
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| 208 | </para>
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| 209 |
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| 210 | <screen role="nodump"><userinput> --with-thin-check= \
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| 211 | --with-thin-dump= \
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| 212 | --with-thin-repair= \
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| 213 | --with-thin-restore= \
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| 214 | --with-cache-check= \
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| 215 | --with-cache-dump= \
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| 216 | --with-cache-repair= \
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| 217 | --with-cache-restore= \</userinput></screen>
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| 218 |
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| 219 | <para>
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[e94d178] | 220 | Some tests may hang with kernel versions in the 4.1 and 4.2 series (see
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| 221 | above). They can be removed if necessary, for example: <command>rm
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| 222 | test/shell/lvcreate-large-raid.sh</command>. The tests generate a lot
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[99fcc47] | 223 | of kernel messages, which may clutter your terminal. You can disable them
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| 224 | by issuing <command>dmesg -D</command> before running the tests (do not
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| 225 | forget to issue <command>dmesg -E</command> when tests are done).
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[fbcb3846] | 226 |
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| 227 | <note><simpara>The checks create device nodes in the /tmp directory. The
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| 228 | tests will fail if /tmp is mounted with the nodev
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| 229 | option.</simpara></note>
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[c627795] | 230 | </para>
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[8bc3edae] | 231 |
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[c627795] | 232 | <para>
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| 233 | Now, as the <systemitem class="username">root</systemitem> user:
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| 234 | </para>
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[8bc3edae] | 235 |
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| 236 | <screen role="root"><userinput>make install</userinput></screen>
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| 237 |
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| 238 | </sect2>
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| 239 |
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| 240 | <sect2 role="commands">
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| 241 | <title>Command Explanations</title>
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| 242 |
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[e94d178] | 243 | <para>
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[41d504a] | 244 | <command>PATH=$PATH:/sbin:/usr/sbin</command>: The path
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[e94d178] | 245 | must contain <filename class="directory">/sbin</filename> and
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| 246 | <filename class='directory'>/usr/sbin</filename> for proper system tool
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[41d504a] | 247 | detection by the <command>configure</command> script. This instruction
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[41e2bf5] | 248 | ensures that PATH is properly set even if you build as an unprivileged user.
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[e94d178] | 249 | </para>
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| 250 |
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[c627795] | 251 | <para>
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[2800af7] | 252 | <parameter>--enable-cmdlib</parameter>: This switch enables
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[c627795] | 253 | building of the shared command library. It is required
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| 254 | when building the event daemon.
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| 255 | </para>
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| 256 |
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| 257 | <para>
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[2800af7] | 258 | <parameter>--enable-pkgconfig</parameter>: This switch enables
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[c627795] | 259 | installation of <command>pkg-config</command> support files.
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| 260 | </para>
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| 261 |
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| 262 | <para>
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[2800af7] | 263 | <parameter>--enable-udev_sync</parameter>: This switch enables
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[c627795] | 264 | synchronisation with <application>Udev</application> processing.
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| 265 | </para>
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| 266 |
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| 267 | <para>
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| 268 | <option>--enable-dmeventd</option>: This switch enables
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| 269 | building of the <application>Device Mapper</application>
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| 270 | event daemon.
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| 271 | </para>
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[8bc3edae] | 272 |
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| 273 | </sect2>
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| 274 |
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| 275 | <sect2 role="content">
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| 276 | <title>Contents</title>
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| 277 |
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| 278 | <segmentedlist>
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| 279 | <segtitle>Installed Programs</segtitle>
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| 280 | <segtitle>Installed Libraries</segtitle>
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[c3c56b2] | 281 | <segtitle>Installed Directories</segtitle>
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[8bc3edae] | 282 |
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| 283 | <seglistitem>
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[c627795] | 284 | <seg>
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[8ed30d52] | 285 | blkdeactivate, dmeventd (optional), dmsetup, fsadm, lvm, lvmconf,
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[13a9b259] | 286 | and lvmdump. There are also
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[09765cf] | 287 | numerous symbolic links to lvm that implement specific
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| 288 | functionalities
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[c627795] | 289 | </seg>
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| 290 | <seg>
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[422bd2c] | 291 | libdevmapper.so, liblvm2app.so, and liblvm2cmd.so; optional:
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[a037dab] | 292 | libdevmapper-event.so, libdevmapper-event-lvm2.so,
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| 293 | libdevmapper-event-lvm2mirror.so, libdevmapper-event-lvm2snapshot.so,
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[80454f5] | 294 | libdevmapper-event-lvm2raid.so, and libdevmapper-event-lvm2thin.so
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[c627795] | 295 | </seg>
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[c3c56b2] | 296 | <seg>
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[a037dab] | 297 | /etc/lvm and
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| 298 | /lib/device-mapper (optional)
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[c3c56b2] | 299 | </seg>
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[8bc3edae] | 300 | </seglistitem>
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| 301 | </segmentedlist>
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| 302 |
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| 303 | <variablelist>
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| 304 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 305 | <?dbfo list-presentation="list"?>
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[61b95ac4] | 306 |
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| 307 | <?dbhtml list-presentation="table"?>
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[8bc3edae] | 308 |
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[8ed30d52] | 309 | <varlistentry id="blkdeactivate">
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| 310 | <term><command>blkdeactivate</command></term>
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| 311 | <listitem>
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| 312 | <para>
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[422bd2c] | 313 | is a utility to deactivate block device.
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[8ed30d52] | 314 | </para>
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| 315 | <indexterm zone="lvm2 blkdeactivate">
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| 316 | <primary sortas="b-blkdeactivate">blkdeactivate</primary>
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| 317 | </indexterm>
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| 318 | </listitem>
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| 319 | </varlistentry>
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| 320 |
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[a037dab] | 321 | <varlistentry id="dmeventd">
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| 322 | <term><command>dmeventd</command></term>
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| 323 | <listitem>
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| 324 | <para>
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| 325 | (optional) is the Device Mapper event daemon.
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| 326 | </para>
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| 327 | <indexterm zone="lvm2 dmeventd">
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| 328 | <primary sortas="b-dmeventd">dmeventd</primary>
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| 329 | </indexterm>
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| 330 | </listitem>
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| 331 | </varlistentry>
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| 332 |
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[8bc3edae] | 333 | <varlistentry id="dmsetup">
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| 334 | <term><command>dmsetup</command></term>
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| 335 | <listitem>
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[c627795] | 336 | <para>
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| 337 | is a low level logical volume management tool.
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| 338 | </para>
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[8bc3edae] | 339 | <indexterm zone="lvm2 dmsetup">
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| 340 | <primary sortas="b-dmsetup">dmsetup</primary>
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| 341 | </indexterm>
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| 342 | </listitem>
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| 343 | </varlistentry>
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| 344 |
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| 345 | <varlistentry id="fsadm">
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| 346 | <term><command>fsadm</command></term>
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| 347 | <listitem>
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[c627795] | 348 | <para>
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[73fe507] | 349 | is a utility used to resize or check filesystem on a device.
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[c627795] | 350 | </para>
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[8bc3edae] | 351 | <indexterm zone="lvm2 fsadm">
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| 352 | <primary sortas="b-fsadm">fsadm</primary>
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| 353 | </indexterm>
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| 354 | </listitem>
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| 355 | </varlistentry>
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| 356 |
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| 357 | <varlistentry id="lvm">
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| 358 | <term><command>lvm</command></term>
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| 359 | <listitem>
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[c627795] | 360 | <para>
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| 361 | provides the command-line tools for <application>LVM2</application>.
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| 362 | Commands are implemented via sympolic links to this program to
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| 363 | manage physical devices (pv*), volume groups (vg*) and logical
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| 364 | volumes (lv*).
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| 365 | </para>
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[8bc3edae] | 366 | <indexterm zone="lvm2 lvm">
|
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| 367 | <primary sortas="b-lvm">lvm</primary>
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| 368 | </indexterm>
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| 369 | </listitem>
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| 370 | </varlistentry>
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| 371 |
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| 372 | <varlistentry id="lvmconf">
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| 373 | <term><command>lvmconf</command></term>
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| 374 | <listitem>
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[c627795] | 375 | <para>
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[0d7900a] | 376 | is a script that modifies the locking configuration in
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[c627795] | 377 | the <application>LVM2</application> configuration file.
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| 378 | </para>
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[8bc3edae] | 379 | <indexterm zone="lvm2 lvmconf">
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| 380 | <primary sortas="b-lvmconf">lvmconf</primary>
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| 381 | </indexterm>
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| 382 | </listitem>
|
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| 383 | </varlistentry>
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| 384 |
|
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| 385 | <varlistentry id="lvmdump">
|
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| 386 | <term><command>lvmdump</command></term>
|
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| 387 | <listitem>
|
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[c627795] | 388 | <para>
|
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| 389 | is a tool used to dump various information concerning
|
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| 390 | <application>LVM2</application>.
|
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| 391 | </para>
|
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[8bc3edae] | 392 | <indexterm zone="lvm2 lvmdump">
|
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| 393 | <primary sortas="b-lvmdump">lvmdump</primary>
|
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| 394 | </indexterm>
|
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| 395 | </listitem>
|
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| 396 | </varlistentry>
|
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| 397 |
|
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| 398 | <varlistentry id="vgimportclone">
|
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| 399 | <term><command>vgimportclone</command></term>
|
---|
| 400 | <listitem>
|
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[c627795] | 401 | <para>
|
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| 402 | is used to import a duplicated VG (e.g. hardware snapshot).
|
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| 403 | </para>
|
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[8bc3edae] | 404 | <indexterm zone="lvm2 vgimportclone">
|
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| 405 | <primary sortas="b-vgimportclone">vgimportclone</primary>
|
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| 406 | </indexterm>
|
---|
| 407 | </listitem>
|
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| 408 | </varlistentry>
|
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| 409 |
|
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| 410 | <varlistentry id="libdevmapper">
|
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| 411 | <term><filename class='libraryfile'>libdevmapper.so</filename></term>
|
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| 412 | <listitem>
|
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[c627795] | 413 | <para>
|
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| 414 | contains the <application>Device Mapper</application> API
|
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| 415 | functions.
|
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| 416 | </para>
|
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[8bc3edae] | 417 | <indexterm zone="lvm2 libdevmapper">
|
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| 418 | <primary sortas="c-libdevmapper">libdevmapper.so</primary>
|
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| 419 | </indexterm>
|
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| 420 | </listitem>
|
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| 421 | </varlistentry>
|
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| 422 |
|
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| 423 | </variablelist>
|
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| 424 |
|
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| 425 | </sect2>
|
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| 426 |
|
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| 427 | </sect1>
|
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