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<?xml version="1.0"?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
<refentry id="re-drbdmeta">
<refentryinfo>
<date>15 Oct 2008</date>
<productname>DRBD</productname>
<productnumber>8.3.2</productnumber>
</refentryinfo>
<refmeta>
<refentrytitle>drbdmeta</refentrytitle>
<manvolnum>8</manvolnum>
<refmiscinfo class="manual">System Administration</refmiscinfo>
</refmeta>
<refnamediv>
<refname>drbdmeta</refname>
<refpurpose>DRBD's meta data management tool
<indexterm significance="normal">
<primary>drbdmeta</primary>
</indexterm>
</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis sepchar=" ">
<command moreinfo="none">drbdmeta</command>
<arg choice="opt" rep="norepeat">--force</arg>
<arg choice="opt" rep="norepeat">--ignore-sanity-checks</arg>
<arg choice="req" rep="norepeat">
<replaceable>device</replaceable>
</arg>
<group choice="req" rep="norepeat">
<arg choice="plain" rep="norepeat">v06 <replaceable>minor</replaceable></arg>
<arg choice="plain" rep="norepeat">v07 <replaceable>meta_dev index</replaceable></arg>
<arg choice="plain" rep="norepeat">v08 <replaceable>meta_dev index</replaceable></arg>
</group>
<arg choice="req" rep="norepeat">
<replaceable>command</replaceable>
</arg>
<arg choice="opt" rep="repeat">
<replaceable>cmd args</replaceable>
</arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para> Drbdmeta is used to create, display and modify the contents of
DRBD's meta data storage. Usually you do not want to use this
command directly, but start it via the frontend
<citerefentry><refentrytitle>drbdadm</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
</para>
<para> This command only works if the DRBD resource is currently down,
or at least detached from its backing storage. The first parameter
is the device node associated to the resource. With the second
parameter you can select the version of the meta data. Currently
all major DRBD releases (0.6, 0.7 and 8) are supported.
</para>
</refsect1>
<refsect1>
<title>Options</title>
<variablelist>
<varlistentry>
<term>--force</term>
<listitem>
<para><indexterm significance="normal"><primary>drbdmeta</primary><secondary>--force</secondary></indexterm>
All questions that get asked by drbdmeta are treated as if
the user answered 'yes'.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>--ignore-sanity-checks</term>
<listitem>
<para><indexterm significance="normal"><primary>drbdmeta</primary><secondary>--ignore-sanity-checks</secondary></indexterm>
Some sanity checks cause drbdmeta to terminate. E.g. if a file system image would get
destroyed by creating the meta data. By using that option you can force drbdmeta
to ignore these checks.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Commands</title>
<variablelist>
<varlistentry>
<term>create-md</term>
<listitem>
<para><indexterm significance="normal"><primary>drbdmeta</primary><secondary>create-md</secondary></indexterm>
Create-md initializes the meta data storage. This needs to be
done before a DRBD resource can be taken online for the first
time. In case there is already a meta data signature of an
older format in place, drbdmeta will ask you if it should
convert the older format to the selected format.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>get-gi</term>
<listitem>
<para><indexterm significance="normal"><primary>drbdmeta</primary><secondary>get-gi</secondary></indexterm>
Get-gi shows a short textual representation of the data generation
identifier. In version 0.6 and 0.7 these are generation counters,
while in version 8 it is a set of UUIDs.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>show-gi</term>
<listitem>
<para><indexterm significance="normal"><primary>drbdmeta</primary><secondary>show-gi</secondary></indexterm>
Show-gi prints a textual representation of the data generation
identifiers including explanatory information.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>dump-md</term>
<listitem>
<para><indexterm significance="normal"><primary>drbdmeta</primary><secondary>dump-md</secondary></indexterm>
Dumps the whole contents of the meta data storage including
the stored bit-map and activity-log in a textual representation.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>outdate</term>
<listitem>
<para><indexterm significance="normal"><primary>drbdmeta</primary><secondary>outdate</secondary></indexterm>
Sets the outdated flag in the meta data. This is used by the
peer node when it wants to become primary, but cannot
communicate with the DRBD stack on this host.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>dstate</term>
<listitem>
<para><indexterm significance="normal"><primary>drbdmeta</primary><secondary>dstate</secondary></indexterm>
Prints the state of the data on the backing storage. The output
is always followed by '/DUnknown' since drbdmeta only looks
at the local meta data.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>check-resize</term>
<listitem>
<para><indexterm significance="normal"><primary>drbdmeta</primary><secondary>check-resize</secondary></indexterm>
Examines the device size of a backing device, and it's last known device size,
recorded in a file /var/lib/drbd/drbd-minor-??.lkbd. In case the size of the
backing device changed, and the meta data can be found at the old position,
it moves the meta data to the right position at the end of the block device.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Expert's commands</title>
<para> Drbdmeta allows you to modify the meta data as well. This is
intentionally omitted for the command's usage output, since you
should only use it if you really know what you are doing.
By setting the generation identifiers to wrong values, you
risk to overwrite your up-to-data data with an older version
of your data.
</para>
<variablelist>
<varlistentry>
<term>set-gi <replaceable>gi</replaceable></term>
<listitem>
<para><indexterm significance="normal"><primary>drbdmeta</primary><secondary>set-gi </secondary></indexterm>
Set-gi allows you to set the generation identifier.
<replaceable>Gi</replaceable> needs to be a generation
counter for the 0.6 and 0.7 format, and a UUID set for 8.x.
Specify it in the same way as get-gi shows it.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>restore-md <replaceable>dump_file</replaceable></term>
<listitem>
<para><indexterm significance="normal"><primary>drbdmeta</primary><secondary>restore-md </secondary></indexterm>
Reads the <replaceable>dump_file</replaceable> and writes
it to the meta data.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Version</title>
<simpara>This document was revised for version 8.3.2 of the DRBD distribution.</simpara>
</refsect1>
<refsect1>
<title>Author</title>
<simpara>Written by Philipp Reisner <email>philipp.reisner@linbit.com</email>
and Lars Ellenberg <email>lars.ellenberg@linbit.com</email>.
</simpara>
</refsect1>
<refsect1>
<title>Reporting Bugs</title>
<simpara>Report bugs to <email>drbd-user@lists.linbit.com</email>.
</simpara>
</refsect1>
<refsect1>
<title>Copyright</title>
<simpara>Copyright 2001-2008 LINBIT Information Technologies,
Philipp Reisner, Lars Ellenberg. This is free software;
see the source for copying conditions. There is NO warranty;
not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
</simpara>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry>
<refentrytitle>drbdadm</refentrytitle>
<manvolnum>8</manvolnum>
</citerefentry>
</para>
</refsect1>
</refentry>
|
