| 1 | <?xml version="1.0" encoding="UTF-8"?>
|
|---|
| 2 | <!--
|
|---|
| 3 | manpage, user manual, usage: VBoxManage modifymedium
|
|---|
| 4 |
|
|---|
| 5 | Copyright (C) 2006-2020 Oracle Corporation
|
|---|
| 6 |
|
|---|
| 7 | This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 8 | available from http://www.virtualbox.org. This file is free software;
|
|---|
| 9 | you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 10 | General Public License (GPL) as published by the Free Software
|
|---|
| 11 | Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 12 | VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 13 | hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 14 | -->
|
|---|
| 15 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
|---|
| 16 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"[
|
|---|
| 17 | <!ENTITY % all.entities SYSTEM "all-entities.ent">
|
|---|
| 18 | %all.entities;
|
|---|
| 19 | ]>
|
|---|
| 20 | <refentry id="vboxmanage-modifymedium" lang="en">
|
|---|
| 21 | <refentryinfo>
|
|---|
| 22 | <pubdate>August 2019</pubdate>
|
|---|
| 23 | <title>VBoxManage modifymedium</title>
|
|---|
| 24 | </refentryinfo>
|
|---|
| 25 |
|
|---|
| 26 | <refmeta>
|
|---|
| 27 | <refentrytitle>VBoxManage-modifymedium</refentrytitle>
|
|---|
| 28 | <manvolnum>1</manvolnum>
|
|---|
| 29 | </refmeta>
|
|---|
| 30 |
|
|---|
| 31 | <refnamediv>
|
|---|
| 32 | <refname>VBoxManage-modifymedium</refname>
|
|---|
| 33 | <refpurpose>change the characteristics of an existing disk image</refpurpose>
|
|---|
| 34 | <refclass>Oracle VM VirtualBox</refclass>
|
|---|
| 35 | </refnamediv>
|
|---|
| 36 |
|
|---|
| 37 | <refsynopsisdiv>
|
|---|
| 38 | <cmdsynopsis id="synopsis-vboxmanage-modifymedium">
|
|---|
| 39 | <!-- The 'id' is mandatory and must start with 'synopsis-'. -->
|
|---|
| 40 | <command>VBoxManage modifymedium</command>
|
|---|
| 41 | <group>
|
|---|
| 42 | <arg choice="plain">disk</arg>
|
|---|
| 43 | <arg choice="plain">dvd</arg>
|
|---|
| 44 | <arg choice="plain">floppy</arg>
|
|---|
| 45 | </group>
|
|---|
| 46 | <group choice="req">
|
|---|
| 47 | <arg choice="plain"><replaceable>uuid</replaceable></arg>
|
|---|
| 48 | <arg choice="plain"><replaceable>filename</replaceable></arg>
|
|---|
| 49 | </group>
|
|---|
| 50 | <arg>--autoreset=on | off</arg>
|
|---|
| 51 | <arg>--compact</arg>
|
|---|
| 52 | <arg>--description=<replaceable>description</replaceable></arg>
|
|---|
| 53 | <arg>--move=<replaceable>pathname</replaceable></arg>
|
|---|
| 54 | <arg>--property=<replaceable>name</replaceable>=[<replaceable>value</replaceable>]</arg>
|
|---|
| 55 | <arg>--resize=<replaceable>megabytes</replaceable> | --resizebyte=<replaceable>bytes</replaceable></arg>
|
|---|
| 56 | <arg>--setlocation=<replaceable>pathname</replaceable></arg>
|
|---|
| 57 | <arg>--type=normal | writethrough | immutable | shareable | readonly | multiattach</arg>
|
|---|
| 58 | </cmdsynopsis>
|
|---|
| 59 | </refsynopsisdiv>
|
|---|
| 60 |
|
|---|
| 61 | <refsect1>
|
|---|
| 62 | <title>Description</title>
|
|---|
| 63 | <para>
|
|---|
| 64 | The <command>VBoxManage modifymedium</command> command enables you
|
|---|
| 65 | to change the characteristics of an existing disk image.
|
|---|
| 66 | </para>
|
|---|
| 67 | <note>
|
|---|
| 68 | <para>
|
|---|
| 69 | For compatibility with earlier versions of &product-name;, you
|
|---|
| 70 | can use the <command>modifyvdi</command> and
|
|---|
| 71 | <command>modifyhd</command> commands.
|
|---|
| 72 | </para>
|
|---|
| 73 | </note>
|
|---|
| 74 | <variablelist>
|
|---|
| 75 | <varlistentry>
|
|---|
| 76 | <term>disk | dvd | floppy</term>
|
|---|
| 77 | <listitem><para>
|
|---|
| 78 | Specifies the media type of the image.
|
|---|
| 79 | </para></listitem>
|
|---|
| 80 | </varlistentry>
|
|---|
| 81 | <varlistentry>
|
|---|
| 82 | <term><replaceable>filename</replaceable></term>
|
|---|
| 83 | <listitem><para>
|
|---|
| 84 | Specifies the Universally Unique Identifier (UUID) or path
|
|---|
| 85 | name of the disk image on the host file system. You can
|
|---|
| 86 | specify the UUID only if the medium is registered. Use the
|
|---|
| 87 | <command>VBoxManage list hdds</command> command to list the
|
|---|
| 88 | registered images. You can specfy an absolute or relative
|
|---|
| 89 | path to the medium.
|
|---|
| 90 | </para></listitem>
|
|---|
| 91 | </varlistentry>
|
|---|
| 92 | <varlistentry>
|
|---|
| 93 | <term><option>--autoreset=on | off</option></term>
|
|---|
| 94 | <listitem><para>
|
|---|
| 95 | Specifies whether to automatically reset an immutable hard
|
|---|
| 96 | disk on every virtual machine (VM) startup. This option is
|
|---|
| 97 | only for immutable hard disks and the default value is
|
|---|
| 98 | <literal>on</literal>. See <xref linkend="hdimagewrites" />.
|
|---|
| 99 | </para></listitem>
|
|---|
| 100 | </varlistentry>
|
|---|
| 101 | <varlistentry>
|
|---|
| 102 | <term><option>--compact</option></term>
|
|---|
| 103 | <listitem><para>
|
|---|
| 104 | Compresses disk images by removing blocks that contain only
|
|---|
| 105 | zeroes. This option shrinks a dynamically allocated image
|
|---|
| 106 | and reduces the <emphasis>physical</emphasis> size of the
|
|---|
| 107 | image without affecting the logical size of the virtual
|
|---|
| 108 | disk.
|
|---|
| 109 | </para><para>
|
|---|
| 110 | You can use this option for base images and for differencing
|
|---|
| 111 | images that are created as part of a snapshot.
|
|---|
| 112 | </para><note>
|
|---|
| 113 | <para>
|
|---|
| 114 | Before you compress the image, you must use a suitable
|
|---|
| 115 | software tool to zero out free space in the guest system.
|
|---|
| 116 | For example:
|
|---|
| 117 | </para>
|
|---|
| 118 | <itemizedlist>
|
|---|
| 119 | <listitem><para>
|
|---|
| 120 | <emphasis role="bold">Windows guests.</emphasis> Run
|
|---|
| 121 | the <command>sdelete -z</command> command.
|
|---|
| 122 | </para></listitem>
|
|---|
| 123 | <listitem><para>
|
|---|
| 124 | <emphasis role="bold">Linux guests.</emphasis> Use the
|
|---|
| 125 | <command>zerofree</command> utility, which supports
|
|---|
| 126 | <literal>ext2</literal> and <literal>ext3</literal>
|
|---|
| 127 | file systems.
|
|---|
| 128 | </para></listitem>
|
|---|
| 129 | <listitem><para>
|
|---|
| 130 | <emphasis role="bold">Mac OS X guests.</emphasis> Use
|
|---|
| 131 | the <command>diskutil secureErase freespace 0
|
|---|
| 132 | /</command> command.
|
|---|
| 133 | </para></listitem>
|
|---|
| 134 | </itemizedlist>
|
|---|
| 135 | </note><para>
|
|---|
| 136 | Note that you can only use this option to compress VDI
|
|---|
| 137 | images. To compress non-VID images, you can zero out free
|
|---|
| 138 | blocks and then clone the disk to any other dynamically
|
|---|
| 139 | allocated format.
|
|---|
| 140 | </para></listitem>
|
|---|
| 141 | </varlistentry>
|
|---|
| 142 | <varlistentry>
|
|---|
| 143 | <term><option>--description=<replaceable>description</replaceable></option></term>
|
|---|
| 144 | <listitem><para>
|
|---|
| 145 | Specifies a text description of the medium.
|
|---|
| 146 | </para></listitem>
|
|---|
| 147 | </varlistentry>
|
|---|
| 148 | <varlistentry>
|
|---|
| 149 | <term><option>--move=<replaceable>pathname</replaceable></option></term>
|
|---|
| 150 | <listitem><para>
|
|---|
| 151 | Specifies a relative or absolute path to a medium on the
|
|---|
| 152 | host system. Use this option to relocate a medium to a
|
|---|
| 153 | different location on the host system.
|
|---|
| 154 | </para></listitem>
|
|---|
| 155 | </varlistentry>
|
|---|
| 156 | <varlistentry>
|
|---|
| 157 | <term><option>--property=<replaceable>name</replaceable>=<replaceable>value</replaceable></option></term>
|
|---|
| 158 | <listitem><para>
|
|---|
| 159 | Specifies a property name and value for the medium.
|
|---|
| 160 | </para></listitem>
|
|---|
| 161 | </varlistentry>
|
|---|
| 162 | <varlistentry>
|
|---|
| 163 | <term><option>--resize=<replaceable>size</replaceable></option></term>
|
|---|
| 164 | <listitem><para>
|
|---|
| 165 | Specifes the new capacity of an existing image in MB. You
|
|---|
| 166 | can use this option only to expand the capacity of an image.
|
|---|
| 167 | You can cannot shrink the capacity of an image.
|
|---|
| 168 | </para><para>
|
|---|
| 169 | Note that you can resize only dynamically allocated disk
|
|---|
| 170 | images that use the VDI and VHD formats. This option adjusts
|
|---|
| 171 | the <emphasis>logical</emphasis> size of a virtual disk and
|
|---|
| 172 | has only a minor affect on the physical size.
|
|---|
| 173 | </para><para>
|
|---|
| 174 | For example, if your dynamically allocated 10 GB disk is
|
|---|
| 175 | full, you can use the <option>--resize 15360</option> option
|
|---|
| 176 | to increase the capacity of the existing disk to 15 GB
|
|---|
| 177 | (15,360 MB). This operation enables you to avoid having to
|
|---|
| 178 | create a new image and copy all data from within a VM.
|
|---|
| 179 | </para><para>
|
|---|
| 180 | Note that using this option only changes the capacity of the
|
|---|
| 181 | drive. So, you might need to subsequently use a partition
|
|---|
| 182 | management tool in the guest to adjust the main partition to
|
|---|
| 183 | fill the drive.
|
|---|
| 184 | </para></listitem>
|
|---|
| 185 | </varlistentry>
|
|---|
| 186 | <varlistentry>
|
|---|
| 187 | <term><option>--resizebyte=<replaceable>size</replaceable></option></term>
|
|---|
| 188 | <listitem><para>
|
|---|
| 189 | Specifes the new capacity of an existing image in bytes.
|
|---|
| 190 | This option is similar to the <option>--resize</option>
|
|---|
| 191 | option, but you specify the size in bytes instead of
|
|---|
| 192 | megabytes.
|
|---|
| 193 | </para></listitem>
|
|---|
| 194 | </varlistentry>
|
|---|
| 195 | <varlistentry>
|
|---|
| 196 | <term><option>--setlocation=<replaceable>pathname</replaceable></option></term>
|
|---|
| 197 | <listitem><para>
|
|---|
| 198 | Specifies the new location of the medium on the host system
|
|---|
| 199 | after the medium has been moved. The path name can be
|
|---|
| 200 | relative to the current directory or be absolute to the
|
|---|
| 201 | root.
|
|---|
| 202 | </para><para>
|
|---|
| 203 | Note that the <command>VBoxManage modifymedium</command>
|
|---|
| 204 | command does not perform any sanity checks on the path name
|
|---|
| 205 | you specify. Ensure that the path name is valid.
|
|---|
| 206 | </para></listitem>
|
|---|
| 207 | </varlistentry>
|
|---|
| 208 | <varlistentry>
|
|---|
| 209 | <term><option>--type</option></term>
|
|---|
| 210 | <listitem><para>
|
|---|
| 211 | Specifies the new mode type of an existing image. Valid
|
|---|
| 212 | values are <literal>normal</literal>,
|
|---|
| 213 | <literal>immutable</literal>,
|
|---|
| 214 | <literal>writethrough</literal>,
|
|---|
| 215 | <literal>multi-attach</literal>,
|
|---|
| 216 | <literal>shareable</literal>, and
|
|---|
| 217 | <literal>readonly</literal>. For descriptions of these mode
|
|---|
| 218 | types, see <xref linkend="hdimagewrites" />.
|
|---|
| 219 | </para></listitem>
|
|---|
| 220 | </varlistentry>
|
|---|
| 221 | </variablelist>
|
|---|
| 222 | </refsect1>
|
|---|
| 223 |
|
|---|
| 224 | <refsect1>
|
|---|
| 225 | <title>Examples</title>
|
|---|
| 226 | <remark role="help-scope" condition="GLOBAL" />
|
|---|
| 227 | <para>
|
|---|
| 228 | The following command modifies the description for the disk image
|
|---|
| 229 | file called <filename>disk01.vdi</filename>.
|
|---|
| 230 | </para>
|
|---|
| 231 | <screen>$ VBoxManage modifymedium disk disk01.vdi --description "Oracle Linux 7 image"</screen>
|
|---|
| 232 | <para>
|
|---|
| 233 | The following command modifies the write mode for the disk image
|
|---|
| 234 | file called <filename>disk01.vdi</filename>.
|
|---|
| 235 | </para>
|
|---|
| 236 | <screen>$ VBoxManage modifymedium disk disk01.vdi --type writethrough</screen>
|
|---|
| 237 | </refsect1>
|
|---|
| 238 |
|
|---|
| 239 | <refsect1>
|
|---|
| 240 | <title>See Also</title>
|
|---|
| 241 | <para>
|
|---|
| 242 | <xref linkend="vboxmanage-list" />
|
|---|
| 243 | </para>
|
|---|
| 244 | </refsect1>
|
|---|
| 245 | </refentry>
|
|---|
