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<?xml version="1.0" encoding="EUC-JP"?>
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<sect3 id="partman-lvm">
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<title>Configuring the Logical Volume Manager (LVM)</title>
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<title>�����ܥ�塼��ޥ͡����� (LVM) ������</title>
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If you are working with computers at the level of system administrator
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or <quote>advanced</quote> user, you have surely seen the situation
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where some disk partition (usually the most important one) was short on
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space, while some other partition was grossly underused and you had to
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manage this situation with moving stuff around, symlinking, etc.
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�����ƥ�����Ԥ�<quote>���</quote>�桼���Ȥ��ƥ���ԥ塼����ư�����Ƥ���ȡ�
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�ǥ�������Τ���ѡ��ƥ������ (�����Ƥ��Ǥ���פʤ��) ����ʤ��ʤꡢ
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¾�Υѡ��ƥ�����������Ū�ˤ��ޤ���Ѥ���Ƥ��ʤ��Ȥ����������μ¤ˤ���ޤ���
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���Ƥ��ư�����ꥷ��ܥ�å����ĥ��Ȥ��ä�������Ԥ����Ȥˤʤ�ޤ���
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To avoid the described situation you can use Logical Volume Manager
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(LVM). Simply said, with LVM you can combine your partitions
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(<firstterm>physical volumes</firstterm> in LVM lingo) to form
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a virtual disk (so called <firstterm>volume group</firstterm>), which
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can then be divided into virtual partitions (<firstterm>logical
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volumes</firstterm>). The point is that logical volumes (and of course
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underlying volume groups) can span across several physical disks.
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�嵭�Τ褦�ʾ������뤿��ˡ������ܥ�塼��ޥ͡����� (LVM) �����ѤǤ��ޤ���
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��ñ�˸����ȡ�LVM �Ǥ�ʣ���Υѡ��ƥ������
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(LVM �Ѹ�� <firstterm>ʪ���ܥ�塼�� (physical volumes)</firstterm>)
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���ۥǥ������η��˷��Ǥ������Υǥ��������ۥѡ��ƥ������
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(<firstterm>�����ܥ�塼�� (logical volumes)</firstterm>) ��ʬ��Ǥ��ޤ���
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�ݥ���Ȥϡ������ܥ�塼��� (������β��Υܥ�塼�॰�롼�פ�)��
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ʣ����ʪ���ǥ�������ޤ����ä�����Ǥ���ȸ������ȤǤ���
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Now when you realize you need more space for your old 160GB
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<filename>/home</filename> partition, you can simply add a new 300GB
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disk to the computer, join it with your existing volume group and then
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resize the logical volume which holds your <filename>/home</filename>
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filesystem and voila — your users have some room again on their
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renewed 460GB partition. This example is of course a bit
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oversimplified. If you haven't read it yet, you should consult the
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<ulink url="&url-lvm-howto;">LVM HOWTO</ulink>.
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�㤨�С��Ť� 160GB ��<filename>/home</filename> �ѡ��ƥ������ˡ�
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��ä����̤��ɲä��뤳�Ȥ�ͤ��ޤ���
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ñ�ˤ��ʤ��Ͽ����� 300GB �Υǥ�������ԥ塼�����ɲä���
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��¸�Υܥ�塼�॰�롼�פ�����ޤ���
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���θ� <filename>/home</filename> �ե����륷���ƥ���ݻ������ޤ�
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�����ܥ�塼���ꥵ�������ޤ���
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����Ȥۤ顢�ѡ��ƥ������ 460GB �ؤȿ��ʸ��줿�Τǡ�
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�桼���ζ������̤��������Ф������������Ȥˤʤ�ޤ���
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���������Ͼ���ñ��ˤ������Ǥ���
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<ulink url="&url-lvm-howto;">LVM HOWTO</ulink> ��Ĵ�٤�٤��Ǥ���
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LVM setup in &d-i; is quite simple and completely supported inside
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<command>partman</command>. First, you have to mark the partition(s)
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to be used as physical volumes for LVM. This is done in the
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<guimenu>Partition settings</guimenu> menu where you should select
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<menuchoice> <guimenu>Use as:</guimenu> <guimenuitem>physical volume
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for LVM</guimenuitem> </menuchoice>.
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&d-i; �Ǥ� LVM �Υ��åȥ��åפϤ��ʤꥷ��ץ�ǡ�
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<command>partman</command> �����Ǵ����˥��ݡ��Ȥ��Ƥ��ޤ���
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�Ϥ�ˡ��ѡ��ƥ������� LVM ��ʪ���ܥ�塼��Ȥ��ƻ��Ѥ���褦��
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����ϡ�<guimenu>�ѡ��ƥ����������</guimenu> ��˥塼��
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<command>partman</command> ���
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<menuchoice> <guimenu>������ˡ:</guimenu> <guimenuitem>LVM
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��ʪ���ܥ�塼��</guimenuitem> </menuchoice> �����֤��ȤǹԤ��ޤ�
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When you return to the main <command>partman</command> screen, you will see
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a new option <guimenuitem>Configure the Logical Volume Manager</guimenuitem>.
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When you select that, you will first be asked to confirm pending changes to
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the partition table (if any) and after that the LVM configuration menu will
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be shown. Above the menu a summary of the LVM configuration is shown. The
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menu itself is context sensitive and only shows valid actions. The possible
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�ᥤ��� <command>partman</command> ���̤����ȡ�
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<guimenuitem>�����ܥ�塼��ޥ͡����������</guimenuitem>
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������������Ǥ���褦�ˤʤäƤ��ޤ���
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���������ȡ��ޤ����ꤷ�Ƥ��ʤ��ѡ��ƥ������ơ��֥�ؤ��ѹ� (�������)
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��ǧ��Ԥ������θ� LVM �����˥塼��ɽ�����ޤ���
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��˥塼�ξ����ˤ� LVM ����γ��פ�ɽ�����ޤ���
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��˥塼���ΤϤ��ΤȤ��˼¹ԤǤ������Τ�ɽ�����ޤ���
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<guimenuitem>Display configuration details</guimenuitem>:
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shows LVM device structure, names and sizes of logical volumes and more
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<guimenuitem>����ξܺ�ɽ��</guimenuitem>:
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LVM �ǥХ����ι�¤�������ܥ�塼���̾�Τ䥵�����ʤɤ�ɽ�����ޤ�
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<guimenuitem>Create volume group</guimenuitem>
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<guimenuitem>�ܥ�塼�॰�롼�פκ���</guimenuitem>
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<guimenuitem>Create logical volume</guimenuitem>
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<guimenuitem>�����ܥ�塼��κ���</guimenuitem>
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<guimenuitem>Delete volume group</guimenuitem>
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<guimenuitem>�ܥ�塼�॰�롼�פκ��</guimenuitem>
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<guimenuitem>Delete logical volume</guimenuitem>
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<guimenuitem>�����ܥ�塼��κ��</guimenuitem>
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<guimenuitem>Extend volume group</guimenuitem>
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<guimenuitem>�ܥ�塼�॰�롼�פγ�ĥ</guimenuitem>
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<guimenuitem>Reduce volume group</guimenuitem>
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<guimenuitem>�ܥ�塼�॰�롼�פν̾�</guimenuitem>
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<guimenuitem>Finish</guimenuitem>:
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return to the main <command>partman</command> screen
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<guimenuitem>��λ</guimenuitem>:
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�ᥤ��� <command>partman</command> ���̤����ޤ�
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Use the options in that menu to first create a volume group and then create
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your logical volumes inside it.
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�Ϥ���˥ܥ�塼�॰�롼�פ��������������������ܥ�塼����������Τˡ�
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���Υ�˥塼�Υ��ץ�������Ѥ��Ƥ���������
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After you return to the main <command>partman</command> screen, any created
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logical volumes will be displayed in the same way as ordinary partitions
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(and you should treat them as such).
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�ᥤ��� <command>partman</command> ���̤����ȡ�
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�������������ܥ�塼�ब�̾�Υܥ�塼���Ʊ���褦��ɽ������Ƥ��ޤ���
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(������Ʊ���褦�˰����ޤ�)