260 lines
3.7 KiB
HTML
260 lines
3.7 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML
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><HEAD
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><TITLE
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>Creating a logical volume</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="LVM HOWTO"
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HREF="index.html"><LINK
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TITLE="Common Tasks"
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HREF="commontask.html"><LINK
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REL="PREVIOUS"
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TITLE="Removing physical volumes from a volume group"
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HREF="removepvsfromvg.html"><LINK
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REL="NEXT"
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TITLE="Removing a logical volume"
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HREF="removelv.html"></HEAD
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>LVM HOWTO</TH
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WIDTH="10%"
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ALIGN="left"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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VALIGN="bottom"
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>Chapter 11. Common Tasks</TD
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ALIGN="right"
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VALIGN="bottom"
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><DIV
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CLASS="sect1"
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><H1
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CLASS="sect1"
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><A
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NAME="createlv"
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></A
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>11.7. Creating a logical volume</H1
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><P
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> To create a 1500MB linear LV named 'testlv' and its block
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device special '/dev/testvg/testlv':
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<TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><FONT
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COLOR="#000000"
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><PRE
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CLASS="screen"
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> <B
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CLASS="command"
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># lvcreate -L1500 -ntestlv testvg</B
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>
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</PRE
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></FONT
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></TD
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></TR
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></TABLE
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>
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</P
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><P
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> To create a 100 LE large logical volume with 2 stripes and
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stripe size 4 KB.
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<TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><FONT
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COLOR="#000000"
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><PRE
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CLASS="screen"
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> <B
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CLASS="command"
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># lvcreate -i2 -I4 -l100 -nanothertestlv testvg</B
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>
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</PRE
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></FONT
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></TD
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></TR
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></TABLE
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>
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</P
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><P
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> If you want to create an LV that uses the entire VG, use vgdisplay
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to find the <SPAN
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CLASS="QUOTE"
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>"Total PE"</SPAN
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> size, then use that when
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running lvcreate.
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<TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><FONT
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COLOR="#000000"
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><PRE
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CLASS="screen"
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> <B
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CLASS="command"
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># vgdisplay testvg | grep "Total PE"</B
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>
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<TT
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CLASS="computeroutput"
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>Total PE 10230</TT
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>
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<B
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CLASS="command"
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># lvcreate -l 10230 testvg -n mylv</B
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>
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</PRE
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></FONT
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></TD
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></TR
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></TABLE
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>
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This will create an LV called
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<STRONG
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>mylv</STRONG
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> filling the
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<STRONG
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>testvg</STRONG
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> VG.
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</P
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><P
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> If you want the logical volume to be allocated from a specific
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physical volume in the volume group, specify the PV or PVs at
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the end of the lvcreate command line.
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<TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><FONT
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COLOR="#000000"
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><PRE
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CLASS="screen"
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> <B
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CLASS="command"
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># lvcreate -L 1500 -ntestlv testvg /dev/sdg</B
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>
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</PRE
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></FONT
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></TD
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></TR
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></TABLE
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>
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</P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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HREF="removepvsfromvg.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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HREF="index.html"
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>Home</A
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HREF="removelv.html"
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>Next</A
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>Removing physical volumes from a volume group</TD
|
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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HREF="commontask.html"
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>Up</A
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ALIGN="right"
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VALIGN="top"
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>Removing a logical volume</TD
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></TR
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> |