<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML ><HEAD ><TITLE >Creating a logical volume</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="LVM HOWTO" HREF="index.html"><LINK REL="UP" TITLE="Common Tasks" HREF="commontask.html"><LINK REL="PREVIOUS" TITLE="Removing physical volumes from a volume group" HREF="removepvsfromvg.html"><LINK REL="NEXT" TITLE="Removing a logical volume" HREF="removelv.html"></HEAD ><BODY CLASS="sect1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >LVM HOWTO</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="removepvsfromvg.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 11. Common Tasks</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="removelv.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="sect1" ><H1 CLASS="sect1" ><A NAME="createlv" ></A >11.7. Creating a logical volume</H1 ><P > To create a 1500MB linear LV named 'testlv' and its block device special '/dev/testvg/testlv': <TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><FONT COLOR="#000000" ><PRE CLASS="screen" > <B CLASS="command" ># lvcreate -L1500 -ntestlv testvg</B > </PRE ></FONT ></TD ></TR ></TABLE > </P ><P > To create a 100 LE large logical volume with 2 stripes and stripe size 4 KB. <TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><FONT COLOR="#000000" ><PRE CLASS="screen" > <B CLASS="command" ># lvcreate -i2 -I4 -l100 -nanothertestlv testvg</B > </PRE ></FONT ></TD ></TR ></TABLE > </P ><P > If you want to create an LV that uses the entire VG, use vgdisplay to find the <SPAN CLASS="QUOTE" >"Total PE"</SPAN > size, then use that when running lvcreate. <TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><FONT COLOR="#000000" ><PRE CLASS="screen" > <B CLASS="command" ># vgdisplay testvg | grep "Total PE"</B > <TT CLASS="computeroutput" >Total PE 10230</TT > <B CLASS="command" ># lvcreate -l 10230 testvg -n mylv</B > </PRE ></FONT ></TD ></TR ></TABLE > This will create an LV called <STRONG >mylv</STRONG > filling the <STRONG >testvg</STRONG > VG. </P ><P > If you want the logical volume to be allocated from a specific physical volume in the volume group, specify the PV or PVs at the end of the lvcreate command line. <TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><FONT COLOR="#000000" ><PRE CLASS="screen" > <B CLASS="command" ># lvcreate -L 1500 -ntestlv testvg /dev/sdg</B > </PRE ></FONT ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="removepvsfromvg.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="removelv.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Removing physical volumes from a volume group</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="commontask.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Removing a logical volume</TD ></TR ></TABLE ></DIV ></BODY ></HTML >