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<H1><IMG height=28 alt="Controller tree object" src="images/l_logdr.gif"
width=28 align=left border=0 NOSAVE>Changing the write-cache mode on a logical device</H1>

<p> <img src="images/hstraid1.gif" width="37" height="32">
  &nbsp;This action is not supported on HostRAID controllers.
<p>
Use this action to change the write-cache mode setting of a logical device
  to write through or write back. The write-cache mode determines if the
  controller writes data to the drive before or after sending a confirmation to
  the operating system.
  <p>
  <B><IMG height=17 src="images/note.gif"
width=15></B> <STRONG>Note:</STRONG> (RAID level-x0 only) All logical devices in
a spanned pool must be either write back or write through. That is, the
write-cache mode settings for the logical devices in the spanned pool
<B>cannot</B> be a mixture of write back and write through. </p>
<OL>
  <LI>In the <A href="cusegui4.htm">Logical devices view</A>, click<IMG height=20
  alt="Controller" src="images/s_logdr1.gif" width=28 align=absBottom>(logical
  drive).<BR><BR>
   <LI>Right-click <B>Configure write cache <img src="images/menuarow.gif" width="46" height="10">
      Enabled (write-back)</b> or <b>Disabled (write-through)</b>.<BR>
    <BR>
  <LI>Click <B>Yes</B> to confirm.</LI>
  </OL>
<H2>More information</H2>
<UL>
  <LI><A href="cwrcache.htm">Understanding write-cache mode for logical devices</A> </LI></UL>
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<P align=right>x-0325-HSM-00-08-EN </P>

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