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<title>Choosing the RAID Level </title>

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<h1> Choosing
  the RAID Level</h1>
<p> Complete the following steps to choose the RAID level for the logical device:<br>
<ol>
  <li>Click the <strong>RAID level</strong> radio button to choose the RAID level
    for the logical device. Only the most common choices appear in the list.<br>
    <img src="images/wrlvl1cc.gif" width="488" height="99"><br>
    <br>
  </li>
  <li>To choose a different RAID level, click <strong>Advanced settings</strong>;
    then, choose a RAID level from the available options:<br>
    <img src="images/wrlvl2cc.gif" width="152" height="199" vspace="7" border="0"> <br>
In addition to <a href="craid1e.htm">RAID Level-1E</a>, <a href="craid5ee.htm">5EE</a>, <a href="craid6.htm">6</a> and <a href="craidx0.htm">x0</a>, the HP Storage Manager supports the following RAID types:<br>
    </p>
  </li>
  <ul>
    <li><strong>Simple Volume</strong> - a single disk drive or <a href="gsegment.htm">segment</a>;
      not redundant.<br>
      <br>
    </li>
    <li><strong>Spanned Volume</strong> - two or more disk drives or <a href="gsegment.htm">segments</a>
      with the same or different capacity, connected end-to-end. A spanned volume
      offers no redundancy or performance advantage over a single drive.<br>
  <p>
    <img src="images/hstraid1.gif" width="37" height="32">&nbsp;HostRAID controllers do <strong>not</strong> support Spanned volumes or RAID volumes.<br>
  </p>

    </li>
    <li><strong>RAID Volume</strong> - two or more logical devices with the same
      RAID level, connected end-to-end. The logical devices may have the same or
      different capacity and are <strong>not</strong> <a href="cstripe.htm">striped</a>
      together; they may be redundant, depending on the RAID level.<br>
      <br>

      <b><img src="images/note.gif" width="15" height="17"> Notes</b>:
<ol><li>

      You must create the individual logical devices before you create a RAID Volume. Use
      the Configuration wizard to create the logical drives; then, run the Configuration
      wizard again to create the RAID Volume.</li><br>
      <li>When you create a RAID Volume, the HP Storage Manager replaces the individual logical devices with a single RAID Volume icon in
      the Logical devices view; then, it reports the logical devices as deleted in the event viewer.
      The event message is normal and does not indicate a loss of data.

      </li></ol>
    </li>
  </ul>
  <li>When you are ready to continue, click <strong>Next</strong>. The &quot;<a href="wcfgldcc.htm">Create
    logical devices</a>&quot; window opens.<br>
  </li>
</ol>
<h2>More information</h2>

<ul>
  <li><a href="craidint.htm">Understanding RAID technology</a></li>
  <li><a href="cstripe.htm">Understanding stripe size</a></li>
  <li><a href="cusable.htm">Understanding usable capacity and unusable
    capacity</a></li>
</ul>

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