<div class="content" name="CprepDiskIsOnline" uuid="d14cb154-cc8f-473f-a6f1-ec5d72b41dc8"><p>The <b>CprepDiskIsOnline</b> method reports whether the <b>ClusPrepDisk</b>,
identified by the <i>DiskId</i> parameter, has <b>ClusPrepDisk.OnlineState</b>
equal to Online.</p><dl>
<dd>
<div><pre> HRESULT CprepDiskIsOnline(
   [in] CPREP_DISKID DiskId
 );
</pre></div>
</dd></dl><p><b>DiskId: </b>The identifier representing the <b>ClusPrepDisk</b>.</p><p><b>Return Values: </b> A signed 32-bit value that
indicates return status. If the method returns a negative value, it has failed.
Zero or positive values indicate success, with the lower 16 bits in positive
nonzero values containing warnings or flags defined in the method
implementation. For more information about Win32 error codes and <span><a href="../ms-dtyp/a9046ed2-bfb2-4d56-a719-2824afce59ac" data-linktype="relative-path">HRESULT</a></span>
values, see <span><a href="../ms-erref/1bc92ddf-b79e-413c-bbaa-99a5281a6c90" data-linktype="relative-path">[MS-ERREF]</a></span>
sections <span><a href="../ms-erref/18d8fbe8-a967-4f1c-ae50-99ca8e491d2d" data-linktype="relative-path">2.2</a></span>
and <span><a href="../ms-erref/0642cb2f-2075-4469-918c-4441e69c548a" data-linktype="relative-path">2.1</a></span>.</p><dl>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Return value/code</p>
   </th>
   <th>
   <p>Description</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>0x00000000 S_OK</td>
  <td>The call was successful and ClusPrepDisk.OnlineState is equal to Online.</td>
 </tr><tr>
  <td>0x80070015 ERROR_NOT_READY</td>
  <td>ClusPrepDisk.OnlineState is not equal to Online.</td>
 </tr><tr>
  <td>0x80070548 ERROR_INVALID_SERVER_STATE</td>
  <td>The server&#39;s Prepare State is not Online.</td>
 </tr></tbody></table>
</dd>
<dd>
<p>For any other condition, this method MUST return a
value that is not one of the values listed in the preceding table. The client
MUST behave in one consistent, identical manner for all values that are not
listed in the preceding table.</p>
</dd></dl><p>Exceptions Thrown: No exceptions are thrown beyond those
thrown by the underlying RPC protocol <span><a href="../ms-rpce/290c38b1-92fe-4229-91e6-4fc376610c15" data-linktype="relative-path">[MS-RPCE]</a></span>.</p><p>The opnum field value for this method is 34.</p><p>When processing this call, the server MUST do the following:</p><ul><li><p><span><span> 
</span></span>Obtain the <b>ClusPrepDisk</b> identified by the <i>DiskId</i>
parameter as specified in section <span><a href="c17ce220-d244-45c9-95c0-4c31942253ee" data-linktype="relative-path">3.2.4</a></span>.</p>
</li><li><p><span><span> 
</span></span>Return S_OK if the <b>ClusPrepDisk.OnlineState</b> is Online or
ERROR_NOT_READY if the <b>ClusPrepDisk.OnlineState</b> is Not Online state.</p>
</li></ul></div>