<div class="content" name="CprepDiskDiskPartitionIsNtfs" uuid="3d106579-fe4e-43bf-b1cb-5ba7b65ae460"><p>The <b>CprepDiskDiskPartitionIsNtfs</b> method determines
whether the file system on a given partition on a given disk is NTFS.</p><dl>
<dd>
<div><pre> HRESULT CprepDiskDiskPartitionIsNtfs(
   [in] CPREP_DISKID DiskId,
   [in] unsigned long ulPartition
 );
</pre></div>
</dd></dl><p><b>DiskId: </b>The identifier of the <b>ClusPrepDisk</b>
representing the disk.</p><p><b>ulPartition: </b>The partition number of the
partition associated with the volume to query for file system information.</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.</td>
 </tr><tr>
  <td>0x80070022 ERROR_WRONG_DISK</td>
  <td>The partition on the disk has a file system other than NTFS.</td>
 </tr><tr>
  <td>0x8007139F ERROR_INVALID_STATE</td>
  <td>The ClusPrepDisk.OnlineState value is not equal to Online.</td>
 </tr><tr>
  <td>0x80070002 ERROR_FILE_NOT_FOUND</td>
  <td>The disk was not found or ulPartition cannot be mapped to a volume.</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 29.</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>Verify that the <b>ClusPrepDisk.OnlineState</b> is Online as
specified in section 3.2.4.</p>
</li><li><p><span><span> 
</span></span>Map <i>ulPartition</i> to the corresponding volume as specified
in section 3.2.4.</p>
</li><li><p><span><span> 
</span></span>Return ERROR_WRONG_DISK if <span><a href="2fa9081e-a0fb-4263-89ba-bc67afc0c17c" data-linktype="relative-path">CprepDiskGetFSName</a></span>
would return any file system name other than &#34;NTFS&#34;.</p>
</li><li><p><span><span> 
</span></span>Return S_OK if CprepDiskGetFSName would return &#34;NTFS&#34;.</p>
</li></ul></div>