private/xml/fetchCloudServerVolume.xml

<fetch>
  <entity name="mw_cloudservervolume">
    <attribute name="mw_size" />
    <attribute name="mw_cloudservervolumeid" />
    <attribute name="mw_cloudstorageid" />
    <attribute name="mw_driveletter" />
    <attribute name="mw_description" />
    <attribute name="mw_type" />
    <attribute name="mw_numberofdisks" />
    <attribute name="mw_diskid" />
    <attribute name="mw_cloudserverid" />
    <attribute name="mw_name" />
    <filter type="and">
      <filter type="or">
        <condition attribute="mw_name" operator="eq" value="system" />
      </filter>
    </filter>
  </entity>
</fetch>