Your post didn't come through clearly. I have no problem using du to report the used mb and mirror used mb, which is what it is supposed to do:  ASMCMD> du Used_MB     Mirror_used_MB 44765480           89533788 ASMCMD> What are you expecting it to do? David Fitzjarrell On Thursday, October 24, 2013 12:58 AM, Milo <xueyuan.luo@xxxxxxxxx> wrote: /Ñâ+zпyглiâ^â«_РOÑD -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l