OCR替换，先add再replace可以么?

在调换OCR的时候，须要先加一个转换磁盘组，才可以顺利转变冗余模式，但是不添加转换磁盘组呢？

先添加一个磁盘组TMP：
[root@rac1 raw]# /u01/app/11.2.0/grid/bin/ocrconfig -add TMP
PROT-30: The Oracle Cluster Registry location to be added is not accessible
[root@rac1 raw]# /u01/app/11.2.0/grid/bin/ocrconfig -add +TMP
[root@rac1 raw]# /u01/app/11.2.0/grid/bin/ocrcheck
Status of Oracle Cluster Registry is as follows :
         Version                  :          3
         Total space (kbytes)     :     262120
         Used space (kbytes)      :       2760
         Available space (kbytes) :     259360
         ID                       :  729466762
         Device/File Name         :    +OCRNEW
                                    Device/File integrity check succeeded
         Device/File Name         :       +TMP
                                    Device/File integrity check succeeded

                                    Device/File not configured

                                    Device/File not configured

                                    Device/File not configured

         Cluster registry integrity check succeeded

         Logical corruption check succeeded

然后调换：
[root@rac1 raw]# /u01/app/11.2.0/grid/bin/ocrconfig -replace +OCRNEW -replacement +TMP
PROT-29: The Oracle Cluster Registry location is already configured

表明是不可以的。
先添