oracle 10g rac rman transport tablespace rman-06034

环境 aix oracle 10.2.0.4 rac 两节点，备份在带库中，现在要做表空间迁移，rman语句如下
run{
allocate channel ch00 type 'sbt_type' connect xxxxxx@orcl1;
allocate channel ch02 type 'sbt_type' connect xxxxxx@orcl2;
transport tablespace users 
tablespace destination '/arch'
auxiliary destination '/arch'
until time "to_date('2012-10-12 08:00:00','yyyy-mm-dd hh24:mi:ss')";
}
日志：
RMAN> run {
2> ALLOCATE CHANNEL ch00 TYPE 'SBT_TAPE' connect xxxxx@orcl1';
3> ALLOCATE CHANNEL ch01 TYPE 'SBT_TAPE' connect xxxxxx@orcl2';
4> transport tablespace users
5> tablespace destination '/arch'
6> auxiliary destination '/arch'
7> until time "to_date('2012-10-12 08:00:00','yyyy-mm-dd hh24:mi:ss')";
8> }
allocated channel: ch00
channel ch00: sid=232 instance=orcl1 devtype=SBT_TAPE