oracle11g 云迁移报错 ORA-01180: can not create datafile 1

1，今天进行oracle云迁移，履行到rman的restore database;的时候报错信息：

	RMAN> restore database;


	Starting restore at 21-MAR-16
	using channel ORA_DISK_1


	creating datafile file number=1 name=/data/oracle/powerdes/system01.dbf
	RMAN-00571: ===========================================================
	RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
	RMAN-00571: ===========================================================
	RMAN-03002: failure of restore command at 03/21/2016 20:47:09
	ORA-01180: can not create datafile 1
	ORA-01110: data file 1: "/data/oracle/powerdes/system01.dbf"


	RMAN> exit