oracle更改db_recovery_file_dest路径

SQL> show parameter DB_RECOVERY_FILE_DEST
NAME     TYPE VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest     string /u01/oracle/fast_recovery_area
db_recovery_file_dest_size     big integer 4122M
SQL> ALTER SYSTEM SET db_recovery_file_dest_size=3g SCOPE=BOTH;
System altered.
SQL> ALTER SYSTEM SET db_recovery_file_dest='/u01/oracle/fast' SCOPE=BOTH;
System altered.
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount
ORACLE instance started.
Total System Global Area 1603411968 bytes
Fixed Size    2228784 bytes
Variable Size  989859280 bytes
Database Buffers  603979776 bytes
Redo Buffers    7344128 bytes
Database mounted.
SQL> ALTER DATABASE FLASHBACK OFF;
Database altered.
SQL> ALTER DATABASE FLASHBACK ON;
Database altered.
SQL> alter database open;
Database altered.
SQL> show parameter DB_RECOVERY_FILE_DEST
NAME     TYPE VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest     string /u01/oracle/fast
db_recovery_file_dest_size     big integer 3G