归档日志磁盘组dismounted

--一定要使用grid
[root@rac1 ~]# su - grid
[rac1:grid]:/home/grid>sqlplus / as sysasm

SQL> select name,state from v$asm_diskgroup;

NAME			       STATE
------------------------------ -----------
SYSDG			       MOUNTED
ARCHDG			       DISMOUNTED
DATADG			       MOUNTED

SQL> alter diskgroup ARCHDG mount;

Diskgroup altered.

SQL> select name,state from v$asm_diskgroup;

NAME			       STATE
------------------------------ -----------
SYSDG			       MOUNTED
ARCHDG			       MOUNTED
DATADG			       MOUNTED

SQL>