Oracle数据库实例中查询V$asm_disk磁盘头信息为unknown

SQL> select group_number, name, state, total_mb, free_mb from v$asm_diskgroup;
GROUP_NUMBER NAME STATE TOTAL_MB FREE_MB
------------ ------------------------------ ----------- ---------- ----------
1 DGDATA01 CONNECTED 1024000 981822
3 DGRECOVER MOUNTED 409600 407832
SQL>
SQL> select group_number, disk_number, mount_status, header_status, name, path from v$asm_disk;
GROUP_NUMBER DISK_NUMBER MOUNT_S HEADER_STATU NAME
------------ ----------- ------- ------------ ------------------------------
PATH
--------------------------------------------------------------------------------
1 0 OPENED UNKNOWN DGDATA01_0000
/dev/rhdiskpower10
1 1 OPENED UNKNOWN DGDATA01_0001
/dev/rhdiskpower11
1 2 OPENED UNKNOWN DGDATA01_0002
/dev/rhdiskpower12

GROUP_NUMBER DISK_NUMBER MOUNT_S HEADER_STATU NAME
------------ ----------- ------- ------------ ------------------------------
PATH
--------------------------------------------------------------------------------
1 3 OPENED UNKNOWN DGDATA01_0003
/dev/rhdiskpower8
1 4 OPENED UNKNOWN DGDATA01_0004
/dev/rhdiskpower9

进入到asm实例中，查询v$asm_diskgroup磁盘组中的状态为mounted,查询v$asm_disk中的header_status为member --这个正确

SQL> select group_number, name, state, total_mb, free_mb from v$asm_diskgroup;
GROUP_NUMBER NAME STATE TOTAL_MB FREE_MB
------------ ------------------------------ ----------- ---------- ----------
1 DGDATA01 MOUNTED 1024000 981822
3 DGRECOVER MOUNTED 409600 407832
SQL>
SQL> select group_number, disk_number, mount_status, header_status, name, path from v$asm_disk;
GROUP_NUMBER DISK_NUMBER MOUNT_S HEADER_STATU NAME
------------ ----------- ------- ------------ ------------------------------
PATH
--------------------------------------------------------------------------------
1 0 OPENED MEMBER DGDATA01_0000
/dev/rhdiskpower10
1 1 OPENED MEMBER DGDATA01_0001
/dev/rhdiskpower11
1 2 OPENED MEMBER DGDATA01_0002
/dev/rhdiskpower12

GROUP_NUMBER DISK_NUMBER MOUNT_S HEADER_STATU NAME
------------ ----------- ------- ------------ ------------------------------
PATH
--------------------------------------------------------------------------------
1 3 OPENED MEMBER DGDATA01_0003
/dev/rhdiskpower8
1 4 OPENED MEMBER DGDATA01_0004
/dev/rhdiskpower9