ASM磁盤組刪除磁盤

[oracle@dbserver1 ~]$ su - grid
sqlplus / as sysasm
Connected.
SQL> alter diskgroup data drop disk data_0001;
Diskgroup altered.
SQL> select disk_number, state, name, total_mb, free_mb from v$asm_disk where group_number = 4;
DISK_NUMBER STATE NAME TOTAL_MB FREE_MB
----------- -------- ------------------------------ ---------- ----------
1 DROPPING DATA_0001 1953124 1950842
0 NORMAL DATA_0000 1953124 1948124
SQL> select disk_number, state, name, total_mb, free_mb from v$asm_disk where group_number = 4;
DISK_NUMBER STATE NAME TOTAL_MB FREE_MB
----------- -------- ------------------------------ ---------- ----------
1 DROPPING DATA_0001 1953124 1951434
0 NORMAL DATA_0000 1953124 1947532
SQL> select disk_number, state, name, total_mb, free_mb from v$asm_disk where group_number = 4;
DISK_NUMBER STATE NAME TOTAL_MB FREE_MB
----------- -------- ------------------------------ ---------- ----------
1 DROPPING DATA_0001 1953124 1952556
0 NORMAL DATA_0000 1953124 1946410
SQL> select disk_number, state, name, total_mb, free_mb from v$asm_disk where group_number = 4;
DISK_NUMBER STATE NAME TOTAL_MB FREE_MB
----------- -------- ------------------------------ ---------- ----------
1 DROPPING DATA_0001 1953124 1953096
0 NORMAL DATA_0000 1953124 1945870
SQL> select disk_number, state, name, total_mb, free_mb from v$asm_disk where group_number = 4;
DISK_NUMBER STATE NAME TOTAL_MB FREE_MB
----------- -------- ------------------------------ ---------- ----------
0 NORMAL DATA_0000 1953124 1945854
SQL> select group_number, disk_number, path, name, state, total_mb, free_mb
2 from v$asm_disk
3 where path = ‘/dev/asm-disk5‘;
GROUP_NUMBER DISK_NUMBER PATH NAME STATE TOTAL_MB FREE_MB
------------ ----------- --------------- ---------- -------- ---------- ----------
0 1 /dev/asm-disk5 NORMAL 0 0
可以看到，雖然刪除操作執行完成，但是磁盤並沒有真正被刪掉，ASM在後臺嘗試將磁盤上的數據挪到其他可用磁盤中，這時磁盤的狀態為DROPPING。
當後臺數據同步的操作完成，磁盤的組信息被清除，磁盤恢復STATE狀態。這時這個磁盤就從ASM中被徹底刪除。

ASM磁盤組刪除磁盤