ASM磁盘组删除磁盘
[[email protected] ~]$ su - gridsqlplus / as sysasmConnected.sql> alter diskgroup data drop disk data_0001;diskgroup altered.sql> select disk_number,state,name,total_mb,free_mb from v$asm_disk where group_number = 4;disK_NUMBER STATE NAME TOTAL_MB FREE_MB----------- -------- ------------------------------ ---------- ---------- 1 DROPPING DATA_0001 1953124 1950842 0 norMAL DATA_0000 1953124 1948124sql> select disk_number,free_mb from v$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 1947532sql> select disk_number,free_mb from v$asm_disk where group_number = 4;disK_NUMBER STATE NAME TOTAL_MB FREE_MB----------- -------- ------------------------------ ---------- ---------- 1 DROPPING DATA_0001 1953124 1952556 0 norMAL DATA_0000 1953124 1946410sql> select disk_number,free_mb from v$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 1945870sql> select disk_number,free_mb from v$asm_disk where group_number = 4;disK_NUMBER STATE NAME TOTAL_MB FREE_MB----------- -------- ------------------------------ ---------- ---------- 0 norMAL DATA_0000 1953124 1945854sql> select group_number,disk_number,path,free_mb 2 from v$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，虽然删除操作执行完成，但是磁盘并没有真正被删掉，ASM在后台尝试将磁盘上的数据挪到其他可用磁盘中，这时磁盘的状态为DROPPING。当后台数据同步的操作完成，磁盘的组信息被清除，磁盘恢复STATE状态。这时这个磁盘就从ASM中被彻底删除。
