One of the disk in my ASM diskgroup is in the hung state. The diskgroup is
mounted though it shows that one of its disk is offline and the database is
running and accesible.
More info:
+ASM1> select name, state, disk_number from v$asm_disk;
NAME STATE DISK_NUMBER
------------------------------ -------- -----------
NORMAL 0
ORCL_DATA_0000 NORMAL 0
ORCL_DATA_0001 HUNG 1
FLASH_RECOVERY_AREA_0000 NORMAL 0
+ASM1> select name, state, offline_disks from v$asm_diskgroup;
NAME STATE OFFLINE_DISKS
------------------------------ ----------- -------------
FLASH_RECOVERY_AREA MOUNTED 0
ORCL_DATA MOUNTED 1
产生的原因：
现在磁盘剩余的空间小于踢出去的磁盘已经使用的空间
所以，只要保证剩余空间大于所要踢出去的磁盘已经使用的空间就没问题
解决办法：
添加磁盘
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