环境：3台虚拟机 RHEL 7.3 + Oracle RAC 11.2.0.4
问题现象：RAC运行正常，ASM磁盘组Normal冗余，有failgroup整体故障，有failgroup配置错误。
温馨提示：本文并不是市场上任何一款商业的一体机产品，只是我为了学习这类分布式存储架构自己模拟的实验环境，为了区分我暂时称之为xData吧^_^。
1.问题现象确认
2.重新加入CELL01的盘
3.修改failgroup的配置
1.问题现象确认
SQL> select group_number, name, total_mb, free_mb, USABLE_FILE_MB, offline_disks, state, type from v$asm_diskgroup;
GROUP_NUMBER NAME TOTAL_MB FREE_MB USABLE_FILE_MB OFFLINE_DISKS STATE TYPE
------------ ------------------------------ ---------- ---------- -------------- ------------- ---------------------- ----------
1 CRS 2000 1170 585 0 MOUNTED NORMAL
2 DATA 40960 35652 7586 0 MOUNTED NORMAL
SQL> select group_number, disk_number, name, path, failgroup, mode_status, voting_file from v$asm_disk order by 1, 2;
GROUP_NUMBER DISK_NUMBER NAME PATH FAILGROUP MODE_STATUS VO
------------ ----------- ------------------------------ ----------------------- -------------------- -------------- --
0 0 /dev/CELL01-data2 ONLINE N
0 1 /dev/CELL01-data1 ONLINE N
0 2 /dev/CELL01-crs1 ONLINE Y
1 1 CRS_0001 /dev/CELL02-crs2 CRS_0001 ONLINE Y
1 2 CRS_0002 /dev/CELL03-crs3 CRS_0002 ONLINE Y
2 0 DATA_0000 /dev/CELL03-data1 DATA_0000 ONLINE N
2 1 DATA_0001 /dev/CELL03-data2 DATA_0001 ONLINE N
2 2 DATA_0002 /dev/CELL02-data1 CELL02 ONLINE N
2 3 DATA_0003 /dev/CELL02-data2 CELL02 ONLINE N
9 rows selected.
可以看到不但CELL01节点的所有盘被删除，而且CELL03节点的数据盘，failgroup目前也配置不正确！