Oracle11g RAC-更换存储
两个主机上分别扫描，识别到后重启多路径软件
# echo "- - -" > /sys/class/scsi_host/host7/scan
# echo "- - -" > /sys/class/scsi_host/host8/scan
# service multipathd restart
#迁移前存储信息：
磁盘名 大小 用途
/dev/mapper/asm-crs1 4GB OCR_VOTE磁盘组磁盘
/dev/mapper/asm-crs2 4GB OCR_VOTE磁盘组磁盘
/dev/mapper/asm-crs3 4GB OCR_VOTE磁盘组磁盘
/dev/mapper/asm-crs4 4GB OCR_VOTE磁盘组磁盘
/dev/mapper/asm-crs5 4GB OCR_VOTE磁盘组磁盘
/dev/mapper/asm-data1 800GB DATA数据盘
/dev/mapper/asm-data2 800GB DATA数据盘
/dev/mapper/asm-arch1 800GB FRA归档盘
/dev/mapper/asm-arch2 800GB FRA归档盘
##迁移后存储信息
磁盘名 大小 用途
/dev/mapper/new-crs1 4GB OCR_VOTE磁盘组磁盘
/dev/mapper/new-crs2 4GB OCR_VOTE磁盘组磁盘
/dev/mapper/new-crs3 4GB OCR_VOTE磁盘组磁盘
/dev/mapper/new-crs4 4GB OCR_VOTE磁盘组磁盘
/dev/mapper/new-crs5 4GB OCR_VOTE磁盘组磁盘
/dev/mapper/new-data1 800GB DATA数据盘
/dev/mapper/new-data2 800GB DATA数据盘
/dev/mapper/new-arch1 800GB FRA归档盘
/dev/mapper/new-arch2 800GB FRA归档盘
##迁移步骤
更换OCR磁盘
root用户执行
#ocrconfig -add +NEWCRS
#ocrconfig -delete +CRS
##更换VOTE DISK
root用户执行
#crsctl replace votedisk +NEWCRS
##更换DATA、FRA磁盘组
DATA磁盘组的更换与磁盘组的更换方式相同，以DATA磁盘组更换为例：
grid用户在ASM实例中执行：
SQL> alter diskgroup FRA add disk '/dev/mapper/new-arch1' name FRA_NEW01 rebalance power 5;
SQL> alter diskgroup FRA add disk '/dev/mapper/new-arch2' name FRA_NEW02 rebalance power 5;
SQL> alter diskgroup FRA drop disk FRA_0001 rebalance power 3;
SQL> alter diskgroup FRA drop disk FRA_0000 rebalance power 3;
SQL> alter diskgroup DATA add disk '/dev/mapper/new-data1' name DATA_NEW01 rebalance power 5;
SQL> alter diskgroup DATA add disk '/dev/mapper/new-data2' name DATA_NEW02 rebalance power 5;
SQL> alter diskgroup DATA drop disk DATA_0000 rebalance power 3;
SQL> alter diskgroup DATA drop disk DATA_0001 rebalance power 3;