asm 磁盘组，更改磁盘大小

参考：Doc ID 470209.1

#The present document shows an example to resize the ASM disks on 10.2 version

1,建议备份数据库

2，关闭数据库

3，dismount磁盘组

SQL> alter diskgroup dismount;

4，硬件层面disk/LUN resize

5,mount磁盘组

SQL> alter diskgroup mount;

6，重新resize磁盘大小

SQL> ALTER DISKGROUP RESIZE DISK M REBALANCE POWER <1-11>;
SQL> ALTER DISKGROUP DATA RESIZE DISK DISK_A1 SIZE 5000 M REBALANCE POWER 11;