11gR2_RAC现有磁盘组添加磁盘

1、AIX系统添加两块硬盘hdisk17,hdisk18，并进行配置。

1)给磁盘分配pvid

外部存储设备中的同一块硬盘在不同节点上的名称可能会不同。同一个硬盘在节点一中的名称可能是hdisk4，在节点二中的名称可能是hdisk5.虽然ASM实例能正确识别这样的硬盘，但对于管理员来说可能会产生歧义。不管怎样，这块硬盘有一个不变的属性是PVID，无论在节点一还是节点二下都是一样的。通过下面的命令可以产生硬盘的PVID

chdev -l hdisk17 -a pv=yes

chdev -l hdisk18 -a pv=yes

2)修改磁盘权限

本项目使用ASM，需要指定ASM磁盘中所要包含的磁盘，并保证grid用户有对这些磁盘的写权限

修改磁盘属组

chown grid:asmadmin /dev/rhdisk17

chown grid:asmadmin /dev/rhdisk18

修改磁盘权限

chmod 660 /dev/rhdisk17

chmod 660 /dev/rhdisk18

3)检查磁盘属性

有些型号的存储设别具有reserve_lock或者reserve_policy属性，这两个属性的存在会阻止多个节点对存储设备进行并行读写，所以在安装集群软件之前应该对其属性进行修改。

lsattr -E -l hdisk17|grep reserve_

lsattr -E -l hdisk18|grep reserve_

4)设置磁盘属性为reserve_lock=no或reserve_policy=no_reserve

chdev -l hdisk17 -a reserve_policy=no_reserve

chdev -l hdisk18 -a reserve_policy=no_reserve

5)清除磁盘pvid

通过PVID可以在不同节点中对比、确认同一块硬盘，但是在安装集群软件之前应该在每个节点上将PVID清除掉，否则在安装过程中可能会出现错误。

chdev -l hdisk17 -a pv=clear

chdev -l hdisk18 -a pv=clear

2、现有磁盘组添加磁盘。

#su - grid

$ sqlplus / as sysasm

SQL*Plus: Release 11.2.0.4.0 Production on Fri May 5 10:44:30 2017

Copyright (c) 1982, 2013, Oracle. All rights reserved.

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Real Application Clusters and Automatic Storage Management options

SQL> select GROUP_NUMBER,NAME,TYPE,TOTAL_MB,FREE_MB from v$asm_diskgroup;

GROUP_NUMBER NAME TYPE TOTAL_MB FREE_MB

------------ ------------------------------ ------ ---------- ----------

1 CRS NORMAL 6144 5218

2 DATA EXTERN 6144000 6141937

SQL> select GROUP_NUMBER,DISK_NUMBER,NAME,FAILGROUP,FAILGROUP,PATH,STATE from v$asm_disk;

GROUP_NUMBER DISK_NUMBER NAME FAILGROUP FAILGROUP PATH STATE

------------ ----------- ------------------------------ ------------------------------ --------------------

2 0 DATA_0000 DATA_0000 DATA_0000 /dev/rhdisk10 NORMAL

2 1 DATA_0001 DATA_0001 DATA_0001 /dev/rhdisk11 NORMAL

2 2 DATA_0002 DATA_0002 DATA_0002 /dev/rhdisk12 NORMAL

2 3 DATA_0003 DATA_0003 DATA_0003 /dev/rhdisk13 NORMAL

2 4 DATA_0004 DATA_0004 DATA_0004 /dev/rhdisk14 NORMAL

2 5 DATA_0005 DATA_0005 DATA_0005 /dev/rhdisk15 NORMAL

2 6 DATA_0006 DATA_0006 DATA_0006 /dev/rhdisk16 NORMAL

1 0 CRS_0000 CRS_0000 CRS_0000 /dev/rhdisk2 NORMAL

1 1 CRS_0001 CRS_0001 CRS_0001 /dev/rhdisk3 NORMAL

1 2 CRS_0002 CRS_0002 CRS_0002 /dev/rhdisk4 NORMAL

2 7 DATA_0007 DATA_0007 DATA_0007 /dev/rhdisk5 NORMAL

GROUP_NUMBER DISK_NUMBER NAME FAILGROUP FAILGROUP PATH STATE

------------ ----------- ------------------------------ ------------------------------ --------------------

2 8 DATA_0008 DATA_0008 DATA_0008 /dev/rhdisk6 NORMAL

2 9 DATA_0009 DATA_0009 DATA_0009 /dev/rhdisk7 NORMAL

2 10 DATA_0010 DATA_0010 DATA_0010 /dev/rhdisk8 NORMAL

2 11 DATA_0011 DATA_0011 DATA_0011 /dev/rhdisk9 NORMAL NORMAL

17 rows selected.

SQL> alter diskgroup DATA add disk '/dev/rhdisk17';

Diskgroup altered.

SQL> alter diskgroup DATA add disk '/dev/rhdisk18';

Diskgroup altered.

SQL> select GROUP_NUMBER,NAME,TYPE,TOTAL_MB,FREE_MB from v$asm_diskgroup;

GROUP_NUMBER NAME TYPE TOTAL_MB FREE_MB

------------ ------------------------------ ------ ---------- ----------

1 CRS NORMAL 6144 5218

2 DATA EXTERN 7168000 7165915

SQL> select GROUP_NUMBER,DISK_NUMBER,NAME,FAILGROUP,FAILGROUP,PATH,STATE from v$asm_disk;

GROUP_NUMBER DISK_NUMBER NAME FAILGROUP FAILGROUP PATH STATE

------------ ----------- ------------------------------ ------------------------------ --------------------

2 0 DATA_0000 DATA_0000 DATA_0000 /dev/rhdisk10 NORMAL

2 1 DATA_0001 DATA_0001 DATA_0001 /dev/rhdisk11 NORMAL

2 2 DATA_0002 DATA_0002 DATA_0002 /dev/rhdisk12 NORMAL

2 3 DATA_0003 DATA_0003 DATA_0003 /dev/rhdisk13 NORMAL

2 4 DATA_0004 DATA_0004 DATA_0004 /dev/rhdisk14 NORMAL

2 5 DATA_0005 DATA_0005 DATA_0005 /dev/rhdisk15 NORMAL

2 6 DATA_0006 DATA_0006 DATA_0006 /dev/rhdisk16 NORMAL

1 0 CRS_0000 CRS_0000 CRS_0000 /dev/rhdisk2 NORMAL

1 1 CRS_0001 CRS_0001 CRS_0001 /dev/rhdisk3 NORMAL

1 2 CRS_0002 CRS_0002 CRS_0002 /dev/rhdisk4 NORMAL

2 7 DATA_0007 DATA_0007 DATA_0007 /dev/rhdisk5 NORMAL

GROUP_NUMBER DISK_NUMBER NAME FAILGROUP FAILGROUP PATH STATE

------------ ----------- ------------------------------ ------------------------------ --------------------

2 8 DATA_0008 DATA_0008 DATA_0008 /dev/rhdisk6 NORMAL

2 9 DATA_0009 DATA_0009 DATA_0009 /dev/rhdisk7 NORMAL

2 10 DATA_0010 DATA_0010 DATA_0010 /dev/rhdisk8 NORMAL

2 11 DATA_0011 DATA_0011 DATA_0011 /dev/rhdisk9 NORMAL

2 12 DATA_0012 DATA_0012 DATA_0012 /dev/rhdisk17 NORMAL

2 13 DATA_0013 DATA_0013 DATA_0013 /dev/rhdisk18 NORMAL

17 rows selected.

SQL> select * from v$asm_operation;

no nows selected

SQL>