在已有ASM磁盘组中增加asm磁盘，对磁盘组空间进行扩容，操作方法和步骤如下：
1、环境说明
要增加磁盘的磁盘组为：DATA 要增加的磁盘为： /dev/mpath/mpathc 当前asm磁盘情况查看
[root@rac1 ~]# su - grid
[grid@rac1 ~]$ asmcmd
ASMCMD> lsdg
State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name
MOUNTED EXTERN N 512 4096 4194304 1509480 57396 0 57396 0 N DATA/
MOUNTED NORMAL N 512 4096 1048576 6024 5098 2008 1545 0 Y OCRVOTE/

增加前Total_MB 1509480
2、在第一个节点上:
[root@rac1 ~]# multipath -ll
mpathc (36000c293f6bbbc389bd05510eafa061f) dm-7 VMware,Virtual disk
size=1.5T features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 3:0:2:0 sdd 8:48 active ready running
36000c290cbcbdb49a3f95dee3c1f13be dm-1 VMware,Virtual disk
size=500G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 3:0:1:0 sdc 8:32 active ready running
36000c29a805236ed740b94a822cf344c dm-0 VMware,Virtual disk
size=980G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 3:0:0:0 sdb 8:16 active ready running
You have new mail in /var/spool/mail/root
[root@rac1 mapper]# ll
total 0
lrwxrwxrwx 1 root root 7 Oct 27 23:32 36000c290cbcbdb49a3f95dee3c1f13be -> ../dm-1
lrwxrwxrwx 1 root root 7 Oct 27 23:32 36000c290cbcbdb49a3f95dee3c1f13bep1 -> ../dm-3
lrwxrwxrwx 1 root root 7 Oct 27 23:32 36000c290cbcbdb49a3f95dee3c1f13bep2 -> ../dm-4
lrwxrwxrwx 1 root root 7 Oct 27 23:32 36000c290cbcbdb49a3f95dee3c1f13bep3 -> ../dm-5
lrwxrwxrwx 1 root root 7 Oct 27 23:32 36000c290cbcbdb49a3f95dee3c1f13bep4 -> ../dm-6
lrwxrwxrwx 1 root root 7 Oct 27 23:32 36000c29a805236ed740b94a822cf344c -> ../dm-0
lrwxrwxrwx 1 root root 7 Oct 27 23:32 36000c29a805236ed740b94a822cf344cp1 -> ../dm-2
crw-rw---- 1 root root 10, 58 Oct 27 23:32 control
lrwxrwxrwx 1 root root 7 Dec 9 18:00 mpathc -> ../dm-7
3、在第二个节点上：
[root@rac2 ~]# multipath -ll
mpathe (36000c293f6bbbc389bd05510eafa061f) dm-7 VMware,Virtual disk
size=1.5T features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 4:0:2:0 sdd 8:48 active ready running
mpathd (36000c290cbcbdb49a3f95dee3c1f13be) dm-1 VMware,Virtual disk
size=500G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 4:0:1:0 sdc 8:32 active ready running
mpathc (36000c29a805236ed740b94a822cf344c) dm-0 VMware,Virtual disk
size=980G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
`- 4:0:0:0 sdb 8:16 active ready running
在第一个节点上把新增的1.5T存储分一个区作为新增加的ASM数据盘
[root@rac1 ~]# fdisk /dev/mpath/mpathc
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x2f438bcd.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): p
Disk /dev/mapper/mpathc: 1649.3 GB, 1649267441664 bytes
255 heads, 63 sectors/track, 200512 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x2f438bcd
Device Boot Start End Blocks Id System
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-200512, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-200512, default 200512):
Using default value 200512
Command (m for help): p
Disk /dev/mapper/mpathc: 1649.3 GB, 1649267441664 bytes
255 heads, 63 sectors/track, 200512 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x2f438bcd
Device Boot Start End Blocks Id System
/dev/mapper/mpathcp1 1 200512 1610612608+ 83 Linux
加载分区
[root@rac1 ~]# partprobe /dev/mapper/mpathc #不重启识别磁盘分区
[root@rac2 ~]# partprobe /dev/mapper/mpathe
建议还是重启下
现有ASM磁盘组合DISK查看
SQL*Plus: Release 11.2.0.4.0 Production on Fri Jul 1 10:55:18 2016
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 instance_name from v$instance;
INSTANCE_NAME
----------------
+ASM1
SQL> col name for a10
SQL> set linesize 150
SQL> select NAME, ALLOCATION_UNIT_SIZE, STATE, TOTAL_MB, FREE_MB USABLE_FILE_MB from gv$asm_diskgroup;
NAME ALLOCATION_UNIT_SIZE STATE TOTAL_MB USABLE_FILE_MB
---------- -------------------- ----------- ---------- --------------
DATA 4194304 CONNECTED 1509480 57396
OCRVOTE 1048576 MOUNTED 6024 5098
DATA 4194304 CONNECTED 1509480 57396
OCRVOTE 1048576 MOUNTED 6024 5098
SQL> select failgroup, name from v$asm_disk where group_number=(select group_number from v$asm_diskgroup where name = 'DATA');
FAILGROUP NAME
------------------------------ ------------------------------
ORADATA02 ORADATA02
ORADATA03 ORADATA03
查看主机的oracleasm磁盘
[root@rac1 dev]# ll /dev/oracleasm/disks
total 0
brw-rw---- 1 grid asmadmin 8, 33 Oct 27 23:32 OCR_VOTE04
brw-rw---- 1 grid asmadmin 8, 34 Oct 27 23:32 OCR_VOTE05
brw-rw---- 1 grid asmadmin 8, 35 Oct 27 23:32 OCR_VOTE06
brw-rw---- 1 grid asmadmin 8, 17 Oct 27 23:32 ORADATA02
brw-rw---- 1 grid asmadmin 8, 36 Oct 27 23:32 ORADATA03
You have new mail in /var/spool/mail/root
[root@rac1 dev]# oracleasm listdisks
OCR_VOTE04
OCR_VOTE05
OCR_VOTE06
ORADATA02
ORADATA03
在节点一上创建 ORADATA04
[root@rac1 ~]# oracleasm createdisk ORADATA04 /dev/mapper/mpathcp1
Writing disk header: done
Instantiating disk: done
[root@rac1 ~]# ll /dev/oracleasm/disks
total 0
brw-rw---- 1 grid asmadmin 8, 33 Oct 27 23:32 OCR_VOTE04
brw-rw---- 1 grid asmadmin 8, 34 Oct 27 23:32 OCR_VOTE05
brw-rw---- 1 grid asmadmin 8, 35 Oct 27 23:32 OCR_VOTE06
brw-rw---- 1 grid asmadmin 8, 17 Oct 27 23:32 ORADATA02
brw-rw---- 1 grid asmadmin 8, 36 Oct 27 23:32 ORADATA03
brw-rw---- 1 grid asmadmin 253, 8 Dec 12 16:43 ORADATA04
[root@rac1 dev]# oracleasm listdisks
OCR_VOTE04
OCR_VOTE05
OCR_VOTE06
ORADATA02
ORADATA03
ORADATA04
在第二个节点:
[root@rac2 dev]# oracleasm scandisks
Reloading disk partitions: done
Cleaning any stale ASM disks...
Scanning system for ASM disks...
Instantiating disk "ORADATA04"
[root@rac2 dev]# ll /dev/oracleasm/disks
total 0
brw-rw---- 1 grid asmadmin 8, 33 Sep 14 15:06 OCR_VOTE04
brw-rw---- 1 grid asmadmin 8, 34 Sep 14 15:06 OCR_VOTE05
brw-rw---- 1 grid asmadmin 8, 35 Sep 14 15:06 OCR_VOTE06
brw-rw---- 1 grid asmadmin 8, 17 Sep 14 15:06 ORADATA02
brw-rw---- 1 grid asmadmin 8, 36 Sep 14 15:06 ORADATA03
brw-rw---- 1 grid asmadmin 8, 49 Dec 12 16:43 ORADATA04
[root@rac2 dev]# oracleasm listdisks
OCR_VOTE04
OCR_VOTE05
OCR_VOTE06
ORADATA02
ORADATA03
ORADATA04
将ASM磁盘增加到DATA磁盘组中
[root@rac1 ~]# su - grid
[grid@rac1 ~]$ export ORACLE_SID=+ASM1
[grid@rac1 ~]$
[grid@rac1 ~]$
[grid@rac1 ~]$ sqlplus /nolog
SQL> conn / as sysasm
SQL> alter diskgroup DATA add disk 'ORCL:ORADATA04';
Diskgroup altered.
查看是否成功添加
ASMCMD> lsdg
State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name
MOUNTED EXTERN Y 512 4096 4194304 3082340 1630248 0 1630248 0 N DATA/
MOUNTED NORMAL N 512 4096 1048576 6024 5098 2008 1545 0 Y OCRVOTE/
注：本文转自https://blog.weiminginfo.com/archives/1556522105842
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