ASM Related steps for 11gR2 Grid Infrastructure

ASM Related steps for 11gR2 Grid Infrastructure

I am putting this ASM related steps only, on request of a friend. In two projects where I handled HP EVA Storage also, I setup 2 node RAC for eBusiness Suite. If you require any other part of the implementation experience, would be happy to share.

This was done for Oracle Enterprise Linux

Prepare Storage and Disks

1. Run fdisk for RDBMS and GRID Binaries Multipathing Disk(Both Node)
2. Run partprobe for RDBMS and GRID Binaries Multipathing Disk(Both Node)
3. Run fdisk for ASM Related Multipathing Disk(Database Node1)
4. Run partprobe for ASM Related Multipathing Disk(Both Node)
5. Run mkfs.ext3 for RDBMS and GRID Binaries Multipathing Disk(Database Node1)

Multipathing Disks Used for ASM:

mpath2 - PRODDATA
mpath6 - PRODFRA
mpath5 - PRODOCR1
mpath4 - PRODOCR2
mpath3 - PRODOCR3

As an example fdisk and partprobe is shown for mapth2 disk, same needs to be done for others:

[root@mkkracdbserver1 ~]# fdisk /dev/mapper/mpath2
[root@mkkracdbserver1 ~]# partprobe /dev/mapper/mpath2

[root@mkkracdbserver1 ~]# ls -ltr /dev/mapper/mpath2*
brw-rw---- 1 root disk 253,  0 Aug  9 00:02 /dev/mapper/mpath2
brw-rw---- 1 root disk 253, 10 Aug  9 00:02 /dev/mapper/mpath2p1

[root@mkkracdbserver2 ~]# partprobe /dev/mapper/mpath2

[root@mkkracdbserver2 ~]# ls -ltr /dev/mapper/mpath2*
brw-rw---- 1 root disk 253, 0 Aug  6 18:07 /dev/mapper/mpath2
brw-rw---- 1 root disk 253, 9 Aug  9 00:06 /dev/mapper/mpath2p1



Install Oracle ASM Libraries RPM

# rpm -ivh oracleasm-support-2.1.4-1.el5.x86_64.rpm
# rpm -ivh oracleasmlib-2.0.4-1.el5.x86_64.rpm
# rpm -ivh oracleasm-2.6.18-238.el5-2.0.5-1.el5.x86_64.rpm

# /etc/init.d/oracleasm init
# /etc/init.d/oracleasm exit
# /etc/init.d/oracleasm status

To Load and initialize the ASMLib driver issue init
To Stop the ASMLib driver issue exit
To Display the status of the Oracle ASMLib driver issue status




Configure ASMLib Driver

This needs to be done on both the Database Node

# /etc/init.d/oracleasm configure

[root@mkkracdbserver1 ~]# /etc/init.d/oracleasm configure
Configuring the Oracle ASM library driver.

Default user to own the driver interface []: oraprod
Default group to own the driver interface []: dba
Start Oracle ASM library driver on boot (y/n) [n]: y
Scan for Oracle ASM disks on boot (y/n) [y]: y
Writing Oracle ASM library driver configuration: done
Initializing the Oracle ASMLib driver:                     [  OK  ]
Scanning the system for Oracle ASMLib disks:               [  OK  ]

[root@mkkracdbserver2 ~]# /etc/init.d/oracleasm configure
Configuring the Oracle ASM library driver.

Default user to own the driver interface []: oraprod
Default group to own the driver interface []: dba
Start Oracle ASM library driver on boot (y/n) [n]: y
Scan for Oracle ASM disks on boot (y/n) [y]: y
Writing Oracle ASM library driver configuration: done
Initializing the Oracle ASMLib driver:                     [  OK  ]
Scanning the system for Oracle ASMLib disks:               [  OK  ]




Create ASM Disks

1. Use Oracleasm Createdisk Command on Database Node1
2. Use Oracleasm Listdisks Command on Database Node1
2. Use Oracleasm Scandisks Command on Database Node2
2. Use Oracleasm Listdisks Command on Database Node2

Important Note: Do not deviate from the above order, or else you may end up with non-visible ASM disks while doing the installation. You will have to change the diskstring parameter to asm_diskstring='/dev/oracleasm/disks/*' to make the disks visible. To overcome the issue, reboot both the database node and disks will be visible.


[root@mkkracdbserver1 ~]# oracleasm createdisk ASMDATA01 /dev/mapper/mpath2p1
Writing disk header: done
Instantiating disk: done

[root@mkkracdbserver1 ~]# oracleasm createdisk ASMFRA01 /dev/mapper/mpath6p1
Writing disk header: done
Instantiating disk: done

[root@mkkracdbserver1 ~]# oracleasm createdisk ASMOCR01 /dev/mapper/mpath5p1
Writing disk header: done
Instantiating disk: done

[root@mkkracdbserver1 ~]# oracleasm createdisk ASMOCR02 /dev/mapper/mpath4p1
Writing disk header: done
Instantiating disk: done

[root@mkkracdbserver1 ~]# oracleasm createdisk ASMOCR03 /dev/mapper/mpath3p1
Writing disk header: done
Instantiating disk: done

[root@mkkracdbserver1 ~]# oracleasm listdisks
ASMDATA01
ASMFRA01
ASMOCR01
ASMOCR02
ASMOCR03

[root@mkkracdbserver2 ~]# oracleasm scandisks
Reloading disk partitions: done
Cleaning any stale ASM disks...
Scanning system for ASM disks...
Instantiating disk "ASMDATA01"
Instantiating disk "ASMOCR03"
Instantiating disk "ASMOCR02"
Instantiating disk "ASMOCR01"
Instantiating disk "ASMFRA01"

[root@mkkracdbserver2 ~]# oracleasm listdisks
ASMDATA01
ASMFRA01
ASMOCR01
ASMOCR02
ASMOCR03


Implement Metalink Note 1059847.1 for Multipathing Disks

This needs to be done on both the Database Nodes

Important Note: If this is not done, then root.sh will fail in Database Node2.

11GR2 GRID INFRASTRUCTURE INSTALLATION FAILS WHEN RUNNING ROOT.SH ON NODE 2 OF RAC USING ASMLIB [ID 1059847.1]

1. Modify the /etc/sysconfig/oracleasm with:

ORACLEASM_SCANORDER="dm"
ORACLEASM_SCANEXCLUDE="sd"

# /etc/init.d/oracleasm restart

[root@mkkracdbserver1 ~]# /etc/init.d/oracleasm restart
Dropping Oracle ASMLib disks:                              [  OK  ]
Shutting down the Oracle ASMLib driver:                    [  OK  ]
Initializing the Oracle ASMLib driver:                     [  OK  ]
Scanning the system for Oracle ASMLib disks:               [  OK  ]
[root@mkkracdbserver1 ~]#

[root@mkkracdbserver2 ~]# /etc/init.d/oracleasm restart
Dropping Oracle ASMLib disks:                              [  OK  ]
Shutting down the Oracle ASMLib driver:                    [  OK  ]
Initializing the Oracle ASMLib driver:                     [  OK  ]
Scanning the system for Oracle ASMLib disks:               [  OK  ]
[root@mkkracdbserver2 ~]#

Cheers !!!!
Malay Khawas
Oracle Apps/Fusion DBA