[root@node01 ~]# groupadd -g 1200 dba
[root@node01 ~]# groupadd -g 1201 oinstall 
[root@node01 ~]# groupadd -g 1202 asmadmin
[root@node01 ~]# groupadd -g 1203 asmdba 
[root@node01 ~]# useradd -u 1100 -g oinstall -G asmadmin,asmdba,dba grid
[root@node01 ~]# echo grid | passwd --stdin grid
Changing password for user grid.
passwd: all authentication tokens updated successfully.

[root@node01 ~]# id grid
uid=1100(grid) gid=1201(oinstall) groups=1201(oinstall),1200(dba),1202(asmadmin),1203(asmdba)

[root@node01 ~]# yum install -y kmod-oracleasm
[root@node01 ~]# rpm -ivh oracleasmlib-2.0.12-1.el7.x86_64.rpm
[root@node01 ~]# rpm -ivh oracleasm-support-2.1.11-2.el7.x86_64.rpm

[root@node01 ~]# /usr/sbin/oracleasm configure -i
Configuring the Oracle ASM library driver.
This will configure the on-boot properties of the Oracle ASM library
driver.  The following questions will determine whether the driver is
loaded on boot and what permissions it will have.  The current values
will be shown in brackets ('[]').  Hitting <ENTER> without typing an
answer will keep that current value.  Ctrl-C will abort.
Default user to own the driver interface []: grid
Default group to own the driver interface []: asmadmin
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

[root@node01 ~]# /usr/sbin/oracleasm init
Creating /dev/oracleasm mount point: /dev/oracleasm
Loading module "oracleasm": oracleasm
Configuring "oracleasm" to use device physical block size
Mounting ASMlib driver filesystem: /dev/oracleasm

[root@node01 ~]# /usr/sbin/oracleasm createdisk disk1 /dev/sdb1
Writing disk header: done
Instantiating disk: done

[root@node01 ~]# /usr/sbin/oracleasm createdisk disk2 /dev/sdc1
Writing disk header: done
Instantiating disk: done

[root@node01 ~]# /usr/sbin/oracleasm createdisk disk3 /dev/sdd1
Writing disk header: done
Instantiating disk: done

[root@node01 ~]# /usr/sbin/oracleasm createdisk disk4 /dev/sde1
Writing disk header: done
Instantiating disk: done

[root@node01 ~]# /usr/sbin/oracleasm createdisk disk5 /dev/sdf1
Writing disk header: done
Instantiating disk: done

[root@node01 ~]# /usr/sbin/oracleasm createdisk disk6 /dev/sdg1
Writing disk header: done
Instantiating disk: done

[root@node01 ~]# /usr/sbin/oracleasm createdisk disk7 /dev/sdh1
Writing disk header: done
Instantiating disk: done

[root@node01 ~]# /usr/sbin/oracleasm createdisk disk8 /dev/sdi1
Writing disk header: done
Instantiating disk: done

[root@node01 ~]# /usr/sbin/oracleasm createdisk disk9 /dev/sdj1
Writing disk header: done
Instantiating disk: done

[root@node01 ~]# /usr/sbin/oracleasm createdisk disk10 /dev/sdk1
Writing disk header: done
Instantiating disk: done

[root@node01 ~]# /usr/sbin/oracleasm scandisks
Reloading disk partitions: done
Cleaning any stale ASM disks...
Scanning system for ASM disks...

[root@node01 ~]# /usr/sbin/oracleasm listdisks
DISK1
DISK10
DISK2
DISK3
DISK4
DISK5
DISK6
DISK7
DISK8
DISK9
[root@node02 ~]# groupadd -g 1200 dba
[root@node02 ~]# groupadd -g 1201 oinstall 
[root@node02 ~]# groupadd -g 1202 asmadmin
[root@node02 ~]# groupadd -g 1203 asmdba 
[root@node02 ~]# useradd -u 1100 -g oinstall -G asmadmin,asmdba,dba grid
[root@node02 ~]# echo grid | passwd --stdin grid
Changing password for user grid.
passwd: all authentication tokens updated successfully.

[root@node02 ~]# id grid
uid=1100(grid) gid=1201(oinstall) groups=1201(oinstall),1200(dba),1202(asmadmin),1203(asmdba)

[root@node02 ~]# yum install -y kmod-oracleasm
[root@node02 ~]# rpm -ivh oracleasmlib-2.0.4-1.el6.x86_64.rpm
[root@node02 ~]# rpm -ivh oracleasm-support-2.1.8-1.el6.x86_64.rpm

[root@node02 ~]# /usr/sbin/oracleasm configure -i
Configuring the Oracle ASM library driver.
This will configure the on-boot properties of the Oracle ASM library
driver.  The following questions will determine whether the driver is
loaded on boot and what permissions it will have.  The current values
will be shown in brackets ('[]').  Hitting <ENTER> without typing an
answer will keep that current value.  Ctrl-C will abort.
Default user to own the driver interface []: grid
Default group to own the driver interface []: asmadmin
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

[root@node02 ~]# /usr/sbin/oracleasm init
Creating /dev/oracleasm mount point: /dev/oracleasm
Loading module "oracleasm": oracleasm
Configuring "oracleasm" to use device physical block size
Mounting ASMlib driver filesystem: /dev/oracleasm

[root@node02 ~]# /usr/sbin/oracleasm scandisks
Reloading disk partitions: done
Cleaning any stale ASM disks...
Scanning system for ASM disks...
Instantiating disk "DISK1"
Instantiating disk "DISK2"
Instantiating disk "DISK3"
Instantiating disk "DISK4"
Instantiating disk "DISK5"
Instantiating disk "DISK6"
Instantiating disk "DISK7"
Instantiating disk "DISK8"
Instantiating disk "DISK9"
Instantiating disk "DISK10"

[root@node02 ~]#  /usr/sbin/oracleasm listdisks
DISK1
DISK10
DISK2
DISK3
DISK4
DISK5
DISK6
DISK7
DISK8
DISK9
[root@node01 ~]# /usr/sbin/oracleasm deletedisk disk1

[root@node01 ~]# dd if=/dev/zero of=/dev/sdb1 bs=8192 count=256

[root@node01 ~]# /usr/sbin/oracleasm createdisk disk1 /dev/sdb1