1. Run below mention command on both node 

$devfsadm

2. Log on to RAC1 node and complete bellow mention procedure.

Here we will create following partition:

c0d1s0 for  OCR Disk

c0d1s1 for Voting Disk 

c0s1s3 form ASM Disk

c0s1s4 from ASM Disk 

c0s1s5 from ASM Disk 

3. Complete bellow mention steps for creating partition

$format

4. Set ownership of Disk (Note: This will be done after creating Oracle user and dba group) 

Default owner is root:sys needs to be changed to oracle:dba .We need to set oracle:dba ( here oracle is a Oracle owner and dba is a group) ownership of the disk. 

Check ownership of Disk. Execute following command for all slice as a root user.

Example:

$ ls -lhL /dev/rdsk/c0d1s0               

crw-r-----   1 root     sys      118, 64 Feb 16 02:10 /dev/rdsk/c0d1s0

$ chown oracle:dba /dev/rdsk/c0d1s0