For better identifying ASM raw devices, we can rename those default disk names into more understandable names. Let's see current disks.
[root@primary01 /]# lspv
...
hdisk4 none None
hdisk5 none None
hdisk6 none None
hdisk7 none None
We use rendev to rename them.
[root@primary01 /]# rendev -l hdisk4 -n ASM_DISK_1
ASM_DISK_1
[root@primary01 /]# rendev -l hdisk5 -n ASM_DISK_2
ASM_DISK_2
[root@primary01 /]# rendev -l hdisk6 -n ASM_DISK_3
ASM_DISK_3
[root@primary01 /]# rendev -l hdisk7 -n ASM_DISK_4
ASM_DISK_4
Then list them again.
[root@primary01 /]# lspv
...
ASM_DISK_1 none None
ASM_DISK_2 none None
ASM_DISK_3 none None
ASM_DISK_4 none None
Later on, don't forget to change the owner and permission set like this:
[root@primary01 /]# chown grid:asmadmin /dev/*ASM*
[root@primary01 /]# chmod 660 /dev/*ASM*