Suppose that you have prepared servers including two database servers, storage and name server. Now you are ready to go on installing grid infrastructure.
Please note that, I have put all lengthy configuration work in the previous post, so we don't need to configure anything in this post. All we have to do is to install grid infrastructure. That is to say, our job is clearly separated into two main parts, one is configuration, the other is installation.
Install Grid Infrastructure
Starting with Oracle Grid Infrastructure 12c Release 2 (12.2), installation and configuration of Oracle Grid Infrastructure software is simplified with image-based installation.
[grid@primary01 ~]$ cd $ORACLE_HOME
[grid@primary01 grid]$ ./gridSetup.sh

Oracle 18c Grid Infrastructure Installation - Select Configuration Option

Oracle 18c Grid Infrastructure Installation - Select Cluster Configuration

Oracle 18c Grid Infrastructure Installation - Grid Plug and Play Information

Oracle 18c Grid Infrastructure Installation - Cluster Node Information

Oracle 18c Grid Infrastructure Installation - Cluster Node Information - Add Node

Oracle 18c Grid Infrastructure Installation - Cluster Node Information - List Nodes

Oracle 18c Grid Infrastructure Installation - Cluster Node Information - SSH Connectivity Setup

Oracle 18c Grid Infrastructure Installation - Cluster Node Information - SSH Connectivity Created

Oracle 18c Grid Infrastructure Installation - Cluster Node Information - Next Step

Oracle 18c Grid Infrastructure Installation - Specify Network Interface Usage

Oracle 18c Grid Infrastructure Installation - Storage Option Information

Oracle 18c Grid Infrastructure Installation - Grid Infrastructure Management Repository Option

Oracle 18c Grid Infrastructure Installation - Create ASM Disk Group

Oracle 18c Grid Infrastructure Installation - Create ASM Disk Group - Change Discovery Path

Oracle 18c Grid Infrastructure Installation - Create ASM Disk Group - List and Select Disk Candidates
Scanning no disk can be a very serious problem in this step. If you found no disk is listed in all possible discovery paths, it might be because ASMLib scanned no disks after server reboot. Or probably another complicated issue, which is caused by improper sector sizes of your storage.
If you found no cure, you may check my post for more thoughts: How to Resolve Grid Installation OUI Discovers No Disk. It may be a basic problem.

Oracle 18c Grid Infrastructure Installation - Specify ASM Password

Oracle 18c Grid Infrastructure Installation - Specify ASM Password - INS-30011

Oracle 18c Grid Infrastructure Installation - Failure Isolation Support

Oracle 18c Grid Infrastructure Installation - Specify Management Options

Oracle 18c Grid Infrastructure Installation - Privileged Operating System Groups

Oracle 18c Grid Infrastructure Installation - Specify Installation Location

Oracle 18c Grid Infrastructure Installation - Create Inventory

Oracle 18c Grid Infrastructure Installation - Root Script Execution Configuration

Oracle 18c Grid Infrastructure Installation - Perform Prerequisite Checks

Oracle 18c Grid Infrastructure Installation - Perform Prerequisite Checks - Verification Results

Oracle 18c Grid Infrastructure Installation - Perform Prerequisite Checks - Verification Results - INS-13016

Oracle 18c Grid Infrastructure Installation - Summary - 1 of 2

Oracle 18c Grid Infrastructure Installation - Summary - 2 of 2

Oracle 18c Grid Infrastructure Installation - Save Response File

Oracle 18c Grid Infrastructure Installation - Summary - Prepare to Install

Oracle 18c Grid Infrastructure Installation - Installing Product

Oracle 18c Grid Infrastructure Installation - Installing Product - Confirm Root Scripts Execution

Oracle 18c Grid Infrastructure Installation - Installing Product - 69%

Oracle 18c Grid Infrastructure Installation - Installing Product - 75%

Oracle 18c Grid Infrastructure Installation - Finish
We are getting the below errors during root script execution.
INS-32123 Execution of ‘GI Install’ script failed on nodes: [rac1]
Died at /u01/app /18.0.0/crs/install/crsutils.pm line 4380
Please let us know the fix
Please check the installation log for more information.