Create Microsoft Cluster in ESXI using RDM disk

 To create MS cluster in ESXI host below should be minimum requirements-: 

1 . There should be two virtual Machines

2. At least 1 shared disk should be attached between both virtual machines

3. There should be 2 NICs 1 for production and another for heartbeat

4. RDM disk should attached for share disk

5. Should have Domain environment 

6. User ID should have enough privilege to create cluster 

7. Two free IP for production environment and two free IP for heartbeat (Heartbeat IP should be from different subnet)

Here I am covering only ESXI configuration part for cluster creation.

I have provisioned 2 VMS PRD1 and DEV1 for shared RDM and MS cluster

Initial HW configuration PRD1

Initial HW configuration DEV1

Select PRD1 VM -> Right click -> Go to Edit

Click on add device -> Select RDM Disk -> 

Select LUN number shared by Storage team.

Initial configuration of new attached RDM

Change sharing option from unspecified to multi-Writer and Save

Validate configuration

Now note

Disk file-:  [Shared_data] PRD1/PRD1_2.vmdk

Virtual Device Node-:  SCSI controller 0 SCSI 0:3

Now go passive node DEV1-> Right click-> Edit

Select existing Hard Disk

Browse Datastore

Now select the existing storage where RDM disk file is existing and select .VMDK file

Now change Sharing mode from unspecified to Multi-writer

Now power ON both node one by one.

Login to the server-> Open computer management-> Disk management-> Select new attached disk and initialize

Right click and create new volume -> Give Name

Login to another server DEV1 and go to computer management -> Disk management -> Right click on new detected disk and initialize

Now you will see same RDM disk is visible in both nodes PRD1 and DEV1

Now you need attach two NICs in both VMs and install Microsoft Cluster Manager role and continue with configuration....