To allow shared access to disk resources, point to existing disks on the VM, the first node of a WSFC cluster. Use the same SCSI IDs while assigning disks to all additional nodes.


Before you begin, obtain the following information:

  • Obtain SCSI IDs for all virtual disks to be shared.
  • Obtain disk file path on datastore for all shared disks.
Note: The procedure for clustered VMDK, pRDMs and vVol is the same.


  1. In the vSphere Client, select the newly created virtual machine, a second node of the WSFC, right-click and select Edit Settings.
  2. Click the New device drop-down menu, to add a storage controller select VMware Paravirtual, and click Add.
    Note: LSI SAS is supported, but VMware Paravirtual is recommended.
  3. Click the New device drop-down menu, select Existing Hard Disk, and click Add.
  4. In Disk File Path, browse to the location of the disk to be shared specified for the first node.
  5. Select Physical as the compatibility mode and click Next.
  6. Select the same SCSI ID you chose for the first virtual machine’s shared storage disks (for example, SCSI (1:0)), and click OK.
    Note: The disk SCSI ID for this virtual machine’s shared storage must match the corresponding SCSI ID for the first virtual machine.
  7. Click OK.
    The wizard creates a new hard disk.
  8. In the New Virtual Machine - Edit Settings dialog box, expand SCSI controller and select the Change Type drop-down menu.
  9. Select the appropriate type of controller, depending on your operating system.
    Operating System Type of Controller
    Windows Server 2008 SP2 and above LSI Logic SAS and VMware Paravirtual
    For supported guest operating systems see Other Clustering Requirements and Recommendations.
  10. Click OK.
  11. Set SCSI Bus Sharing to Physical and click OK.