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Switching a RDM from physical to virtual compatibility mode

switch-rdm-mode

This article provides steps to switch a Raw Data Mapping (RDM) from physical to virtual compatibility mode without data loss.

To change a RDM from physical to virtual compatibility mode:

Note: VMware recommends that you backup your configuration before performing these steps.

Power off the virtual machine.
Right-click the virtual machine and click Edit Settings.
Note the SCSI device that the RDM is using (for example, SCSI0:5).
Remove the RDM hard disk from the virtual machine, ensure that the Delete from Disk option is selected, and then click OK.

Note: Unlike VMDK files, the Delete from Disk option removes only the RDM pointer files. Data on the RDM remains intact.
Right-click the virtual machine and click Edit Settings.
Add the RDM back to the virtual machine as a new disk and select virtual compatibility mode. Ensure to use the SCSI device that you noted in Step 3.
Power on the virtual machine.

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