On Vmware ESX or ESXi: If you are trying to Vmotion a Virtual Machine (VM) that has a Raw Device Mapping (RDM) attached, you may get an error message saying: virtual disk ‘hd1’ is mapped direct-access LUN that is not accessible. This error usually occurs when there is LUN ID mismatch across hosts. Here is solution from VMware… Continue reading Mapped direct-access LUN that is not accessible error