Use the vmkfstools command to create a Raw Device Mapping (RDM) file on a VMFS volume and map a raw LUN to this file. After this mapping is established, you can access the LUN as you would a normal VMFS virtual disk. The file length of the mapping is the same as the size of the raw LUN it points to.
When specifying the device parameter, use the following format:
Example for Creating a Virtual Compatibility Mode RDM
In this example, you create an RDM file named my_rdm.vmdk and map the disk_ID raw disk to that file.
vmkfstools -r /vmfs/devices/disks/disk_ID my_rdm.vmdk
You can configure a virtual machine to use the
my_rdm.vmdk mapping file by adding the following lines to the virtual machine configuration file:
scsi0:0.present = TRUE scsi0:0.fileName = /vmfs/volumes/myVMFS/my_rdm.vmdk