Virtual compatibility mode preserves the ability to perform virtual machine snapshots. Virtual Machine can directly access the storage device using RDM and RDM contains metadata which controls the disk access to the physical device.ġ.For Microsoft cluster configuration in Virtual machine (Virtual-to-virtual or physical-to-virtual)Ģ.For configuring a virtual machine to use N_Port ID Virtualization (NPIV)ģ.For running SAN management software (Storage resource management software, storage array snapshot software, replication software,etc) inside a virtual machineĤ.For any application running in a virtual machine that needs to access a device using hardware-specific SCSI commandsĥ.RDM is useful in physical-to-virtual conversion operations by avoiding migration of a large data LUN to a VMDK. RDM is basically a Mapping file acts as a proxy for a raw physical storage device placed in a VMFS volume. Raw device mapping (RDM) is method to provide direct access to a LUN on a iscsi or fibre channel storage system for a virtual machine. Diff VCenter 5.5 appliance and vCenter on WIndows.
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