Which statement regarding the hardware of the bare device in FusionCompute is INCORRECT?

The statement that a data store using raw device mapping can correspond to multiple disks is incorrect because raw device mapping (RDM) in virtualization environments, such as FusionCompute, typically maps a virtual disk to a single underlying physical disk or LUN. This method allows a virtual machine to access storage devices directly, providing enhanced performance and features for specific workloads.

In the context of bare-metal deployments, RDM serves as a proxy that allows virtual machines to interact with the SAN storage as if it were a local disk while still benefiting from the managed environment. Each raw device mapping corresponds directly to an individual storage location rather than aggregating multiple disks into a single data store.

The other statements are accurate: disks mapped using raw devices often do deliver better performance due to reduced overhead from the virtualization layer; operating systems are commonly installed on RDM disks to take advantage of direct access; and a data store using RDM indeed corresponds to a LUN on SAN storage, allowing the virtualization infrastructure to leverage complex storage setups effectively.