What are two reasons why a local flash device would be unavailable for use with Virtual SAN? (Choose two.)

If a flash device hosts an existing VMFS datastore, ESXi treats it as in use and will not allow Virtual SAN to claim it; the datastore must be removed and the device wiped before it can join a vSAN disk group.

A flash device configured for the vFlash Read Cache feature is already allocated to that service and cannot simultaneously serve as a Virtual SAN caching or capacity tier device.

While very small flash devices may be impractical for vSAN, the absence of a minimum capacity threshold does not make a device categorically unavailable the way an already-in-use device is blocked.

Virtual SAN claims and partitions raw devices itself during disk group configuration, so the absence of pre-existing partitions is the expected state and does not make a device unavailable.