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

Virtual SAN requires that flash devices be in an unclaimed state with no existing partitions or file systems; the presence of a VMFS datastore means the device is already partitioned and claimed by the storage stack, making it unavailable for VSAN disk groups.

The vFlash Read Cache feature exclusively claims a flash device at the host level to use as a read cache tier; a device already claimed by vFlash cannot simultaneously be contributed to a VSAN disk group.

While VSAN has minimum capacity recommendations, a device being below a soft threshold does not automatically make it 'unavailable' in the UI; the device would still appear as a candidate and the correct answers involve claimed/in-use states.

The absence of partitions is actually the desired state for a VSAN candidate disk; an unpartitioned device is eligible to be claimed by VSAN, so lacking partitions does not make it unavailable.