In your ESXi environment, you can use flash devices with several functionalities.

Table 1. Using Flash Devices with ESXi
Functionality Description
vSAN vSAN requires flash devices. For more information, see the Administering VMware vSAN documentation.
VMFS Datastores You can create VMFS datastores on flash devices. Use the datastores for the following purposes:
Virtual Flash Resource (VFFS) Set up a virtual flash resource and use it for the following functionalities: