If you plan to use an SSD device in your vSphere host, ensure that the device is tagged as SSD. You can identify it in the vSphere client or using commands. The information about the drive type is displayed as SSD in the vSphere client if the data store is SSD. Both of the following vSphere hosts have different ESX data store configurations for your reference.

This vSphere host has no SSD data store. It has four FC drive data stores, one local drive data store, and one NFS data store.

The following vSphere host has one SSD data store, which is displayed as SSD under Drive Type. The other data stores are FC drives.

You can also list all storage devices using the following command. The value of Is SSD is true. The result shown is for your reference:

# esxcli storage core device list

If the vSphere host cannot automatically identify the storage device as SSD, you need to tag the device as SSD using SATP claim rules, that is, the LUN masking procedure. For more...