Mark /Emulate an HDD as SSD in ESXi

Identify the storage device in which you wish to mark as an SSD . Use the following ESXCLI command 

esxcli storage core device list

Above image shows device mpx.vmhba1.C0:T2:L0 shows "Is SSD" parameter as false. 

We can change the mpx.vmhba1.C0:T2:L0 device to SDD  by applying below commands 

esxcli storage nmp satp rule add -s VMW_SATP_LOCAL -d mpx.vmhba1:C0:T2:L0 -o enable_ssd

esxcli storage core claiming reclaim -d mpx.vmhba1:C0:T2:L0

If you want to perform the opposite, add the disable_ssd option. If you receive an error regarding a duplicate rule, you will need to first remove the SATP rule and then re-create with the appropriate option.

esxcli storage nmp satp rule add -s VMW_SATP_LOCAL -d mpx.vmhba1:C0:T1:L0 -o disable_ssd
esxcli storage core claiming reclaim -d mpx.vmhba1:C0:T1:L0

Note :- If you are running Nested Virtualization and the virtual disk of that VM is stored on an actual SSD, that virtual disk will automatically show as SSD  .