Based on an article I found on google under "Emulate HDD as SSD flash disk on Esxi and VMware workstation"
Thanks to virtual geek.
Howto implement:
· Stop the Xpenology VM
· Add an SCSI Controller VMware paravirtual as additional device
· Add 2 identical sized virtual disks and check that they are connected to the scsi controller
· Edit the xpenology.vmx (or whatever your vm is called) file using putty and add the following for the disks
scsi0:0.virtualSSD = "1"
scsi0:1.virtualSSD = "1"
· startup the vm
disks are visible as SSDs in storage manager
· Add write cache under SSD Cache
· That’s it.
Currently running on version 6.2.3-25426 update 3 on backup environment.
xpenology ssd cache howto.pdf