How to change the storage adapter to Paravirtual (PVSCSI) for a Windows guest
VMware offers multiple types of virtual SCSI-adapters to use in your virtual machines. Based on your choice of operating system VMware will offer a Buslogic or LSI logic adapter. There is however a Paravirtual SCSI-controller that can improve performance for your virtual machines, especially in environments with high IO-loads. This controller will provide greater throughput and lower CPU utilization for your VMkernel.