For example, if it is an office VM, relatively little performance is required and the standard LSI Logical SAS SCSI controller can be used. The choice of the right controller depends on the applications within the VM. This Controller is the default Controller for Windows VMs in vSphere 7.0. This controller further optimizes the performance of SSD RAIDs, NVMe and PMEM storage. Starting with ESXi 6.5 and virtual hardware version 13, an NVMe controller can also be added to the VM. In order for the controller to be used by the guest operating system, the VMware Tools must be installed. This controller was developed for high performance storage systems, because it can handle much higher I/O and reduces the CPU load. Starting with ESXi 4.0 and virtual hardware version 7, the VMware Paravirtual controller is available. It is also necessary for the configuration of Microsoft Server Cluster Service (MSCS). It is suitable for almost any workload that does not have large I/O requirements. This controller is recognized and supported by every guest operating system without additional drivers. The standard controller in almost every VM is the LSI Logical SAS SCSI controller.
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