Faster disks also increase the processing of recoverable messages and those express messages that have been written to disk when memory resources are in demand.
Microsoft recommends that you choose a server that has a caching disk controller with a high-speed bus interface such as PCI SCSI®. These controllers provide optimal performance for MSMQ servers. Most of these controllers support hardware disk striping, which offers greater performance and less CPU use than Windows NT Server software striping.