MSMQ controller servers (the PEC, PSC, and BSCs) can benefit from two or more physical disks. For optimal MQIS performance, one disk should be used for the MQIS data device, and the other for the MQIS log device. The log devices may be created on separate drives when you install the controller servers. However, once the MSMQ server is installed you cannot move the data or log devices.
For optimal messaging performance on MSMQ servers, put the messaging files, message log files, and transaction files on separate physical disk. For more information, see "Messaging Performance" later in this chapter.