A default segment size is set during logical drive creation, based on the array RAID level and the logical drive usage you specify. These two parameters should optimize the segment size appropriately for your environment. Monitor your storage subsystem and change segment size when necessary for optimal performance based on the guidelines below.
If your typical I/O size is larger than your segment size, increase your segment size in order to minimize the number of drives needed to satisfy an I/O request. This is especially true in a multi-user, database or file system storage environment. Using a single drive for a single request leaves other drives available to simultaneously service other requests.
If you are using the logical drive in a single-user, large I/O environment (such as for multimedia application storage) performance is optimized when a single I/O request can be serviced with a single data stripe (the segment size multiplied by the number of drives in the array that are used for I/O). In this case multiple disks are used for the same request, but each disk is only accessed once.