Assign data to physical drives to evenly balance the I/O load among the available disk drives.
Identify the most frequently accessed data, and increase access bandwidth to that data with creating RAID 1 (mirror) volumes or RAID 0 (stripe) volumes.
Both RAID 0 volumes and RAID 5 volumes distribute data across multiple disk drives and help balance the I/O load. In addition, creating RAID 1 volumes can also be used to help balance the I/O load.
Use performance monitoring tools and generic OS tools such as iostat(1M), to identify the most frequently accessed data. Once identified, the "access bandwidth" to this data can be increased using RAID 0, RAID 1, or RAID 5 volumes.