You can enhance the performance of random-write operations on a logical volume under certain circumstances.
Using the QoS-based management tools that are provided in Oracle FS System Manager (GUI), you can improve the overall performance of random-write intensive applications by taking advantage of RAID 10 data protection, which replaces four I/O operations with a parallel mirrored-write operation.
The system utilizes this RAID level when you set the optimization settings for a logical volume to random access with a write I/O bias. In this case, the system allocates space on a RAID 10 array on which the system performs parallel mirrored-write operations (two writes).
In addition, because the data resides on two independent drives, RAID 10 allows the Oracle FS System to optimize read operations. In this case, the system can select the least busy of the two drives when performing the read operation.