Optimizing AIX 5L performance Tuning disk performance Optimizing AIX 5L performance: Tuning disk performance, Part 1 Learn more about direct I/O, concurrent I/O, asynchronous I/O, and best practices for each method of I/O implementation. This three-part series on the AIX(R) disk and I/O subsystem focuses on the challenges ofoptimizingdisk I/O performance. While disk tuning is arguably less excit..