Data integrity and asynchronous I/O are unrelated concerns. The value of async I/O is that it exposes the concurrency and parallelism of the storage hardware to

Data integrity and asynchronous I/O are unrelated concerns. The value of async I/O is that it exposes the concurrency and parallelism of the storage hardware to the software layer, enabling many types of performance optimizations. The vast majority of I/O operations in many database architectures do not have any sequential dependencies on other I/O operations, even within a single execution context. Data integrity is a function of design and implementation correctness, in addition to having robust mechanisms for dealing with data corruption during I/O, hardware failures, etc.