Scalable system testing tools

Embodiments of the present invention generally provide a method for testing integrity of data transmitted to and from a target device through a data connection. In one embodiment, the method includes generating a data load on the data connection by repetitively writing test data patterns to the target device and reading data patterns from the target device, measuring data throughput to and from the target device while generating the data load, comparing the data patterns read from the target device to the test data patterns to test for data corruptions, and generating debug information if a data corruption is detected. For some embodiments, the method may also include invoking a user specified test utility. The user specified test utility may determine an input/output (I/O) dispatch method for writing test data patterns to the target device and reading data patterns from the target device.