Test results: Atto Random Read
We use Atto to measure how well the drives can process random read- and write commands. We do so using both small block sizes (4 kB) and large block sizes (1 MB). The 4 kB speeds are mainly intended to provide insight in how well the drive performs when used as a disk for your OS and other programs. The 1 MB tests, on the other hand, offer insight in how well the drive performs when storing files of limited size.
In the Atto read tests we find that the Barracuda Pro 12TB consistently has the longest bar.