In our throughput tests, the 30TB IronWolf Pro peaked on the read run at 273.99MB/s, just shy of the official maximum of 275MB/s. Writes were further back at peaking at 255MB/s before falling away as the block size deepened.
In the read throughput test, the drive peaked at the 8MB block mark at 273.991MB/s before falling back slightly at the end of the test run.
In the write throughput test, the 30TB IronWolf Pro peaked at the 128KB block mark at 255.52MB/s before dropping back erratically until the end of the test run.