I love this. I wanted the disk noise, and I got it. I will say that’s a lot faster than my drives were in the late 1990s though.

The speed is determined by a simple 1000 / <iops> per disk (there's different disks if you click "Settings").

If you inspect and go to sources and look for "1e3 /" you'll find the line responsible, you can set a breakpoint and change e.disk.iops to 1000 which will make the timeout per row 1s instead of 2-4s, so the whole thing goes faster.