For those who came of age in the System/370 and System/390 era, "DASD" (Direct Access Storage Device) is a sacred term. It meant head actuators, rotating platters, and channel paths that never, ever failed. The DASD 620 takes that legacy and drags it—kicking and screaming—into the modern edge.
But if you need storage that will survive a solar flare, a power surge, and a junior admin dropping a coffee on the controller—while still talking to a mainframe from 1985—nothing else comes close. dasd 620
April 14, 2026 Topic: Legacy Storage Architecture For those who came of age in the
The 620 supports up to 16 channel paths. In our benchmark, we yanked a live Fibre Channel cable during a batch job. The system didn't stutter. The secondary path took over within one I/O cycle. For banks processing end-of-day settlements, this is the difference between a footnote and a lawsuit. But if you need storage that will survive