On Sat, 2019-06-15 at 12:00 -0500, cctalk-request at classiccmp.org wrote: Hi. I have a suggestion. The generation of hard disks you are having trouble with frequently had a linear actuator and were auto-parking. If the parking function failed at power off, not an uncommon fault, the drive will fail to spin on power-on. An example of this sort of drive is the Seagate ST4096. The time-honored fix for this is to take the drive loose from all connections and, holding it in both hands with the face towards you, bring the face of the drive into your thigh as you raise your thigh to meet the face of the drive. The violence of this motion will serve to park the heads and the drive will spin right up when powered. I hope this solves your problem. Best of luck. Jeff