Micropolis 1355 disk drives

On 11/06/2011 07:03 AM, Rob Jarratt wrote: I've done this many times, as in more than 6 and have a stack of them to be worked on yet. No clean room, however a clean space and no flying dust. I just open them up and apply power and unstick the heads while rotating. I must be rotating as the heads will slide across the disk in contact. I've had that happen with no problems I try to avoid that. If that results in the heads doing a servo seek and settling on track 000 then I needs to deal with the gummy bumper, tweezers and sine disterity to grab the bumper and remove it or place a piece of adheasive paper on it so when the head retract I do not have to repeat the process. This assumes the HDA is otherwise ok, and same for electronics. I've written this up in comp.os.. (i forget) and others have as well over the years. This works because the disk spinning has great centrifical force and anything landing is destined for the perimeter where there is a circulation filter to pick it up. This is why the drive spins up before loading the heads (also to have the needed airflow for the heads to fly.). Also whats the worse that can happen, you kill an otherwise unusable disk? Allison