I've got several ST251-1s that spin up just fine, no funny noises, but then do a bunch of back-and-forth seeks and shut down again.
It's the usual, "they worked fine the last time;" any ideas what the problem is and if there's anything that can be done? Presumably it's having trouble finding the sync track; weak signal? Any ideas? m ----- Original Message ----- From: "Al Kossow" <a...@bitsavers.org> To: <cctalk@classiccmp.org> Sent: Thursday, October 20, 2016 12:23 PM Subject: Re: Unsticking a Seagate ST-419 head > The two disks this morning went much better. I tried using a heat gun on the > outside of the hda and VERY > gently freed the heads and got the spindle to turn. Then I pulled the top > board and coaxed the spindle motor > back up to speed. The root disk read without errors, usr has a consistent 28. > > The same experiment didn't work on the usr disk from the first system though > :-( > > At least now I have a good root image and probably usuable usr > > > >> On 10/20/16 2:05 AM, jim stephens wrote: >>> I actually years ago unstuck drives by removing them, hooking them to >>> cables long enough to allow me to have access to >>> them external to the system with power, and just holding them in the air >>> and giving them a sharp twist around the axis >>> of the drive. That was enough to unstick most. >> >
