[cctalk] Re: RD54 Maxtor XT-2190 w/one long meep

Oh wait, that sound? Over and over? I had a RD54 type drive that I hit with a magnet by mistake and took out the servo platter. Got that sound, over and over because the drive used servo loop positioning and couldn't find the servo track. Since you probably didn't do this, check to see if you get a signal off the servo head, and the preamps there. That might actually be it. C On 2/26/2024 5:28 PM, Jacob Ritorto via cctalk wrote: > Thanks for the good ideas and convo everyone. > > Now please do note that I can definitely hear motor/platter spinup > happening so it's definitely not "heads stuck to platter" stiction. > > I hear the lock unlatch and I *think* I even hear the heads load and fly > (comparing what I hear on this drive to other drives I've actually > seen the > guts of in flying action) so I substantially doubt it's "arm stuck to > lock > pad goo" stiction. > > So we've made it through a lot of the powerup sequence and the > problem is > at the final part - the track scan up and back down the surface - the > phase > when the signature "...blearrnnnnt-meeeeeelrp..." happens :) > > And yes I believe from memory that XT-2190 is supposed to make the same > track scan noise as the XT-1140 (I have an XT-1140 running perfectly > as a > fake RD54 in another pdp here). > > So could my behaviour of being hung at the final phase - the track scan > noise - be the result of a lost servo track?  Thinking about that, > didn't > someone on this list kill an XT-2190 recently by taking an outrageous > magnet to it?  Did you get the same track scan failure as I'm getting? > > Confused electronics on the PCB? > > Something else? > > Where would one begin diagnosing this particular problem? > > I did try the wrist twist torquing thing. > > And lightly whacking side of housing with palm of hand during track scan > noise.  Declining to do that hard, tho. > > Powered off and back on (to retry) probably near a hundred times now. > > Heated it gently in front of our forced-air furnace duct until > comfortably > warm to touch - probably near 105 F. > > All these produced absolutely zero behaviour change. > > thx > jake