Conner HD's stickums: portable Mac HD probs.

Dead or no spin Conners... Anyone who thought it's bad bearing grease... not really. Bad bearings rarely happens, did tear down those dead Conners for failure analysis. It's the platters and heads stuck together after heads sliding on platter during spin up and spin down too often and for long time wearing out the protective/lubing surface. One word of Conner's designations on type of HD form factors: no zeros between CP3 and the amount of formatted size is always between 2/3 height to half height, One zero between CP3 and the xxx size is always 1" and extra 0's often signify next generations usually. Okay, Those problem HD's you saw in Mac portable and most Mac's that used Conner and only once with early Quantums but that is only once. I will focus only on Conner because I know this very well. That is from going though over 40 of them on that trusty bench in 3-5 years period. Most died from platters/heads stickums and some died from ground up platters especially on CP30xxx and CP300xxx and up and to lesser degree blown logic boards. I recently rebuilt a CP30174E after I finally found a logic board for it after 3 years of searching. For now no more Conners ever and thankfully that Seagate "killed" Conner. I usually don't bother the Conner hd's any longer as they're getting OLD and spare parts I had is all gone now. To confirm that your conner hd is stuck, turn on your portable and give the protable a sharp turn to sudden stop parallel with table that instant, and give once or twice after first one with turn on. Suggest putting two layers of slippery materials on table to help the easy sliding around. Jason D. PS: My friend is sending the Compaq Portable III to me with dead Conner (hint, hint!) in it. Found it along with Deskpro 386/25 in dumper! email: jpero(a)cgocable.net Pero, Jason D.