Multibus ST-506/QIC-02 (was: Re: SGI IRIS 1400 ...)

Is those one of V170 drives that made that *TINGggg!* like pong ping ball dropped on hard tabletop noise when finishes spun up and head arm hit zero track stop then made faint whir noise while it finds the servo track? I think these stops in those has no rubber (to stick) or locks so you don't have those that heads got stuck like on those early MFM/RLL, early small capacity with clear paint casing w/ aluninum top w/ cone head philips screws style micropolis drives. Head arm in parked position presses against one of rubber stop and got stuck hard enough that powerful voice coil couldn't pull free. Fix: open it up and with park lock soleoid (easy to see, it's external) depressed (from bottom), tug the arm free, put cover back on, run it up hooked to the computer, back up data, trash that crap. I fixed V170 up to get data recovered then threw out HD by wiping that platters. (!!) Because heads was squealing like crying pig with a painful thing somewhere. Heads were plowing through dirty tracks and it vibrated. That was around '94 or so. Cheers, Wizard