Re: HDDs (Was: PDP-11/45 RSTS/E boot problem

2019-02-20 Thread Liam Proven via cctalk
On Tue, 19 Feb 2019 at 22:00, Fred Cisin via cctalk wrote: > > Yes. > I was thinking in terms of slightly older drives than that, particularly > 5.25" > Getting at the slider on newer drives wouldn't be practical. Probably not. I suspect that ITRO 90+ % of the people I work with have never seen a

HDDs (Was: PDP-11/45 RSTS/E boot problem

2019-02-19 Thread Fred Cisin via cctalk
One of the moxt common causes of a terrible ear-piercing high whine is the spindle contact. Many old drives had a springy piece that rubbed against the end of the spindle. Over time, it would wear a divot, polish that, and start to squeal. A very light pressure on it would test that hypothesis.