Noisy profile hard drive

On Thu, 30 Dec 2004, chris wrote: 72 years ago, I was in charge of an early 3Com LAN, with drives in stacked 'shoeboxes'. I came in one Monday morning to find one of the drives making this thin 'shrieking' noise. I of course did a panic shutdown and got the Vendor rolling - turns out that it was the Absolute Filter on top of the drive case making the same kind of noise that one makes by blowing across a piece of taut paper. The tech just pressed down on the aluminum cover at the edge of the filter 'pod' and that fixed it. I was sure the heads had crashed, but somehow the system was still running - though I couldn't see how, since it sounded like the heads were milling the platters into expensive red dust. Maybe this is what's happening here?? Cheers and Happy NuYeer to all and sundry! John