[ale] HELP!!! /HDA DISASTER!

[jmmills at telocity.com (John Mills)]

On Tue, 29 Jan 2002, jeff hubbs wrote:

> Maybe things have changed, but it has been my understanding that disk 
> drives are at a normal 1 atm, open to the outside through a dense filter.

My understanding, too. They must be vented because the gas [air] expands
and contracts with temperature changes. Another point we're neglecting is
that disk heads are suspended hydrodynamically on a film of air dragged
along by the disk's spinning. No gas, no bearing under the heads: OUCH!

> John Mills wrote:
> 
> > ... my guess is they start with
> > dry, clean air and vent the drives through filter material which stops the
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> > largest dirt, at least for consumer products.

Regards -
 John Mills


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