At 1:00 PM -0500 1/5/2009, Charles Davis wrote:
>On Jan 5, 2009, at 12:35 PM, Dan wrote:
>  > At 12:28 PM -0500 1/5/2009, Charles Davis wrote:
>>>  I think the usual failure mode these days, is a surface deformity of
>>>  some sort.
>>
>>  Surface deformities are mapped out during factory low-level 
>>  formatting.
>
>Yeah, those 'scratches that didn't polish out, 'holidays' in the plating, etc.

LOL  Years ago, we broke apart some crashed disk packs - the big ones 
- and made mobiles of them.  The separator rings made nice clappers. 
We discovered that if you scraped a bit of the magnetic material off 
the platters, you could change their tone.  My college roomies spent 
a lot of time "tuning" them.

- Dan.
-- 
- Psychoceramic Emeritus; South Jersey, USA, Earth

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