14" hard drive refurbish question (7900A)

From: James Willing <jimw_at_agora.rdrop.com>
Date: Tue Aug 10 00:03:04 1999

At 09:01 PM 08/09/1999 -0500, Jay West wrote:
>I finally got around to putting a new lower platter into my 7900A. Kinda
>hard to do from underneath, but it's done.
>2) I was thinking (bad sign <grin>)...if the heads contacted the platter
>enough to scrape off a nice circle of oxide, won't cleaning the heads and
>replacing the platter accomplish nothing? What I mean is - isn't it very
>likely that whatever caused them to scrape in the first place won't be fixed
>by a new lower platter and cleaned heads? What am I missing here?

Well, thinking to the positive side (like the crash was caused by some form
of contamination on the platter that was not purged at startup - and this
is now corrected) the main thing to keep in mind is that the 'flying' heads
must retain their aerodynamic shape in order to function properly, so a
very close inspection is in order.

Look for any scratches in the head surfaces, cracks or gouges on the edges,
debris in the head gap (not found on all heads).

If all of the above looks good, and the head carrier frame is straight and
still properly sprung, and all is firmly attached to the actuator, then
following a good cleaning you have a pretty good chance of them behaving

YMMV - required disclaimer B^}


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Received on Tue Aug 10 1999 - 00:03:04 BST

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