NOVA4 6070 disk booboo

[Tom Jennings]

On Wed, 2 Feb 2005, George & Oksana Wiegand wrote:

> I had a 6045 disk system (1/2 the density of the 6070) with a head crash on
> the top surface of the fixed platter about 3/4" in from the edge. One of the
> idlets that are mounted in the white ceramic head came out, so I took this
> one head assembly off but first measuring it's alignment with a feeler
> gauge, cleaned and super glued the idlet back into the head and replaced it
> with the alignment reading taken earlier. It worked, booted Ok, the damage
> must have been in the unused portion of the disk platter.

What's an idlet?

Mine's crashed in the same physical spot, likely it's track0. I
imagine it's a common spot.

I think the 6070 has double TRACK density, not bitrate density;
Bruce Ray thinks it's possible the 6070 heads are the same as 6045
heads. I'll found out later, hopefully tonight.

> Is the blower working though the filter to generate a cushion of air for the
> head to ride on? I thought this is how it works, not only for dust removal.

It is, but that's only to cool & purge. It doesn't lift. Bernoulli
& skin effect on the head does the lifting, induced by the high
surface speeds.


Tom Jennings <tomj at wps.com>