Why do some hard drives spin more quietly than others of the same RPM,
disk size, and bearing type?

Evacuate all the air/gas from the case hi-vac and that makes the heads fly
much closer to the surface too. A vacumn wont transmit sound. The allows
for using new optical-acoustic techniques to read the data as the heads see
and feel the data.

"Ron Reaugh" <ron-(E-Mail Removed)> wrote in message news:<HFvoc.85621$(E-Mail Removed)>...

> Evacuate all the air/gas from the case hi-vac and that
> makes the heads fly much closer to the surface too. A
> vacumn wont transmit sound. The allows for using
> new optical-acoustic techniques to read the data as
> the heads see and feel the data.

Thanks for the very factual answer.

Ron Reaugh wrote:
>
> Evacuate all the air/gas from the case hi-vac and that makes the heads fly
> much closer to the surface too. A vacumn wont transmit sound. The allows
> for using new optical-acoustic techniques to read the data as the heads see
> and feel the data.

Ron,

I would read over what you have written - just to be sure.


Odie
--

RetroData
Data Recovery Experts
www.retrodata.co.uk

"Odie Ferrous" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Ron Reaugh wrote:
> >
> > Evacuate all the air/gas from the case hi-vac and that makes the heads
fly
> > much closer to the surface too. A vacumn wont transmit sound. The
allows
> > for using new optical-acoustic techniques to read the data as the heads
see
> > and feel the data.
>
> Ron,
>
> I would read over what you have written - just to be sure.
>

Why? Nobody else is.

Rita

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In article <(E-Mail Removed)>,
larrymoencurly <(E-Mail Removed)> wrote:
>"Ron Reaugh" <ron-(E-Mail Removed)> wrote in message
>news:<HFvoc.85621$(E-Mail Removed)>...
>
>> Evacuate all the air/gas from the case hi-vac and that
>> makes the heads fly much closer to the surface too. A
>> vacumn wont transmit sound. The allows for using
>> new optical-acoustic techniques to read the data as
>> the heads see and feel the data.
>
>Thanks for the very factual answer.

YHBT. YHL. HAND.

The heads rely on ground effect to keep them from scraping across the
platters. They need air to do this. A hard drive with a vacuum inside
wouldn't work too well.

(I'd recommend adding ron-(E-Mail Removed) to your killfile. I've never seen
anything of value originate from that address.)

_/_
/ v \ Scott Alfter (remove the obvious to send mail)
(IIGS( http://alfter.us/ Top-posting!
\_^_/ rm -rf /bin/laden >What's the most annoying thing on Usenet?

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=rWCU
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Was it PT that said one is born every minute?

"Scott Alfter" <(E-Mail Removed)> wrote in message
news:uZapc.27011$bS1.3114@okepread02...
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> In article <(E-Mail Removed)>,
> larrymoencurly <(E-Mail Removed)> wrote:
> >"Ron Reaugh" <ron-(E-Mail Removed)> wrote in message
> >news:<HFvoc.85621$(E-Mail Removed)>...
> >
> >> Evacuate all the air/gas from the case hi-vac and that
> >> makes the heads fly much closer to the surface too. A
> >> vacumn wont transmit sound. The allows for using
> >> new optical-acoustic techniques to read the data as
> >> the heads see and feel the data.
> >
> >Thanks for the very factual answer.
>
> YHBT. YHL. HAND.
>
> The heads rely on ground effect to keep them from scraping across the
> platters. They need air to do this. A hard drive with a vacuum inside
> wouldn't work too well.
>
> (I'd recommend adding ron-(E-Mail Removed) to your killfile. I've never
seen
> anything of value originate from that address.)
>
> _/_
> / v \ Scott Alfter (remove the obvious to send mail)
> (IIGS( http://alfter.us/ Top-posting!
> \_^_/ rm -rf /bin/laden >What's the most annoying thing on
Usenet?
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.2.4 (Linux)
>
> iD8DBQFApTvaVgTKos01OwkRAiZPAJ9XZdcsxcuSE+DOckXtk1bTmd7uIQCg7sR+
> Ky6KyhnoB2WC4nEOVtdQgJo=
> =rWCU
> -----END PGP SIGNATURE-----

"larrymoencurly" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Why do some hard drives spin more quietly than others of the same RPM,
> disk size, and bearing type?

Overall mechanical, electromechanical and aerodynamic design factors. Vast
engineering effort goes into such analysis. Often the designer doesn't know
the exact "noise" characteristics of a design until it comes off the
production line. You want a precise answer to a question which is locked
deeply into proprietary drive design issues. You wont get that precise
answer.

I still like the part about the new head design where it "sees" the sparks
and "feels" the bumps<VBG>.

"Scott Alfter" <(E-Mail Removed)> wrote in message news:uZapc.27011$bS1.3114@okepread02...
> In article <(E-Mail Removed)>, larrymoencurly <(E-Mail Removed)> wrote:
> >"Ron Reaugh" <ron-(E-Mail Removed)> wrote in message news:<HFvoc.85621$(E-Mail Removed)>...
> >
> >> Evacuate all the air/gas from the case hi-vac and that
> >> makes the heads fly much closer to the surface too. A
> >> vacumn wont transmit sound. The allows for using
> >> new optical-acoustic techniques to read the data as
> >> the heads see and feel the data.
> >
> >Thanks for the very factual answer.
>
> YHBT. YHL. HAND.
>
> The heads rely on ground effect to keep them from scraping across the
> platters. They need air to do this. A hard drive with a vacuum inside
> wouldn't work too well.
>

> (I'd recommend adding ron-(E-Mail Removed) to your killfile. I've never seen
> anything of value originate from that address.)

Maybe that tells more about you than it does about him?

"Folkert Rienstra" <see_reply-(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...

>
> "Scott Alfter" <(E-Mail Removed)> wrote in
message news:uZapc.27011$bS1.3114@okepread02...
> > In article <(E-Mail Removed)>,
larrymoencurly <(E-Mail Removed)> wrote:
> > >"Ron Reaugh" <ron-(E-Mail Removed)> wrote in message
news:<HFvoc.85621$(E-Mail Removed)>...
> > >
> > (I'd recommend adding ron-(E-Mail Removed) to your killfile. I've never
seen
> > anything of value originate from that address.)
>
> Maybe that tells more about you than it does about him?



That he has a keen eye in spotting the timewasters, trolls, malcontents,
social misfits, and other assorted assholes that burn our bandwidth?
Personally, I think the guy is pretty sharp and wise by suggesting
killfiling the moron.



Rita