Suicidal HDD (OT mystery)

From: jpero_at_cgo.wave.ca <(jpero_at_cgo.wave.ca)>
Date: Thu Apr 30 18:17:20 1998

> Date: Fri, 1 May 1998 02:30:49 +0100 (BST)
> Reply-to: classiccmp_at_u.washington.edu
> From: Tony Duell <ard_at_p850ug1.demon.co.uk>
> To: "Discussion re-collecting of classic computers" <classiccmp_at_u.washington.edu>
> Subject: Re: Suicidal HDD (OT mystery)

> >
> >
> >
> >
> > The speakers MIGHT be the problem. There is a pair of them, each
> > twice the size of an IMSAI, right beneath the macintosh
>
> I see... Now, while a lot of older drives locked the pack to the spindle
> using a fairly powerful magnet (and 3.5" floppy drives still do), I'd
> still not want to run a hard disk near speakers of that size. Can you
> rearange the layout of the room a little?
>
> -tony
>
Guys! I know of several deaf and impaired hearing people who likes
music at full blast thru regular quality 60W with subwoofer and their
hard drives cared nothing a whit about vibration level. I think
something is funny: (Thobbing of music...boom boom bop...)

1. Did someone disconnect/connect scsi stuff often?
2. Did something bang the table where Mac sits often?
3. Specific brands is no better than some and why didn't Max give us
what kind of both toasted hds was?
4. Termination issues sometimes cooks the hd especially selection of
termination power used.
5. Sharp resonanent sounds sometimes can make the pc chassis
resosate thus killing hd life early. That does means to some
machines with plastic chassis and some that will resnsonate, shaking
the hd long and often. Push and pull on that hard drive bay to see
how much it can shift or "pluck" it to see if it does vibrate.

Magnetic field have nearly no effect on hd's inside that steel boxes
unless Apple used plastic shell with thin tin sheets which that
requires you to remove either speakers or the pc to different
location at least 6" to 3 feet away.
Magnetic field strength falls away at logithmic rate with increaseing
distrance from the source.

Jaosn D.

>
Received on Thu Apr 30 1998 - 18:17:20 BST