[ale] Harddirve fan

[Robert Reese]

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On 7/24/2006 at 8:31 PM James P. Kinney III wrote:

>Shouldn't be. The case on the drive is grounded so that should dissipate
>any "floating" charges. It is concievable that a potential could be
>generated between to adjacent points on the electronics board but the
>likelyhood is very small. I can't see it happening without a deliberate
>attempt to inject charged particles into the air stream. As long as the
>airstream is relatively clean (i.e. not a dog/cat fur stream with air
>for lubricant - like my house :) the frictional creation of static is
>just not an issue _inside_ the case as everything is surrounded by metal
>(which won't build up a static charge well).
>
>On Mon, 2006-07-24 at 18:32 -0400, Jim Popovitch wrote:
>> Is there any static buildup concerns with having a case fan blow air 
>> directly over/under harddrives?  Specifically Western Digital SATA
>drives.

Keep in mind, too, that there has to be a difference in potential between
the drives and the surrounding environment that would accept or release a
static charge.  I'm not sure, but my guess is that you'd more likely have a
problem with the polarization of particles (creating a small magnetic
field?) instead of a discharge.  But then again, I'm not an electrical
engineer, so I may just be full of hot air.  At any rate, Mr. Kinney is
correct: the drives are "grounded" to the case (more important) and the
case _should_ be grounded via the your home's ground circuit (less
important).

Cheers,
Robert~

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