Fan very near a Hard Drive

[zjustice]

Wondering of any magnetic interference from the following :-

Drive thats horizontal but not really in the air flow of the front case fan

theres only 1 HD gap below the HD in question so i'm thinking of lying
a fan falt down blowing onto the chip side as theose chips can get well warm

i'm sure its overkill on my part but wondering if the nag field around the
fan is a problem

i remmeber the squate-law or similar that states if you double the distance
the field strenght is diminshed by 4
or similar as it spreads out rather than a 1 dimensional distance
measurement
but i'm sure you clever chaps can advise


-------------
! hd
-------------
-------------
! fan blowing upwards
-------------
==================== flat end of hd cage

p.s. just realised - theres not much air flow for the fan from underneath
but it wont be a mega powerful one

thanks

 

[Peter]

I wouldn't worry about magnetic field interference, but rather on a dust
buildup on a circuit board of your HD.
If not cleaned, it could shorten your drive life after fan ceases to
operate.

 

[Rod Speed]

Shouldnt be a problem, there are a few bay kits that do it like that.

 

[Arno Wagner]

Wondering of any magnetic interference from the following :-

Drive thats horizontal but not really in the air flow of the front case fan

theres only 1 HD gap below the HD in question so i'm thinking of lying
a fan falt down blowing onto the chip side as theose chips can get well warm

i'm sure its overkill on my part but wondering if the nag field around the
fan is a problem

i remmeber the squate-law or similar that states if you double the distance
the field strenght is diminshed by 4
or similar as it spreads out rather than a 1 dimensional distance
measurement
but i'm sure you clever chaps can advise

Square is right, basically the surface of a sphere.

I see no problem. I have had this configuration for several years on
one disk. The fans use sort of a ring-magnet with the driver-coils on
the inside. I think these magnets have little external field. The fans
I use (Papst) have additional shielding and no noticeable field on the
outside.

p.s. just realised - theres not much air flow for the fan from underneath
but it wont be a mega powerful one

Some airflow is massively better than no airflow. Convection is really
not efficient with air. Having >=5mm space beneath the fan should be
plenty.

Arno

 

[zjustice]

thanks

i'll experiment this weekend !

fan warm


Square is right, basically the surface of a sphere.

I see no problem. I have had this configuration for several years on
one disk. The fans use sort of a ring-magnet with the driver-coils on
the inside. I think these magnets have little external field. The fans
I use (Papst) have additional shielding and no noticeable field on the
outside.


Some airflow is massively better than no airflow. Convection is really
not efficient with air. Having >=5mm space beneath the fan should be
plenty.

Arno