Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
Paul wrote:
> In article <d3bkf8$d4l$1@reader08.wxs.nl>, "OldBoy" <boel069@noplanet.nl> wrote:
>
>
>>0-60 C for ST3120827AS
>>
>>Gr. Jan
>
>
> While the Seagate documentation gives separate ratings
> for temperature and humidity, the two parameters are in
> fact related to one another. I learned this from some
> nice IBM documentation on IBM disk drives. To get some
> sample curves that illustrate the concept, try here:
>
>
http://www.hitachigst.com/tech/techlib.nsf/products/Deskstar_7K400
> "Deskstar 7K400 Specification v1.4" (~1MB download)
>
> On PDF page 64, is an operating curve that shows how
> sensitive the drive is to humidity.
>
> The reason for this, is disk drives are open to the atmosphere.
> Disk drives have a "breather hole" and the drive equalizes to
> atmospheric pressure. The "breather hole" is shown on PDF page
> 68 of the Hitachi document. A micron filter prevents particulate
> from entering the drive, but not moisture.
>
> If the air is below 15% humidity, then you can run it nice
> and hot
A comfortable room is 40% humidity, and on a
> steamy summer day (without A.C.), a room can reach 60% humidity.
> 60% humidity is when your carpets start to mildew. A disk drive
> can easily go outside the desirable range of conditions on a
> summer's day.
Very interesting. So in fact, at 35° (seems to be a fairly typical
operating temp), it's ok if humifity is <60%, but at 45° it needs to be
<32%.
I wonder what our cases are, typically? Probably during warm summers,
many of us operate our drives outside of spec - I wonder if thats why so
many drives fail, so often, when compared to the MBTF?
Ben
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