From: Don Yuniskis <dgy@rtd.com>
Message-Id: <199512021619.JAA05853@seagull.rtd.com>
Subject: Re: No Thumbs??? (lack of concensus)
To: smp@csn.net (Steve Passe)
Date: Sat, 2 Dec 1995 09:19:07 -0700 (MST)
Cc: freebsd-hackers@freefall.FreeBSD.org (FreeBSD hackers)
In-Reply-To: <199512020340.UAA00866@clem.systemsix.com> from "Steve Passe" at Dec 1, 95 08:40:39 pm
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It seems that Steve Passe said:
 
> > So, how are people mounting 1991's (etc.)?  In file server cases??
> > Seems like a bit of overkill...
> 
> I use single height enclosures with the front panel removed (ie the blockout

single *half* height or single *full* height?

> used for things like tape drives).  In its place I put a foam filter to catch 
> dust.  This allows airflow directly across the top of the drive.  I also

Hmmm... that's a good idea (tho' not quite as visually appealing! :>)

> get a GOOD fan from someplace like Digikey.  Panasonic makes a line of 
> ball-beaing fans with much higher rated air-flows that the ones typically
> found in disk cabinents.  The oem fans also usually die in short order, which

And *another* good idea!  I'll have to examine the fans on these cabinets
a bit more closely...

> will fry a disk quite quickly. You do pay for it with increased fan noise!

Yeah, well, my office isn't very quiet as it is so a few more dB of fan
noise won't matter...
 
> I am running a MC3243W (4GB 7200rpm) in one of these and the temp of the 
> outlet 
> air is little warmer than that from the older MC2217s I have (in same type
> cabinents).  The top of the cabinet is no warmer than room temp.

I was looking to put *two* 3243's in a fullheight external enclosure.
Or, a single 1991.  But, same problems (I imagine) would plague each...
How warm does the 3243 case get (use *top* side of finger to test).
 
> Check out:
> 
>  http://www.freebsd.org/~faulkner/multimedia/HomeAuto/Therm.html

Cute.  I designed a similar product for remote equipment monitoring.
It would pick up the phone and call voice/data to report temperature
errors, etc.  I imagine you had monitoring the disk temperature as
your intended application?  :>   Maybe just put a warning light and then
hardwire a circuit to (unceremoniously) remove power from the drive at hi-temp.
 
> I might actually get back to finish this soon.

I've got a *list* of _those_!  :>