[prev in list] [next in list] [prev in thread] [next in thread] 

List:       linux-ide-arrays
Subject:    Re: Can't hot swap drives?
From:       Dan Yocum <yocum () fnal ! gov>
Date:       2004-06-07 14:08:24
Message-ID: 40C476D8.7050003 () fnal ! gov
[Download RAW message or body]



Peter L. Ashford wrote:
> Jason,
> 
> 
>>Oh, well; I could buy some of the RDC-400 cages and hope for the best
>>or I could look for another source for these 3-into-2 cages.  Any
>>recommendations?
> 
> 
> I've looked at the 3Ware cages, and I don't like them.  The problem I have
> with them is that thee fans are on the side.  It doesn't appear that they
> bring cool air into the case.
> 
> The Cremax and SuperMicro cages have a fan on either the front or back
> that causes outside air to flow over the disks.  This does a better job of
> keeping them cool than using the side fan (recirculating the air), and it
> reduces the case temp, as it increases air flow through the case.

Back when I was using the floor chassis (before acceptably cheap^H^H^H^H^H 
cost effective rack mount chassis's were available) I did some temperature 
tests of the disks in the 3ware cages.  I ran bonnie++ for 24 hours to get 
them nice and hot, and shot them with an IR gun.  Typical temps of the disks 
on the outside near the center were in the 75-90F range, well below max 
operating temperature.  Room temp was 60F.  The chassis's had LOTS of other 
fans though, moving air from front to back.  Don't count on using just the 
fans on the cages - they just move the air over the disks - you'll need 
system cooling fans, too.

> 
> Good luck.
> 				Peter Ashford
> 
> 
> 

-- 
Dan Yocum
Sloan Digital Sky Survey, Fermilab  630.840.6509
yocum@fnal.gov, http://www.sdss.org
SDSS.  Mapping the Universe.  An odd mix of profound wisdom and poor timing.


[prev in list] [next in list] [prev in thread] [next in thread]