Fan Direction (was: Re: PC floppy cable twists...)

[Paul Koning]

>>>>> "Mark" == Mark Tapley <mtapley at swri.edu> writes:

 Mark> ....  Problem is the designers actually did
 Mark> do _some_ thinking. On its way out the fan in the original
 Mark> configuration, the air went over the logic board(s) first, then
 Mark> the power supply and drives last. Reverse the fan, it's now hot
 Mark> air hitting the logic board. On my system, this caused the SCSI
 Mark> controller to fail occasionally.  

Interesting.  Drives first is normal in storage arrays because drives
are more sensitive to high temperature than logic.  It's quite strange
for a logic device to fail as you described; it suggests bad thermal
design or a SCSI controller defect (possibly design, possibly that
specific unit).

	 paul