<div class="gmail_quote">2009/2/2 Singer XJ Wang <span dir="ltr"><<a href="mailto:wang@pythian.com">wang@pythian.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
[snipped]<div class="Ih2E3d"><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
You can do that by using fans other than the tiny, whiney, 40mm fans<br>
that vibrate at 6000 to 18,000 Hz. A couple of 80 or 120 mm muffin<br>
fans at the back or front, pushing air in (hence the deep<br>
dimensions), but the top and bottom would need recesses to allow<br>
sufficient airflow when the positions above and below are filled.<br>
<br>
</blockquote></div>
How are you getting these 80 or 120mm fans in a 1U chassis? Remember you got barely 45mm to play<br>
with at the back and front of the switch. How are you going to mount a 80mm or 120mm fan on there? Are you assuming that the units mounted<br>
above (or below) your switch is a short 1U? You can't assume that...<br>
</blockquote><div><br>Ever heared of a centrifugal fan? ;-) <br><br>Chris<br></div></div><br>