On Sat, Mar 06, 2010 at 02:54:42AM +0800, Owen DeLong wrote: > > On Mar 6, 2010, at 2:41 AM, William Herrin wrote: > > > On Fri, Mar 5, 2010 at 12:54 PM, Owen DeLong <o...@delong.com> wrote: > >> Not sure about the purpose of a raised floor if it doesn't create a > >> plenum, but, the > >> step forward from raised-floor plenum is hot-aisle/cold-aisle which > >> requires a good > >> bit more discipline in your datacenter, but, is substantially more > >> efficient. > > > > Hi Owen, > > > > Hot-aisle/cold-aisle is a separate issue from a raised floor plenum. > > They're mutually supportive but not mutually dependent. > > > I've never seen anyone do hot asile/cold aisle using raised floor. > > Overhead cabling has become the norm in most modern installations > and once you go to hot aisle/cold aisle, you no longer need the lower > plenum, so, while they can be mutually supportive, neither requires > the other, and, in practical modern usage, hot-aisle/cold-aisle usually > precludes the need for the additional expense of raised floor. > > Absent the need for the expense of the raised floor, it's rarely > installed in my experience, thus making them mutually exclusive > for most practical terms. > > Owen
Actually, my experience has been that most of the newer installations (last 5-7 years) that I have been able to see where raised floor is employed are also doing hot/cold rows. -Wayne --- Wayne Bouchard w...@typo.org Network Dude http://www.typo.org/~web/
