Just a followup to the previous conversations on power and rack density I see that Microsoft has announced that one floor of their new Chicago datacenter will be container based. Each 40 foot container will house 1,000 to 2,000 systems with between 150 and 220 containers on the first floor. Main links: http://www.datacenterknowledge.com/archives/2008/Apr/01/microsoft_embraces_d... http://datacenterlinks.blogspot.com/2008/04/miichael-manos-keynote-at-data-c... http://mvdirona.com/jrh/perspectives/2008/04/02/FirstContainerizedDataCenter... Related link: http://www.datacenterknowledge.com/archives/2008/Apr/04/microsofts_198_megaw... -- Simon J. Lyall | Very Busy | Web: http://www.darkmere.gen.nz/ "To stay awake all night adds a day to your life" - Stilgar | eMT.