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A standard 19-inch server rack cabinet is typically 42u in height, 600 millimetres (24 in) wide, and 36 inches (914.40 mm) deep. [18] This comprises a volume of 974 L, or just under a cubic meter. Newer server rack cabinets come with adjustable mounting rails allowing the user to place the rails at a shorter depth if needed.
Each 1100 watt PSU has a built-in fan. For cooling of the server-modules there are four blower-modules, each containing two fans, and for cooling of the rest of the chassis there are 6 internal fans which can only be reached by opening the chassis. The fans used are the same units as used in the PowerEdge R-720xd rack-server.
Also power and cooling is redundant: the chassis supports up to six power-supplies and nine fan units. All power supplies and fan-units are inserted from the back and are all hot-swappable. [2] The power supplies are located at the bottom of the enclosure while the fan-units are located next to and in between the switch or I/O modules.
In the current naming scheme, towers are designated by T, racks by R, and blades by M (for modular). [1] The 19″ rack-servers come in different physical heights expressed in rack units or U. Most modern servers are either 1U or 2U high while in the past the 4U was more common.
All versions of the enclosure occupy 6 rack units or can be used as a standalone unit (with optional tower conversion kit) It can accommodate up to 8 half-height blade servers. It includes space for 6 power supplies (single-phase, or a -48V DC), 6 cooling fans, 4 single-wide or 2 single-wide and one double-wide interconnect modules
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