|Tower Server DELL||Blade Server DELL||Rack Server DELL|
Dell PowerEdge is a server line by Dell, following the naming convention for other dell products: the PowerVault (data storage) and the PowerConnect (data transfer & switches).The 19″ rack-servers come in different physical heights expressed in rack unit or U. Most modern servers are either 1U or 2U high while in the past the 4U was more common.
Each server has two or four on-board NIC’s and two additional Mezzanine card-slots for additional I/O options: 1 Gb or 10 Gb Ethernet cards, Fibre Channel HBA’s or InfiniBand slots. Apart from USB connectors a blade-server doesn’t offer direct connections: all I/O goes via the midplane of the enclosure.