The UPS and the diesel generator are two instruments for keeping a server functioning in case there are difficulties with the primary source - a disruption or shaky current that cannot keep the hosting server functioning properly, for instance. UPS is an abbreviation for Uninterruptible Power Supply, although it is oftentimes referred to as Uninterruptible Power Source also. The UPS is, essentially, an effective battery that's attached to the hosting server and to the electric power network all of the time, so in the event of any interruption, it is already functioning, which allows the hosting server to carry on working without losing any data. The diesel generator is an engine which will power up the whole data center. It does take some time to begin working and it's the UPS that provides that time. Those 2 power solutions are fundamental for any facility or hosting company that wants to avoid data loss and hardware damage resulting from an unexpected electric power problem.