The UPS and the diesel generator are 2 devices for keeping a server functioning if there are issues with the primary power source - a disruption or unstable current that cannot keep the hosting server working correctly, for instance. UPS is an abbreviation for Uninterruptible Power Supply, although it is sometimes called Uninterruptible Power Source also. The UPS is, essentially, an effective battery that's attached to the machine and to the electric power network constantly, so in the event of any disturbance, it's already functioning, which enables the server to carry on doing the job without losing any info. The diesel generator is an engine that can power up an entire data center. It needs some time to start working and it's the UPS that provides this time. These two power solutions are a necessity for any facility or service provider that wants to stop data loss and hardware damage as a consequence of an unexpected power problem.