A crash can cause the loss of work from many computers simultaneously. The real threat is if a spike or high voltage surge enters your computer causing a loss of everything on your hard drive. A. Brownouts or sags are short periods of decreased voltage levels. This is the most common problem with power supplies and is caused by electrical devises such as air conditioners, heaters or office machines starting up. Your power company can also-cause brownouts by reducing electrical supply to compensate for high power demands within the system.
Brownouts can cause computer lock-up, data loss or corruption and loss of files.
Overall efficiency and life-span of electrical equipment and battery life of a UPS is effected by brownouts. A. A blackout is a total loss of power. Blackouts are caused by lightning and storms, generator faults and accidents. Blackouts will cause a loss of current unsaved files and can cause corruption of files not completely written to the hard disc. A. A spike is a very dramatic impulse of increased voltage.