No additional hardware is required and your system's stability does not get affected. There is also no need to configure or reboot the system. It defines how often your data is written from the cache to your hard-disk. Now, you have the chance to minimize the risk of loss of data on mission-critical servers caused by accidentally turning off the machine, a system crash or power failure.
File caching usually improves the speed of accessing files.
When they are read again, the system can retrieve them quickly directly from memory, instead of reading from the slower hard disk. Windows NT accesses your hard disk for reading and writing through its integrated File Cache-Management. Unfortunately, NT's file caching shows a misbehavior when handling file operations. It allocates main memory for the file cache, which is no longer available for running applications. This paradox situation leads to a dramatic decrease in system performance, caused by the file caching, which slows down your machine instead of making it faster.