The Fujitsu RAID ControllerPRAID EP420i with 8 ports sets speed and data security standards for internal storage drives. The RAID stack is based on the LSI MegaRAID and offers high data throughput, a comprehensive fault tolerance function and user-friendly management options. Moreover, the Controller management is integrated seamlessly into the Fujitsu server management concept. All controller functions are supported by the Fujitsu ServerView RAID Manager. Regardless of the drive speed, it delivers significant performance improvements in both read and write applications. A robust set of RAID features and demanding error tolerance functions the controller provides high RAID performance and data availability. Powerful online management service programs, which are simple to operate and quick to install, provide the administrator with unparalleled flexibility and access to the arrays. The RAID controller supports all of the important RAID levels. The optional flash battery backup combined with TFM module ensures the integrity of the data stored in the cache on the RAID controller in case of a power outage. In this event, the data will be copied to a non-volatile flash memory. The FBU provides a low-priced alternative to an uninterruptible power supply and, when compared to battery backup up units, enables a long-term, secure store of data and better serviceability.