Abstract: A system is utilized for detecting a RAID which includes a detector and a processor which electrically connects with the detector. The detector detects read/write state of a plurality of storage units, and generates a signal according to the read/write state respectively. The processor receives the signal, and determines the read/write state corresponding to the signal. When the read/write state of a first storage unit of the storage units is determined abnormal and wherein the processor sends a control signal, so as to interrupt a RAID mode of the system. Then, data stored in the first storage unit moves to the rest of the storage units according to the control signal.

Abstract: In a computer system with multiple operation modes and a method of switching modes, the computer system switches the operation modes with multiple hard disk drives by a setting signal. The method of switching modes includes the following steps. A chip unit detects the number of the hard disk drives with no storage of the boot program and the chip unit decides the operation mode of the Redundant Array of Independent Disks. The chip unit produces a corresponding control signal and transmits the control signal to a switch unit. The switch unit produces a setting signal according to the control signal and delivers to the hard disk device to switch the operation modes of the hard disk.

Abstract: A heat dissipation device is used for a circuit board, and plural electronic components are mounted on a surface of the circuit board. The heat dissipation device includes a heat dissipation plate that is made of metal. Once the heat dissipation plate shields above a surface of the circuit board, a distance exists between the heat dissipation plate and the surface so as to form an air flow passage to increase the heat dissipation performance.