Abstract: The storage system includes a PLD (Programmable Logic Device), which controls data transfer between another device and a media drive; and a processor. The PLD includes a memory for storing information input from an information source located externally to the PLD; a circuit element group including a plurality of circuit elements; and a logical circuit configured on the circuit element group in accordance with the information in the memory. The processor detects whether a soft error has occurred in the memory, detects whether or not an error has occurred in the logical circuit, and implements control in accordance with the results of the two detection operations.

Abstract: The storage system comprises a PLD which controls data transfer between another device and a media drive; and a processor. The PLD comprises a memory for storing information input from an information source located externally to the PLD; a circuit element group comprising a plurality of circuit elements; and a logical circuit configured on the circuit element group in accordance with the information in the memory. The processor detects whether a soft error has occurred in the memory, detects whether or not an error has occurred in the logical circuit, and implements control in accordance with the results of the two detection operations.

Abstract: A computing section controls a hot swap circuit, and DC/DC converters based on binary data from an ADC and an interrupt signal from respective comparing sections of a voltage detecting circuit. If the interrupt signal is input from any one of the respective comparing sections, the reading of binary data corresponding to the interrupt signal is halted. The binary data relating to the voltage detecting section corresponding to the interrupt signal, which is held in the SRAM at that time, is transferred to a non-volatile memory, where it is stored. When driving of the system has been halted, binary data is read out from the non-volatile memory, in order to analyze the cause of the error in a DC/DC converter which indicates an error output voltage from one of power supply circuits for supplying externally a plurality of different drive voltages to loads in a disk array unit.

Abstract: A computing section controls a hot swap circuit, and DC/DC converters based on binary data from an ADC and an interrupt signal from respective comparing sections of a voltage detecting circuit. If the interrupt signal is input from any one of the respective comparing sections, the reading of binary data corresponding to the interrupt signal is halted. The binary data relating to the voltage detecting section corresponding to the interrupt signal, which is held in the SRAM at that time, is transferred to a non-volatile memory, where it is stored. When driving of the system has been halted, binary data is read out from the non-volatile memory, in order to analyze the cause of the error in a DC/DC converter which indicates an error output voltage from one of power supply circuits for supplying externally a plurality of different drive voltages to loads in a disk array unit.

Abstract: In the past, a power supply distance between a power source and an LSI package could not be shortened and power supply variations could easily produce an adverse effect. To reduce the power supply distance between the LSI and power supply module the power supply module is mounted on an upper surface of the LSI package. As a result, the power source noise can be reduced, the efficiency and response rate of the power source unit are high, and the generated electromagnetic field can be reduced. Moreover, since each LSI package has a power supply module required therefore, the number of required power source types (voltage types) on the substrate with the package mounted thereon can be decreased. As a result, the mounting efficiency can be increased and the substrate can be manufactured at a low cost.

Abstract: In the past, a power supply distance between a power source and an LSI package could not be shortened and power supply variations could easily produce an adverse effect.