Fujitsu Corporation

Kentarou Yuasa

Takanori Ishii

Shinnosuke Matsuda

Ryo Kubota

Yoshihiko Takeda

Shogo Hiyama

An electronic system includes N electronic components where N is an integer of 2 or more, (N+1) batteries, and N selection circuits associated with the respective N electronic components. Each of the N electronic components is coupled to two batteries among the (N+1) batteries. Combinations of two batteries coupled to the respective N electronic components are different from each other. Each of (N&#x2212;1) batteries among the (N+1) batteries is coupled to two electronic components among the N electronic components. Combinations of two electronic components coupled to the respective (N&#x2212;1) batteries are different from each other. Each of the N selection circuits is configured to supply, as driving power, electric power output from at least one of two batteries coupled to a corresponding electronic component among the N electronic components to the corresponding electronic component.

Electronic system, information processing device, and control method

A voltage control apparatus includes a boost converter configured to convert an input voltage to a voltage equal to or higher than a first voltage in an operative state and directly output the input voltage in an inoperative state, a buck-boost converter coupled with the boost converter in parallel and configured to convert the input voltage to a second voltage lower than the first voltage, a memory, and a processor coupled to the memory and configured to keep the buck-boost converter in the operative state, set the boost converter to the inoperative state when the input voltage is equal to or higher than the first voltage, and change the boost converter to the operative state when the input voltage is lower than the first voltage.

Voltage control apparatus

A power supply control apparatus includes a control circuit configured to obtain a value of power consumed by a specified device to which plural power supply devices supply power and further configured to determine based on the obtained power value and a predetermined value obtained from power conversion efficiency of each power supply device among the plural power supply devices, a scheme of supplying power to the specified device to be any one among a first scheme in which the plural power supply devices supply power and a second scheme in which among a first power supply device and a second power supply device included in the plural power supply devices, voltage of power supplied by the first power supply device is made lower than that of power supplied by the second power supply device, whereby the second power supply device supplies power.

Power supply control apparatus and computer product

A power supply control device for a system having two or more power supply devices, configured to control a first power supply device that includes a compensation device configured to perform power compensation at a time of power failure, the power supply control device includes a controller configured to limit the power compensation of the compensation device in a normal state, and release the limitation on the power compensation of the compensation device if detecting power failure of the first power supply device and detecting power failure of a second power supply device provided redundantly in addition to the first power supply device.

Power supply control device and power supply device

A processing apparatus includes a first memory, a second memory, a capacitor, and a processor coupled to the first memory and the second memory. The processor is configured to cause power feeding from the capacitor, and execute a first processing to cause the first memory to hold data, after the power feeding is caused from the capacitor, cause a battery to start power feeding in at least one of a case where the power feeding from an external power source is not started after being halted and an output voltage of the capacitor has fallen below a first value, and a case where the power feeding from the external power source is not started after being halted and a first time period has elapsed, and execute a second processing to write the data from the first memory into the second memory during the power feeding from the battery.

Processing apparatus, method, and non-transitory computer-readable storage medium

There is provided a control device which includes a cache memory configured to temporarily store data, a nonvolatile memory configured to store a copy of the data stored in the cache memory, a battery configured to supply power to the cache memory in a case of a power failure, a data save processing unit configured to save data stored in a backup target region of the cache memory to the nonvolatile memory in the case of the power failure, and a charge control unit configured to charge the battery up to a target amount of charge which is determined on the basis of a size of the backup target region.

Control device, power supply device, and method for controlling power

According to an aspect of the embodiment, a cache controller sets, when power supply capacity information is acquired at an update period, a size of a permitted area in which the writing of dirty data is permitted and a size of an inhibited area in which the writing of the dirty data is inhibited in a cache memory, according to the power supply capacity information. The cache controller stores the dirty data or read data read out from a disk array in the permitted area, or stores only the read data in the inhibited area.

Method and apparatus for controlling cache memory areas

A power distribution device includes power distribution ports that are connected to electric devices, respectively, and distribute a power supply signal to the electric devices, an inrush current suppressing circuit that collectively suppresses an inrush current on an upstream side ahead of the electric devices, a controller that detects an occurrence of the inrush current and outputs a switching instruction, and a switch that switches, based on the switching instruction, a path for the power supply signal to a first power supply path that causes the power supply signal to be input to the inrush current suppressing circuit when the inrush current has occurred, and that switches, on based on the switching instruction, the path for the power supply signal to a second power supply path that causes the power supply signal to bypass the inrush current suppressing circuit when the inrush current has not occurred.

Power distribution device, power distribution system and method for suppressing inrush current

An information processing apparatus includes a controller, a plurality of electric power supply units and a backup electric power supply unit that supply electric power to the controller. The controller detects a malfunction occurring in the plurality of electric power supply units, stops electric power supply from the plurality of electric power supply units, starts electric power supply from the backup electric power supply unit when a malfunction is detected, identifies an electric power supply unit having a malfunction from the plurality of electric power supply units, disconnects the identified electric power supply unit, resumes electric power supply from an electric power supply unit determined to function normally and stops the electric power supply from the backup electric power supply unit when the electric power supply unit having the malfunction is disconnected.

Information processing apparatus, control apparatus, and method

A storage control apparatus includes a plurality of temporary storage units that are managed in a redundant manner by data mirroring, and temporarily store data input from an outside source; a temporary-storage control unit that controls input and output of the data to the temporary storage units; and a mirroring control unit that controls the data mirroring between the temporary storage units, checks, when performing the data mirroring, validity of the data stored in a temporary storage unit of a mirroring source, and executes, when the validity of the data has been confirmed, the data mirroring.

Storage control apparatus and external storage apparatus

A power supply unit generates a predetermined voltage from power supplied from an external power supply and outputs the voltage to a power supply line. A battery charge/discharge circuit charges a battery with the voltage supplied and determines whether to supply an output voltage of the battery to the power supply line to activate a backup power supply based on an output control signal. A monitoring unit judges whether a disk array apparatus is operable in accordance with an instruction from a host computer, and outputs, when the disk array apparatus is operable, an output signal for activating the backup power supply, and when the disk array apparatus is not in the operation mode, outputs an output control signal for inactivating the backup power supply to the battery charge/discharge circuit.

Method of controlling power within a disk array apparatus

A bus connection circuit is connected by a bus to a bridge circuit having a plurality of pre-fetch buffers to access memory. A plurality of request queues and a plurality of request signal outputs and grant signal inputs are provided in a single bus connection device. By means of the single bus connection device, a plurality of pre-fetch buffers of a bridge circuit can be utilized effectively, wasted read requests corresponding to retry responses from the bridge circuit can be decreased, and consequently wasted use of a PCI bus can be reduced.

Bus connection circuit and bus connection system having plural request queues, a bus interface portion outputting request signals, an arbiter performing arbitration of plural requests and a bus interface portion outputting a request signal indicating allocation of pre-fetch buffers corresponding to arbitrated requests

Growing community of inventors

Chofu, Japan

Kentarou Yuasa