Hitachi, Ltd.

Naoki Okada

Nobuyuki Minowa

Toshio Asai

Hiroshi Suzuki

Kenji Mori

Shin Nakamura

Hidehiro Nagaya

Sota Koizumi

A transmission control method includes: determining transmission performance in a transmission line by using a parameter that determines a size of an opening of an eye pattern; and adjusting a transmission parameter that is a parameter having an influence on transmission quality in the transmission line on the basis of a result of the determination.

Transmission control method and transmission control system

A cooling mechanism includes a plurality of first circuit boards arranged in parallel with each other, one or more first fans for generating a cooling wind in a first flow path formed along the plurality of first circuit boards, and a connection board arranged orthogonally to the first flow path and at a position different from a position of the first flow path, and coupling the plurality of first circuit boards.

Cooling mechanism of storage control apparatus

For a storage system provided with a plurality of storage modules including a first storage module and a second storage module, the first storage module is provided with a first switch circuit including a plurality of ports and a first circuit connected to any of the plurality of ports included in the first switch circuit via an internal path, and the second storage module is provided with a second circuit. A direct path that is a path for connecting the first switch circuit and the second circuit is connected to any of the plurality of ports included in the first switch circuit. The first circuit issues a packet addressed to the second circuit. The first switch circuit receives the packet addressed from the first circuit to the second circuit, and outputs the packet from a port connected to the direct path to the second circuit.

Storage system provided with a plurality of storage modules

A storage apparatus according to the present invention can store information related to a power supply abnormality after shutting down the principal functions of a data processing board when a power supply abnormality occurs in a data processing board. A power supply controller of a data processing board mounted in the storage apparatus monitors the operational status of DC/DC power supplies mounted to the data processing board, on the basis of detection signals from a voltage detection circuit. When a power supply abnormality is detected, the power supply controller immediately shuts down the operation of all the DC/DC power supplies. Shutting down the DC/DC power supplies also shuts down the principal functionality of the data processing board. Then, after storing information related to the power supply abnormality in memory, the power supply controller shuts down the auxiliary power supply. The information stored in memory can be transmitted to a management apparatus by way of an intermediary apparatus, which is another data processing board or the like.

Storage apparatus and storage apparatus power supply failure management method

According to the present invention, in cases where a CHA function and a DKA function are mounted within a single package, a battery power supply that is used during the occurrence of power supply trouble is effectively utilized so that the supply of power can be separately controlled for each function. A CHA part and DKA part are disposed in a single control package. When trouble such as a power outage is detected, the CHA part blocks access requests from the host, and initiates end processing. When the end processing of the CHA part is completed, the package internal power supply control part stops the clock supply to the CHA part. Then, when the DKA part completes destage processing, the package internal power supply control part stops the supply of power to the DKA part. The power consumption of the package is lowered in stages in accordance with the progress of the end processing.

Storage device and storage device power consumption control method

A storage system includes a plurality of kinds of packages such as channel adapters, cache switches, disk adapters, basic memory boards, a shared memory, cache memories, memory board expansions and individual disk drives. Nonvolatile memories are mounted on each of those packages to store event information concerning the package on which the respective memory is mounted. In case a package is exchanged or newly installed or in case a package fails, the event information is stored in the nonvolatile memory of the package in correspondence with the packaging position information of the package in the storage system, so that this event information can be accessed at any time.

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Odawara, Japan

Naoki Okada