Hitachi, Ltd.

Makoto Kogai

Naoya Takahashi

Kazuo Nakagoshi

Minoru Yoshida

Kenichi Takamoto

Hisao Honma

Satoshi Ohishi

Yoshifumi Morioka

Katsumi Otani

Kazuo Hara

Ken-ichi Takamoto

The present invention is related to a component and material traceability control apparatus for controlling manufacturing lot identification information of any of a component and material constituting a product manufactured according to a process where a manufacturing apparatus with not less than one component and material reserve unit picks up a needed amount out of the component and material reserved in the component and material reserve unit and manufactures the product, and the component and material traceability control apparatus is equipped with at least a processing unit, a memory unit used as a work area by the processing unit, a manufacturing performance information memory unit, a component and material supply performance information memory unit, and a manufacturing lot trace information memory unit.

Component and material traceability control apparatus, control method, control program, and control program memory medium

The write data is entered from the upper unit into a nonvolatile cache provided in a controller inside of each disk unit through a channel adaptor, a cache shared by each disk, and a disk adaptor. The data from the cache is compressed by the data compressing and restoring device and is written in the disk. At a time, the management information for compressed data is written in the cache and the disk as well. In case of breaking the management information of the cache when a failure takes place in the cache memory, the management information is written for each disk. Hence, the breakage does not have an adverse effect on the other disks. If the management information of the cache is broken, the management information given into the disk may be replaced with the broken information.

Data storing system and data transfer method

A semiconductor storage device transfers data with an information processing device and includes a non-volatile semiconductor memory in which data is electrically re-writable, a volatile semiconductor memory connected to the non-volatile memory and temporarily storing data of the non-volatile semiconductor memory, and a CPU connected to the volatile semiconductor memory and the non-volatile semiconductor memory. The CPU controls the transfer of data among the non-volatile memory, the volatile memory and the CPU. The CPU also transfers data with the information processing device in accordance with a fixed-length form for data. When an access from the CPU to the volatile semiconductor makes a miss hit (i.e., misses), the CPU accesses the non-volatile semiconductor memory. When a failure is generated in the non-volatile semiconductor memory or when a predicted service life of the non-volatile semiconductor memory is elapsed, the non-volatile semiconductor memory can be substituted by an alternate memory.

Semiconductor disk storage

A semiconductor storage device is connected to at least one magnetic storage device. The input and output of data is made between the semiconductor storage device and an information processing device. The semiconductor storage device includes an electrically erasable non-volatile semiconductor memory which stores directory information of data stored in the magnetic storage device, a volatile semiconductor memory which has a storage capacity smaller than that of the non-volatile semiconductor memory and the storage contents of which are updated to store a part of the directory information having a higher frequency of access from the information processing device, and a CPU connected to the volatile semiconductor memory and the non-volatile semiconductor memory for making access to the volatile semiconductor memory and the non-volatile semiconductor memory in accordance with an access request from the information processing device, wherein when access to the volatile semiconductor memory made for access from the information processing device to the magnetic storage device hits on the part of the directory information, the CPU transfers the part of the directory information to the information processing device without making access to the non-volatile semiconductor memory and the information processing device makes access to the magnetic storage device on the basis of the part of the directory information When a failure is generated in the non-volatile semiconductor memory or when a predicted service life of the non-volatile semiconductor memory is elapsed, the non-volatile semiconductor memory is substituted by an alternate memory.

Semiconductor disc storage

Data storing system and data transfer method with a plurality of disk

Growing community of inventors

Odawara, Japan

Makoto Kogai