Hideo Takahashi

TL;DR: In this paper, a RAID control apparatus comprises at least a cache memory, an update information management table for storing update information, and a write unit for carrying out a write processing, in order to provide a write back method for a RAID apparatus capable of improving a processing speed at the time of updating.

TL;DR: In this paper, a write-back request for writing back new data in a cache memory to disk devices forming a redundant configuration of RAID is generated, and a writeback processing unit, reserves a parity buffer area in the cache memory, generates new parity, and then, writes the new data and the new parity to the corresponding disk devices.

TL;DR: In this paper, an error monitoring unit monitors an occurrence of an error in each of the plurality of storage devices to register information indicative of error occurrence conditions in an error information storage unit for each storage device.

TL;DR: In this article, a cylindrical surface is roughed to be prepared for a spray film to be formed thereon, by cutting therein rough undulations in a threaded form, using a cut chip leaving a groove part of a respective undulation in a preset direction or cut form, for breaking or partially tearing off a ridge part (21b) of the rough undulation to have a remainder of the ridge part formed with finer undulations.

TL;DR: A high quality nonimpact printer at a speed of 10,000 1/min is realized by a new laser scanning system and an electrophotographic process that has demonstrated the high quality printing of 10-dots/mm resolution.