International Business Machines Corporation

Koichi Kushida

Takahiro Saito

Atsushi Kanamaru

Hideo Asano

Akira Kibashi

Daniel James Colegrove

Kelvin Kao

Chi-Chen Wu

A method and apparatus for efficiently executing a read request issued from a host computer when write requests are cached in a cache memory.

Data storage apparatus, computer apparatus, data processing apparatus, and data processing method

An external controller performs a thorough analysis and prediction on true requests from an application to issue a look-ahead request to an HDD or other auxiliary storage. An HDC card is connected to an HDD device which stores data and has a cache memory. The HDC card, which controls the HDD device, includes an access request tracer for tracing a true access request made by an application program executed by a host directly from the application program, a speculation request determination section for determining a speculation request to be expected later based on the traced true access request, and an HDC for issuing the determined speculation request to the HDD device.

Controller device, disk controller, auxiliary storage, computer device, and method for controlling auxiliary storage

Growing community of inventors

Fujisawa, Japan

Koichi Kushida