公开(公告)号：JP2001125829A

公开(公告)日：2001-05-11

申请号：JP30660599

申请日：1999-10-28

Applicant: IBM ,  PROMISE TECHNOLOGY INC

Inventor： KANAMARU ATSUSHI ,  ASANO HIDEO ,  KIHASHI AKIRA ,  KUSHIDA KOICHI ,  SAITO TAKAHIRO ,  CHICHEN UU ,  KELVIN KAO

IPC: G06F12/08 ,  G06F3/06 ,  G06F9/32 ,  G06F9/34 ,  G06F9/38 ,  G06F13/38

Abstract: PROBLEM TO BE SOLVED: To execute detailed analysis and prediction by an outside controller in reponse to a true request from an application, and to issue a look-ahead request to an auxiliary storage device such as an HDD. SOLUTION: An HDC card 21, which stores data and is connected to an HDD device 22 having a cache memory, is provided with an access request trace part 61 for directly tracing a true access request from an application program to be executed by a host from the application program, a speculative request deciding part 62 for deciding a speculative request estimated in the future based on the traced true access request, and an HDC 31 for issuing the decided speculative request to the HDD device 22.