The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 2002
Filed:
Dec. 23, 1998
Naoaki Okayasu, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An apparatus including an input/output control device and an associated method are disclosed. The method includes a list with read requests recorded therein in the order of generation thereof is provided for each client, and a read request from a client is added to an end of a list for the client, when the request is generated within a specified period of time after generation of the previous read request from the same client. When the request is generated after passage of the specified period of time, it is added to a header of a new list. Common sections of the two lists are recorded in a common table, and information instructing to refer to the common table is inserted into the lists in place of the common sections in the lists. Data is prefetched from the disk device and stored in a cache memory based on the content of the lists. Data corresponding to common sections between the two lists may be relocated or written in a continuous empty area of the disk device in a continuous state.