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:
Jan. 14, 2025
Filed:
Sep. 14, 2023
Applicant:
Hitachi, Ltd., Tokyo, JP;
Inventors:
Katsuya Tanaka, Tokyo, JP;
Kentaro Shimada, Tokyo, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G06F 12/02 (2006.01); G06F 13/16 (2006.01); G06F 13/18 (2006.01); G06F 13/40 (2006.01);
U.S. Cl.
CPC ...
G06F 12/0292 (2013.01); G06F 13/1642 (2013.01); G06F 13/18 (2013.01); G06F 13/4022 (2013.01);
Abstract
A frontend interface of a controller according to the present invention includes a plurality of corresponding queueing interfaces for each processor of the controller, and an enqueueing destination of a host I/O command can be switched in response to an instruction from a processor. When a controller OS restarts, the controller waits for completion of a host I/O and executes controller blocking and restarting during setup. Therefore, to determine whether or not this process is possible, the processor gives an instruction to switch a queue and waits until a switch source queue is empty.