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:
Oct. 03, 2023
Filed:
Mar. 07, 2022
Hitachi, Ltd., Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
An amount of writing data to storage devices can be kept low in additional processing for solving the write hole problem. A storage system includes a computer(s), a nonvolatile storage device(s), and a high-speed storage device(s) which can be accessed at a higher speed than the above-mentioned storage device(s), and a drive log including write log information is recorded in the high-speed storage device. When the computer receives a write request for write data, the computer firstly performs drive log check processing and then performs data write processing. In the drive log check processing, if a redundant write log record is recorded in a drive log, the computer changes the write log status of the redundant write log record to 'completed' by targeting at the drive log and the write log information and then proceeds to the data write processing; and if the redundant write log record is not recorded in the drive log, the computer proceeds to the data write processing without changing the drive log or the write log information.