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:
Jul. 16, 2013
Filed:
Dec. 06, 2011
Gosuke Okada, Fujisawa, JP;
Takashi Yamazaki, Hiratsuka, JP;
Mamoru Motonaga, Kaisei, JP;
Naoto Shiino, Oi, JP;
Takashi Nozawa, Odawara, JP;
Megumi Hokazono, Minamiashigara, JP;
Gosuke Okada, Fujisawa, JP;
Takashi Yamazaki, Hiratsuka, JP;
Mamoru Motonaga, Kaisei, JP;
Naoto Shiino, Oi, JP;
Takashi Nozawa, Odawara, JP;
Megumi Hokazono, Minamiashigara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In storage subsystems, due to the significant increase in HDD capacity, the time for executing online verification is elongated, affecting accesses from the host computer. By comprehending the status of accesses to the HDD, the sections where error has occurred and the status of restoration thereof, it becomes possible to detect defective or error sections efficiently at an early stage, according to which the reliability and access performance of the storage subsystem can be improved. The present storage subsystem executes one or more of the following processes: (M1) intensive verification of a circumference of an error LBA, (M2) an area-based prioritized verification, and (M3) continuous verification performed for a long period of time to (V1) an area in which error has occurred via IO access, (V2) a highly accessed area, and (V3) during a period of time when IO access is low.