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:
May. 10, 2022
Filed:
Aug. 11, 2020
Applicant:
Seagate Technology Llc, Fremont, CA (US);
Inventors:
Adithya Uligere Narasimhamurthy, Longmont, CO (US);
Ritvik Viswanatha, Longmont, CO (US);
Michael Barrell, Longmont, CO (US);
Assignee:
Seagate Technology LLC, Fremont, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 11/20 (2006.01); G06F 12/0806 (2016.01);
U.S. Cl.
CPC ...
G06F 11/2092 (2013.01); G06F 11/2071 (2013.01); G06F 12/0806 (2013.01); G06F 2201/82 (2013.01); G06F 2212/1032 (2013.01); G06F 2212/222 (2013.01);
Abstract
Systems and processes are disclosed to preserve data integrity during a storage controller failure. In some examples, a storage controller of an active-active controller configuration can back-up data and corresponding cache elements to allow a surviving controller to construct a correct state of a failed controller's write cache. To accomplish this, the systems and processes can implement a relative time stamp for the cache elements that allow the backed-up data to be merged on a block-by-block basis.