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:
Mar. 22, 2022
Filed:
Feb. 25, 2020
Emc Ip Holding Company Llc, Hopkinton, MA (US);
Boris Glimcher, Bnei Brak, IL;
Amitai Alkalay, Kadima, IL;
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
A storage system comprises a disk array enclosure comprising an enclosure controller, a cache comprising a metadata journal, a plurality of data storage devices and a plurality of metadata storage devices. The enclosure controller is configured to write a stripe metadata page to the metadata storage devices that corresponds to a stripe of data stored on the data storage devices and to determine that the write of the stripe metadata page failed for a first metadata storage device. The enclosure controller is configured to add an entry to the metadata journal based on the determination that the write failed. The entry comprises an indication of the first metadata storage device and the stripe of data. The enclosure controller is configured to set an indication in a data structure associated with the disk array enclosure that the stripe metadata page has not been written to the first metadata storage device.