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:
Dec. 04, 2018
Filed:
Dec. 30, 2016
Emc Ip Holding Company Llc, Hopkinton, MA (US);
Hongpo Gao, Beijing, CN;
Jian Gao, Beijing, CN;
Wayne Li, Beijing, CN;
Shaoqin Gong, Beijing, CN;
Jibing Dong, Beijing, CN;
Lili Chen, Hopkinton, MA (US);
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
A data storage system creates, maintains and utilizes logical storage structures including (1) a pool of device extents on user devices, organized into data portions of mapped RAID groups each having a data portion and a RAID group metadata element having (i) a basic portion and (ii) a mapping portion mapping each set of device extents to logical RAID extents per RAID type, (2) a pool logical device (e.g., an internal mapped RAID) in the pool, storing the mapping portions of the metadata elements of the mapped RAID group, and (3) a system logical device on separate system devices, storing (i) the basic portions of the metadata elements of the RAID groups, and (ii) a pool metadata element including a pool mapping portion for the pool logical device.