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. 02, 2018
Filed:
Dec. 28, 2016
Emc Ip Holding Company Llc, Hopkinton, MA (US);
Jian Gao, Beijing, CN;
Peter Puhov, Shrewsbury, MA (US);
Jianbin Kang, Beijing, CN;
Geng Han, Beijing, CN;
Hongpo Gao, Beijing, CN;
Jibing Dong, Beijing, CN;
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
Techniques are disclosed for drive zeroing that create and maintain a memory resident zeroing map for each drive in a data storage system. The disclosed techniques create, for each drive in an array of non-volatile data storage devices, a zeroing map. The zeroing map for a drive includes multiple slots, each of which corresponds to a data storage area of the drive. Each slot in the zeroing map for a drive stores a zeroing status of the corresponding data storage area. The value of a slot in the zeroing map may indicate that the zeroing status of the corresponding data storage area is i) zeroed, indicating that the corresponding data storage area has previously been zeroed, or ii) unknown, indicating that the zeroing status of the corresponding data is unknown, i.e. the corresponding data storage area may or may not have previously been zeroed.