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:
Feb. 18, 2020
Filed:
Feb. 20, 2018
Western Digital Technologies, Inc., San Jose, CA (US);
Saugata Das Purkayastha, Bangalore, IN;
WESTERN DIGITAL TECHNOLOGIES, INC., San Jose, CA (US);
Abstract
Aspects of the disclosure provide for control of a flash translation layer (FTL) in a non-volatile memory (NVM). Disclosed methods and apparatus provide for receiving a message in the FTL, which is transmitted from a host device, and includes desired recycle ratio information that is determined by the host where the ratio is a number of host writes to a number of recycle writes to be performed by the FTL. Based on the recycle ratio information, the FTL determines a target recycle ratio and performs recycling of memory blocks in the NVM based on the determined target recycle ratio. In this manner, the host device is able to exert control over the recycle ratio utilized in the FTL via a transmitted message, which allows the recycle ratio to be more adaptive to host write conditions known to the host device, but not known in the SSD.