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. 09, 2021
Filed:
Oct. 12, 2017
Western Digital Technologies, Inc., San Jose, CA (US);
Rishabh Dubey, Bangalore, IN;
Saugata Das Purkayastha, Bangalore, IN;
Chaitanya Kavirayani, Bangalore, IN;
Sampath Raja Murthy, Bangalore, IN;
Nitin Gupta, Bangalore, IN;
Revanasiddaiah Prabhuswamy Mathada, Bangalore, IN;
WESTERN DIGITAL TECHNOLOGIES, INC., San Jose, CA (US);
Abstract
Aspects of the disclosure provide for management of a flash translation layer (FTL) for a non-volatile memory (NVM) in a Solid State Drive (SSD). The methods and apparatus provide a logical to physical (L2P) table where a first portion of the table is used for mapping frequently accessed hot data to a first subdrive in the NVM. Additionally, a second portion of the L2P table is provided for mapping cold data less frequently accessed than the hot data to a second subdrive, where logical blocks for storing the cold data in the second subdrive are larger than logical blocks storing the hot data in the first subdrive. Separation of the L2P table into hot and cold subdrives reduces the L2P table size that is needed in RAM for logical to physical memory mapping, while at the same time provides lower write amplification and latencies, especially for large capacity SSDs.