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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.:

US 9720616 B1

PDFFull Text
Date of Patent:
Aug. 01, 2017

Filed:

Nov. 09, 2015

Data-retention controller/driver for stand-alone or hosted card reader, solid-state-drive (ssd), or super-enhanced-endurance ssd (seed)

Applicant:

Super Talent Technology Corp., San Jose, CA (US);

Inventors:

Frank Yu, Palo Alto, CA (US);

Abraham C. Ma, Fremont, CA (US);

Shimon Chen, Los Gatos, CA (US);

Assignee:

Super Talent Technology, Corp., San Jose, CA (US);

Attorneys:

Stuart T. Auvinen

gPatent LLC

Primary Examiner:

Sheng-Jen Tsai

Int. Cl.
CPC ...
G06F 12/00 (2006.01); G06F 13/00 (2006.01); G06F 13/28 (2006.01); G06F 3/06 (2006.01); G06F 13/42 (2006.01); G06F 12/02 (2006.01); G11C 11/56 (2006.01); G11C 13/00 (2006.01); G11C 29/00 (2006.01); G11C 16/34 (2006.01); G06F 12/14 (2006.01);
U.S. Cl.
CPC ...
G06F 3/064 (2013.01); G06F 3/0604 (2013.01); G06F 3/0608 (2013.01); G06F 3/0631 (2013.01); G06F 3/0643 (2013.01); G06F 3/0647 (2013.01); G06F 3/0685 (2013.01); G06F 3/0688 (2013.01); G06F 12/0246 (2013.01); G06F 13/4282 (2013.01); G06F 12/1408 (2013.01); G06F 2212/401 (2013.01); G06F 2212/7203 (2013.01); G06F 2212/7208 (2013.01); G06F 2212/7211 (2013.01); G11C 11/5678 (2013.01); G11C 13/0004 (2013.01); G11C 16/349 (2013.01); G11C 29/765 (2013.01);
Abstract

A Green NAND SSD Driver (GNSD) driver executes on a host to increase data-retention of flash memory attached to a Super Enhanced Endurance Device (SEED) or Solid-State Drive (SSD). Host accesses to flash are intercepted by the GNSD driver using upper and lower-level filter drivers. A retention-check timer causes a retention routine to be periodically executed. The routine sends high-level commands to the SEED that causes the SEED to refresh either all data or just data blocks with older write dates. Data is refreshed by moving to a new physical block. The retention routine can track write dates of logical blocks and command a SSD to move logical blocks with older write dates. A retention card has a controller that performs the retention routine when not connected to a host, while a SEED power card allows the SEED to refresh data when no host is attached to the SEED.

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