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:
Apr. 17, 2018
Filed:
May. 17, 2016
Sandisk Technologies Llc, Plano, TX (US);
Senthil M. Thangaraj, Fremont, CA (US);
Divya Reddy, Milpitas, CA (US);
Aaron K. Olbrich, Morgan Hill, CA (US);
SanDisk Technologies LLC, Plano, TX (US);
Abstract
Systems and methods disclosed herein allow for efficiently managing unmapped blocks to extend life of solid-state drives. In one aspect, a method includes: measuring a level of over-provisioning ('OP') in a storage device and operating it in a first mode of operation while the OP satisfies a first threshold. The method also includes: changing to a second mode of operation if the OP does not satisfy the first threshold. While operating in the second mode of operation, the method includes: (i) determining an unmapped portion of a declared storage capacity of the storage device; and (ii) determining whether processing a write command would reduce the unmapped portion to less than a second threshold. If processing the write command wouldn't reduce the unmapped portion to less than the second threshold, the method includes: accepting and processing the write command. Else, the method includes: forgoing acceptance and processing of the write command.