US 12,189,977 B2
System and method for fine granular retention control in storage devices
Ramdas P. Kachare, Pleasanton, CA (US); and Dongwan Zhao, San Jose, CA (US)
Assigned to SAMSUNG ELECTRONICS CO., LTD., (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Jul. 1, 2021, as Appl. No. 17/366,017.
Claims priority of provisional application 63/187,919, filed on May 12, 2021.
Prior Publication US 2022/0365707 A1, Nov. 17, 2022
Int. Cl. G06F 3/00 (2006.01); G06F 3/06 (2006.01); G06F 12/02 (2006.01)
CPC G06F 3/0655 (2013.01) [G06F 3/0604 (2013.01); G06F 3/0679 (2013.01); G06F 12/0253 (2013.01); G06F 2212/702 (2013.01); G06F 2212/7205 (2013.01); G06F 2212/7211 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A storage device, comprising:
a host interface to receive a write request from a host, the write request including a data and a logical address of the data;
a first storage for the data;
a retention period determiner to identify a data set associated with the data and a second data, and to determine a retention period and a number of extensions for the data set;
a translation layer to select a physical address in the first storage to store the data based at least in part on the retention period;
a second storage for a logical-to-physical mapping table to store the logical address associated with the physical address, the retention period, and the number of extensions; and
a controller to program the data into the physical address in the first storage.