US 12,451,210 B2
Data storage device and method for read disturb mitigation during low-power modes
Pawan Kumar Negi, Bengaluru (IN); Meer Afroz Mohammed, Bengaluru (IN); and Bhavadip Bipinbhai Solanki, Bengaluru (IN)
Assigned to Sandisk Technologies, Inc., Milpitas, CA (US)
Filed by Sandisk Technologies, Inc., Milpitas, CA (US)
Filed on Jan. 12, 2024, as Appl. No. 18/411,397.
Prior Publication US 2025/0232829 A1, Jul. 17, 2025
Int. Cl. G11C 29/02 (2006.01); G11C 29/00 (2006.01); G11C 29/52 (2006.01)
CPC G11C 29/52 (2013.01) [G11C 29/022 (2013.01); G11C 29/886 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A data storage device comprising:
a memory; and
one or more processors, individually or in combination, configured to:
receive a command from a host to exit a low-power mode; and
in response to receiving the command from the host to exit the low-power mode:
use firmware randomization logic to perform a randomization process to randomly select a single wordline from a set of wordlines in the memory designated for an active read scan;
perform a bit error rate (BER) check on the randomly-selected single wordline and its two directly adjacent neighbor wordlines;
determine whether there is a BER failure on the randomly-selected single wordline or its two directly adjacent neighbor wordlines; and
in response to determining that there is a BER failure on the randomly-selected single wordline or its two directly adjacent neighbor wordlines, perform a BER estimation scan (BES) of the memory.