US 11,954,334 B2
Back-to-back power loss protection
Thomas Tam Ta, San Jose, CA (US); Oleg Kragel, San Jose, CA (US); Yosief Ataklti, Fremont, CA (US); and Kwangyoung Lee, San Jose, CA (US)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Apr. 28, 2022, as Appl. No. 17/731,762.
Prior Publication US 2023/0350575 A1, Nov. 2, 2023
Int. Cl. G06F 3/06 (2006.01); G06F 1/30 (2006.01)
CPC G06F 3/0619 (2013.01) [G06F 1/30 (2013.01); G06F 3/0656 (2013.01); G06F 3/0659 (2013.01); G06F 3/0673 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A data storage device, comprising:
a controller configured to:
set an upper back-to-back (B2B) power loss prevention (PLP) time threshold;
set a lower B2B PLP time threshold;
enter a defensive PLP detecting mode when a B2B PLP time is between the upper B2B PLP time threshold and the lower B2B PLP time threshold, wherein during defensive PLP detecting mode the controller is configured to:
determine that PLP time is below the lower B2B PLP time threshold; and
track a number of consecutive times that the PLP time is below the lower B2B PLP time threshold with a lower threshold tracker; and
enter a defensive PLP mode when the number of consecutive times is equal to a predetermined number.