US 12,216,920 B2
SSD auxiliary battery power for handling ungraceful shutdown with host
Nian Yang, Mountain View, CA (US); and Judah Gamliel Hahn, Ofra (IL)
Assigned to SANDISK TECHNOLOGIES, INC., Milpitas, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Dec. 15, 2023, as Appl. No. 18/542,437.
Application 18/542,437 is a continuation of application No. 17/646,095, filed on Dec. 27, 2021, granted, now 11,934,664.
Prior Publication US 2024/0118814 A1, Apr. 11, 2024
Int. Cl. G06F 3/06 (2006.01); H02J 7/00 (2006.01)
CPC G06F 3/0619 (2013.01) [G06F 3/0658 (2013.01); G06F 3/0689 (2013.01); H02J 7/0063 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A storage device, comprising:
a memory;
a storage device controller coupled to the memory;
a storage device power management circuit coupled to the memory and the storage device controller; and
wherein the storage device power management circuit is configured to detect a loss in supplied power to the storage device, to cause the storage device controller to send a message indicating the loss in power, and to receive emergency power from a host device or a redundant array of independent disks (RAID) controller in response to the message, wherein the storage device controller is configured to determine an optimal amount of emergency power and time required to write data to the memory, and
wherein the storage device controller is configured to write data to the memory using the emergency power from the host device or the RAID controller.